BASIC RESEARCH
The effects of antidepressants and pilocarpine on rat parotid glands: an immunohistochemical study
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Checkpoint arrows represent identified blood vessels. <span class="elsevierStyleBold">Figure - 1B</span> (right): Patellar tendon section stained with hematoxylin-eosin (10×).</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Fernando Travaglini Penteado, Flávio Faloppa, Guilherme Giusti, Vinícius Ynoe Moraes, João Carlos Belloti, João Baptista Gomes dos Santos" "autores" => array:6 [ 0 => array:2 [ "nombre" => "Fernando Travaglini" "apellidos" => "Penteado" ] 1 => array:2 [ "nombre" => "Flávio" "apellidos" => "Faloppa" ] 2 => array:2 [ "nombre" => "Guilherme" "apellidos" => "Giusti" ] 3 => array:2 [ "nombre" => "Vinícius Ynoe" "apellidos" => "Moraes" ] 4 => array:2 [ "nombre" => "João Carlos" "apellidos" => "Belloti" ] 5 => array:2 [ "nombre" => "João Baptista Gomes" "apellidos" => "dos Santos" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593222019524?idApp=UINPBA00004N" "url" => "/18075932/0000006600000009/v1_202212011637/S1807593222019524/v1_202212011637/en/main.assets" ] "itemAnterior" => array:19 [ "pii" => "S1807593222019500" "issn" => "18075932" "doi" => "10.1590/S1807-59322011000900016" "estado" => "S300" "fechaPublicacion" => "2011-09-01" "aid" => "1950" "copyright" => "CLINICS" "documento" => "article" "crossmark" => 0 "licencia" => "https://creativecommons.org/licenses/by-nc/3.0/" "subdocumento" => "fla" "cita" => "Clinics. 2011;66:1597-603" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">CLINICAL SCIENCE</span>" "titulo" => "Prenatal tobacco exposure is related to neurobehavioral modifications in infants of adolescent mothers" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => "en" "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "1597" "paginaFinal" => "1603" ] ] "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig1" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 290 "Ancho" => 407 "Tamanyo" => 15712 ] ] "descripcion" => array:1 [ "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Correlation between the number of cigarettes consumed during gestation (X) and neonatal attention score (Y).</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Marina C.M. Barros, Sandro S. Mitsuhiro, Elisa Chalem, Ronaldo R. Laranjeira, Ruth Guinsburg" "autores" => array:5 [ 0 => array:2 [ "nombre" => "Marina C.M." "apellidos" => "Barros" ] 1 => array:2 [ "nombre" => "Sandro S." "apellidos" => "Mitsuhiro" ] 2 => array:2 [ "nombre" => "Elisa" "apellidos" => "Chalem" ] 3 => array:2 [ "nombre" => "Ronaldo R." "apellidos" => "Laranjeira" ] 4 => array:2 [ "nombre" => "Ruth" "apellidos" => "Guinsburg" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593222019500?idApp=UINPBA00004N" "url" => "/18075932/0000006600000009/v1_202212011637/S1807593222019500/v1_202212011637/en/main.assets" ] "en" => array:19 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">BASIC RESEARCH</span>" "titulo" => "The effects of antidepressants and pilocarpine on rat parotid glands: an immunohistochemical study" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "1605" "paginaFinal" => "1610" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Tatiana Maria Folador Mattioli, Silvana da Silva, Ana Maria Trindade Grégio, Maria Ângela Naval Machado, Antônio Adilson Soares de Lima, Luciana Reis Azevedo-Alanis" "autores" => array:6 [ 0 => array:3 [ "nombre" => "Tatiana Maria Folador" "apellidos" => "Mattioli" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">I</span>" "identificador" => "aff1" ] ] ] 1 => array:3 [ "nombre" => "Silvana" "apellidos" => "da Silva" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">I</span>" "identificador" => "aff1" ] ] ] 2 => array:3 [ "nombre" => "Ana Maria Trindade" "apellidos" => "Grégio" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">II</span>" "identificador" => "aff2" ] ] ] 3 => array:3 [ "nombre" => "Maria Ângela Naval" "apellidos" => "Machado" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">III</span>" "identificador" => "aff3" ] ] ] 4 => array:3 [ "nombre" => "Antônio Adilson Soares" "apellidos" => "de Lima" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">III</span>" "identificador" => "aff3" ] ] ] 5 => array:4 [ "nombre" => "Luciana Reis" "apellidos" => "Azevedo-Alanis" "email" => array:1 [ 0 => "l.azevedo@pucpr.br" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">II</span>" "identificador" => "aff2" ] 1 => array:2 [ "etiqueta" => "*" "identificador" => "cor1" ] ] ] ] "afiliaciones" => array:3 [ 0 => array:3 [ "entidad" => "Department of Stomatology, School of Dentistry, Pontifical Catholic University of Paraná, Curitiba, Brazil." "etiqueta" => "I" "identificador" => "aff1" ] 1 => array:3 [ "entidad" => "School of Dentistry, Pontifícia Universidade Católica do Paraná, Brazil." "etiqueta" => "II" "identificador" => "aff2" ] 2 => array:3 [ "entidad" => "Department of Stomatology, School of Dentistry, Universidade Federal do Paraná, Brazil." "etiqueta" => "III" "identificador" => "aff3" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor1" "etiqueta" => "*" "correspondencia" => "Tel.: 55 41 3271-2592" ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig4" "etiqueta" => "Figure 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 297 "Ancho" => 447 "Tamanyo" => 51993 ] ] "descripcion" => array:1 [ "en" => "<p id="spara40" class="elsevierStyleSimplePara elsevierViewall">Immunohistochemical staining of calponin on myoepithelial cells (V30, original magnification 400X).</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle70">INTRODUCTION</span><p id="para10" class="elsevierStylePara elsevierViewall">The current generation of antidepressants includes drugs that only act on one neurotransmitter, such as the serotonin (fluoxetine) or the noradrenaline (reboxetine) selective reuptake inhibitors, and drugs that that act on multiple neurotransmitters (venlafaxine) without targeting other cerebral receptors that are not related to depression, such as histamine and acetylcoline.<a class="elsevierStyleCrossRefs" href="#bib1">1–2</a> Venlafaxine is a serotonin and noradrenaline reuptake inhibitor, and it exerts a weak activity as a dopamine reuptake inhibitor, which is only clinically significant at high doses.<a class="elsevierStyleCrossRefs" href="#bib3">3,4</a> The current antidepressants differ from the classic tricyclic antidepressants and from the monoamine oxidase inhibitors, which are irreversible, because of their enhanced pharmacological selectivity and diminished side effects.<a class="elsevierStyleCrossRef" href="#bib5">5</a></p><p id="para20" class="elsevierStylePara elsevierViewall">In a Cochrane systematic review (1966-2004), the adverse effects of fluoxetine (dry mouth sensation, dizziness, and sudoresis) were compared with the adverse effects of the most recent antidepressants (venlafaxine, reboxetine, phenelzine, and nefazodone), and the adverse effects were shown to be less pronounced in the more recent drugs.<a class="elsevierStyleCrossRef" href="#bib6">6</a></p><p id="para30" class="elsevierStylePara elsevierViewall">Xerostomia is defined as a subjective sensation of dry mouth reported by the patient. It can result from a reduction in saliva secretion, but it can also occur in the presence of a normal salivary flow rate.<a class="elsevierStyleCrossRef" href="#bib7">7</a> Stimulated salivary flow rate (SSFR) values of ≤0.7 mL/min are considered to indicate hyposalivation.<a class="elsevierStyleCrossRef" href="#bib8">8</a> Hyposalivation, xerostomia, and alterations in the saliva composition are important side effects related to the use of psychotropic medications, including antidepressants.<a class="elsevierStyleCrossRefs" href="#bib7">7,9–14</a> The mechanism by which these side effects occur has still not been completely clarified; however, histomorphometric and gravimetric studies have contributed to a better understanding of the cytotoxic effects of psychotropic drugs on the salivary glands.<a class="elsevierStyleCrossRefs" href="#bib12">12–15</a></p><p id="para40" class="elsevierStylePara elsevierViewall">Grégio et al.,<a class="elsevierStyleCrossRef" href="#bib12">12</a> studied the effects of chronic administration of a benzodiazepine (diazepam) and an antidepressant (amitryptiline) on the parotid glands of rats and observed hyposalivation and hypertrophy of the serous cells. These findings suggested a possible inhibition of the activity of the myoepithelial cells (originating from nervous stimulation), a decrease in the number of myoepithelial cells following chronic administration of psychotropic drugs, or an alteration in the number of acinar and ductal cells.</p><p id="para50" class="elsevierStylePara elsevierViewall">The myoepithelial cells, which are located between the basal lamina and the plasmatic membrane of the acinar cells and intercalated ducts, are nonmuscular cells that exert contractile functions and contribute to the emptying of the secretion from the secretory units and the ducts.<a class="elsevierStyleCrossRefs" href="#bib16">16,17</a> Calponin (C) is a protein located in myoepithelial cells that is involved in the regulatory system of smooth muscle contraction.<a class="elsevierStyleCrossRef" href="#bib18">18</a> Acinar and ductal cells are epithelial cells with proliferative potential for maintenance and regeneration.<a class="elsevierStyleCrossRefs" href="#bib19">19–23</a></p><p id="para60" class="elsevierStylePara elsevierViewall">The aim of this study was to evaluate the quantity of myoepithelial cells and the proliferation index of acinar and ductal cells of the parotid glands of rats treated with fluoxetine and venlafaxine using immunoreactions with calponin and proliferating cell nuclear anti-antigen (PCNA).</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle80">MATERIALS AND METHODS</span><p id="para70" class="elsevierStylePara elsevierViewall">This study was approved by the Research Ethics Committee at Universidade Tuiuti do Paraná (CEP-UTP n. 55/2003).</p><p id="para80" class="elsevierStylePara elsevierViewall">Parotid glands from male Wistar rats (<span class="elsevierStyleItalic">Rattus norvegicus albinus</span>, <span class="elsevierStyleItalic">Rodentia, mammalian</span>) with an approximate weight of 250 g were embedded in paraffin blocks from Laboratório de Patologia Experimental, Pontifícia Universidade Católica do Paraná. Ninety animals were allocated to nine groups, and each group was composed of ten animals. The animals received different treatments, which are described in <a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>.<a class="elsevierStyleCrossRef" href="#bib15">15</a></p><elsevierMultimedia ident="tbl1"></elsevierMultimedia><p id="para90" class="elsevierStylePara elsevierViewall">We used tissue microarrays (TMAs) containing ten cylinders of paraffinized salivary glands (3 mm in diameter) organized in lines and columns.<a class="elsevierStyleCrossRefs" href="#bib24">24,25</a> Each TMA exhibited ten specimens of salivary glands from the rats of each group.</p><p id="para100" class="elsevierStylePara elsevierViewall">For immunohistochemistry, anti-calponin, and anti-PCNA (DakoCytomation®; Dako North America, Carpinteria, CA, USA) antibodies were used. The secondary antibody was EnVision®+Dual Link/Peroxidase (DakoCytomation®), and the antigen-antibody reactions were revealed with a DAB substrate-chromogen system (DakoCytomation®). The slides were counterstained with Harris hematoxylin.</p><p id="para110" class="elsevierStylePara elsevierViewall">We used an anti-calponin (C) monoclonal antibody (Dako Corporation) for myoepithelial cell staining and an anti-PCNA antibody (Dako Corporation) for the staining of proliferating acinar and ductal cells. PCNA is a monoclonal antibody that allows the study of cell kinetics. The immunoreactions with C and PCNA used antibody dilutions of 1:800 and 1:400, respectively.</p><p id="para120" class="elsevierStylePara elsevierViewall">Slides were visualized by only one examiner using an Olympus® BX50 optical microscope (Olympus Corporation, Ishikawa, Japan) with a 40X objective. The immunohistochemical expression of C in the myoepithelial cells and PCNA in the acinar and ductal cells was analyzed by interpreting the entire TMA area.</p><p id="para130" class="elsevierStylePara elsevierViewall">The presence or absence of PCNA and C antibody staining was evaluated. Cells that exhibited any expression for PCNA or for C in the glandular epithelium were considered positive (represented by a brownish staining) regardless of the staining intensity.</p><p id="para140" class="elsevierStylePara elsevierViewall">There were 24 histological fields in each cylinder of paraffinized tissue. Before counting the number of stained cells, we verified the number of fields (out of 24) that could be evaluated. Therefore, the integrity and quality of the tissue and the presence of technical artifacts were taken into consideration. After evaluating the 24 histological fields of all cylinders, the numerical indices for the positive staining of cells for C and for PCNA were obtained.</p><p id="para150" class="elsevierStylePara elsevierViewall">To determine the average value of stained cells for C and PCNA from each cylinder, the average value of stained cells in a cylinder was represented by the sum of the number of stained cells for the antibody in each evaluated field divided by the number of evaluated fields. After obtaining the average value for each cylinder, the values were added together and divided by ten (equivalent to the total number of TMAs), which resulted in the average value of stained cells for each group.</p><p id="para160" class="elsevierStylePara elsevierViewall">In addition to the C and PCNA variables, this study also used the average values for the SSFR and cellular volume (CV) determined in a study by da Silva et al.<a class="elsevierStyleCrossRef" href="#bib15">15</a> Because the present study investigated the same sample as the da Silva et al. study, the SSFR and CV findings were compared with the immunohistochemical staining results for C and PCNA.</p><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle90">Statistical analysis</span><p id="para170" class="elsevierStylePara elsevierViewall">The data were analyzed using Statistical Package for Social Sciences (SPSS) software version 15.0 for Windows. The normality analysis was performed using the Kolmogorov-Smirnov test, and the Levene test was used to analyze the variance of homogeneity. For the groups with a normal distribution, analysis of variance (ANOVA) at one criterion was performed. When ANOVA at one criterion showed differences among the groups and treatment, the Tukey HSD multiple comparison test was used for the variables that presented variance of homogeneity among the groups. For the variables that did not present variance homogeneity, the Games-Howell test was used. The level of significance for all the statistical tests was set at 5% (<span class="elsevierStyleItalic">p</span><0.05).</p></span></span><span id="cesec40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle100">RESULTS</span><p id="para180" class="elsevierStylePara elsevierViewall">Three out of nine groups (C30, F30, and V30) were treated for 30 days, and six groups (C60, Pilo, FS60, VS60, FP60, and VP60) were treated for 60 days. The studied variables were C and PCNA, and they were compared with the CV and SSFR variables.<a class="elsevierStyleCrossRef" href="#bib15">15</a></p><span id="cesec50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle110">Groups treated for 30 days</span><p id="para190" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a> shows the average values, standard deviations, and <span class="elsevierStyleItalic">p</span>-values for the studied variables in the groups treated for 30 days (C30, F30, and V30). There were significant differences among the groups treated for 30 days for the SSFR, CV, PCNA, and C variables (<span class="elsevierStyleItalic">p</span><0.05).</p><elsevierMultimedia ident="tbl2"></elsevierMultimedia><p id="para200" class="elsevierStylePara elsevierViewall">Compared with the control group (C30), there was a significant increase in the number of myoepithelial cells (positively stained cells for C) in the groups treated with antidepressants (V30 and F30) (<span class="elsevierStyleItalic">p</span><0.05). In addition, there was a significant increase in the number of positively stained cells for PCNA in the group treated with venlafaxine (V30) compared with the C30 and F30 groups (<span class="elsevierStyleItalic">p</span><0.05).</p><p id="para210" class="elsevierStylePara elsevierViewall">SSFR was significantly decreased in the experimental (V30 and F30) groups compared with the control group (<span class="elsevierStyleItalic">p</span><0.05). Conversely, the highest average values for CV were observed in groups F30 and V30.</p></span><span id="cesec60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle120">Groups treated for 60 days</span><p id="para220" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl3">Table 3</a> shows the average values, standard deviations and <span class="elsevierStyleItalic">p</span>-values for the studied variables in the groups treated for 60 days (C60, Pilo, FS60, VS60, FP60, and VP60).</p><elsevierMultimedia ident="tbl3"></elsevierMultimedia><p id="para230" class="elsevierStylePara elsevierViewall">There were significant differences among the groups treated for 60 days for the CV, SSFR, and C variables (<span class="elsevierStyleItalic">p</span><0.05).</p><p id="para240" class="elsevierStylePara elsevierViewall">There was a significant increase in the number of positively stained cells for C in the group treated with fluoxetine and saline (FS60) compared with the control group (C60) (<span class="elsevierStyleItalic">p</span> = 0.0258). In addition, there was a significant decrease in the number of myoepithelial cells in group FP60 compared with all groups (<span class="elsevierStyleItalic">p</span><0.05).</p><p id="para250" class="elsevierStylePara elsevierViewall">SSFR was significantly increased in the group treated with venlafaxine and pilocarpine (VP60) compared with the group treated with venlafaxine and saline (VS60) (<span class="elsevierStyleItalic">p</span> = 0.0214). In addition, the highest SSFR average value was found in the Pilo group. Moreover, the lowest average value for CV was found in the Pilo group, whereas the highest CV value was found in the VP60 group (<span class="elsevierStyleItalic">p</span><0.05).</p><p id="para260" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRefs" href="#fig1">Figures 1-4</a> illustrate photomicrographs of the parotid glands of the rats in the experimental and control groups.</p><elsevierMultimedia ident="fig1"></elsevierMultimedia><elsevierMultimedia ident="fig2"></elsevierMultimedia><elsevierMultimedia ident="fig3"></elsevierMultimedia><elsevierMultimedia ident="fig4"></elsevierMultimedia></span></span><span id="cesec70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle130">DISCUSSION</span><p id="para270" class="elsevierStylePara elsevierViewall">The anticholinergic actions of psychotropic drugs have not been completely clarified. Many studies have suggested that central nervous system (CNS) drugs have pharmacological actions on the salivary glands. The attempts to clarify the xerostomic effects of such drugs have been of great scientific value, both in explaining the physiopharmacological effects and in bringing additional benefits to patients using these drugs.</p><p id="para280" class="elsevierStylePara elsevierViewall">In the present study, the chronic use of fluoxetine and venlafaxine for 30 days was associated with a decrease in SSFR, an increase in CV and an increase in the number of myoepithelial cells in rats. In addition, venlafaxine was associated with an increase in acinar and ductal cell proliferation in the parotid glands. Interestingly, the use of pilocarpine with venlafaxine for 60 days re-established a normal SSFR in rats. The number of myoepithelial cells remained stable in the parotid glands of rats that were treated for 60 days with venlafaxine irrespective of whether it was administered with saline or pilocarpine. Pilocarpine used in association with fluoxetine for 60 days did not induce changes in SSFR, but it was associated with a severe decrease in the number of myoepithelial cells in the parotid glands of rats. Considering these results, three main points must be discussed: the mechanisms of action of the medications on the CNS, physiological adaptation to the use of psychotropic medications, and alterations in receptor sensitivity due to the chronic use of medication.</p><p id="para290" class="elsevierStylePara elsevierViewall">Fluoxetine and venlafaxine have anticholinergic effects of different intensities. Because fluoxetine is a selective serotonin reuptake inhibitor, it may cause greater serotonin availability in the synaptic gap, which alters the binding of acetylcholine to the muscarinic receptors (M3) present in the salivary glands. Thus, fluoxetine may decrease the quantity of salivary secretion. Venlafaxine is an atypical antidepressant and acts as a reuptake inhibitor of serotonin, noradrenaline, and dopamine.<a class="elsevierStyleCrossRef" href="#bib11">11</a> Venlafaxine does not show affinity for α1 adrenergic receptors, M3 muscarinic receptors, or histamine receptors. Interestingly, the actions of venlafaxine become unpredictable because it can act through multiple targets, which can elicit results ranging from a decrease in salivary secretion to alterations in salivary composition.<a class="elsevierStyleCrossRefs" href="#bib13">13,21</a> Although antidepressant medications do not seem to block saliva production, they interfere with the binding of acetylcholine to M3 receptors. Thus, saliva is produced, but it cannot be excreted.<a class="elsevierStyleCrossRef" href="#bib12">12</a> Compared with the control groups (C30), the increase in CV values in the parotid glands of rats that received antidepressants for 30 days (groups F30 and V30) appeared to represent acinar and ductal cell hypertrophy. Serous cell hypertrophy, which is characterized by widened acinar cells and secretory granule accumulation, has previously been reported following the chronic use of psychotropic drugs.<a class="elsevierStyleCrossRefs" href="#bib12">12,26</a></p><p id="para300" class="elsevierStylePara elsevierViewall">The present study showed the anticholinergic effects of chronic fluoxetine and venlafaxine administration for 30 days . With 60-day treatment, the SSFR reduction was not significantly different than the control group. Studies have shown that the prolonged use of psychotropics causes alterations in receptor sensitivity.<a class="elsevierStyleCrossRef" href="#bib24">24</a> In addition, therapeutic effects and side effects gradually decrease after continuous or repeated psychotropic administration, which may cause desensitization, resistance, or tolerance. Physiological adaptation may also occur, and many side effects of drugs tend to diminish over time despite continuous use of a drug.<a class="elsevierStyleCrossRef" href="#bib27">27</a> Therefore, the least pronounced SSFR decrease in rats treated for 60 days may be a consequence of tolerance or adaptation to psychotropic drugs.</p><p id="para310" class="elsevierStylePara elsevierViewall">The absence of a significant difference in the mean SSFR values among the C60, FS60, and VS60 groups suggested that the normal SSFR of the rats was re-established 30 days after suspending the medication (<a class="elsevierStyleCrossRef" href="#tbl3">Table 3</a>). These data must be carefully analyzed, however, because a decrease in SSFR greater than 50% brings relevant prejudicial consequences (C60 – 0.052 mL/min; VS60 – 0.020 mL/min).</p><p id="para320" class="elsevierStylePara elsevierViewall">SSFR reduction in rats undergoing chronic treatment with fluoxetine may still be an indirect consequence of serotonin action at the 5-HT (5-hydroxytryptamine) receptors present in peripheral microcirculation. Indeed, fluoxetine increases serotonin availability, and serotonin may bind to 5-HT receptors, which would alter the blood flow in the salivary glands and, consequently, the quantity and composition of the salivary flow.<a class="elsevierStyleCrossRef" href="#bib28">28</a></p><p id="para330" class="elsevierStylePara elsevierViewall">In the present study, pilocarpine exerted a significant secretagogue effect, which showed its cholinergic agonist capacity and corroborated the findings of Davies and Shorthose.<a class="elsevierStyleCrossRef" href="#bib29">29</a> Pilocarpine was associated with an increase in SSFR and efficiently treated the hyposalivation caused by venlafaxine (groups VS60 and VP60). Conversely, when pilocarpine was used in association with fluoxetine (group FP60), there was no SSFR increase compared with the group that did not receive pilocarpine (group FS60 – <a class="elsevierStyleCrossRef" href="#tbl3">Table 3</a>). Pilocarpine is a parasympathomimetic agent that acts as a nonselective muscarinic receptor agonist.<a class="elsevierStyleCrossRefs" href="#bib30">30,31</a> Thus, pilocarpine promotes stimulation of the exocrine glands and salivary secretion, which is efficient for patients without extensive glandular parenchymal destruction.<a class="elsevierStyleCrossRef" href="#bib30">30</a></p><p id="para340" class="elsevierStylePara elsevierViewall">In the present study, chronic administration of either fluoxetine or venlafaxine for 30 days was associated with an increase in the number of myoepithelial cells in the parotid glands of rats. These results contradict Grégio et al.<a class="elsevierStyleCrossRef" href="#bib12">12</a> who suggested that the hyposalivation and serous cell hypertrophy observed after chronic treatment with benzodiazepines and antidepressants in rats could be explained by a decrease in the number of myoepithelial cells.<a class="elsevierStyleCrossRef" href="#bib12">12</a> We hypothesized that a deficit in saliva elicits a compensatory activity that increases the number of myoepithelial cells, which have contractile functions, to assist in releasing the retained saliva. The myoepithelial cells accelerate the initial saliva emptying flow rate and promote the drainage of any adjacent extracellular fluid. The dendrites of the myoepithelial cells fold around the duct system, and their function is to compress the acinar and ductal cells.<a class="elsevierStyleCrossRefs" href="#bib16">16,17</a></p><p id="para350" class="elsevierStylePara elsevierViewall">The parenchymatous cells (i.e., acinar, myoepithelial, and ductal) show a proliferative potential for maintenance and regeneration of the adult parenchymatous cell population in normal glands. In addition, parenchymatous cells show a proliferative capacity when submitted to physical injury, such as ductal obstruction.<a class="elsevierStyleCrossRefs" href="#bib19">19,20,32,33</a></p><p id="para360" class="elsevierStylePara elsevierViewall">This study was performed because there were no immunohistochemical studies of myoepithelial, acinar and ductal cells following the use of psychotropic drugs. There have been immunohistochemical studies on the proliferative capacity of parenchymatous cells in induced glandular atrophy,<a class="elsevierStyleCrossRefs" href="#bib19">19,22,23,33</a> and a comparative analysis between the present study and the studies of induced glandular atrophy may be established. Interestingly, an animal model of induced atrophy of the parotid gland's main duct did not prevent the gland from producing saliva. This saliva, however, was not excreted due to a physical obstruction in the main excretory duct. In an animal model of chronic antidepressant administration, we suggested that the saliva was continuously produced, but it was not secreted because of neurochemical interference from the psychotropic drugs. In animal models submitted to injuries (physical and neurochemical), there were significant increases in the number of myoepithelial cells.<a class="elsevierStyleCrossRefs" href="#bib22">22,23,33</a></p><p id="para370" class="elsevierStylePara elsevierViewall">Because calponin is not a cellular proliferation marker, this study determined the numerical index of positively stained cells for calponin, which specifically identifies the myoepithelial cells in the glandular parenchyma. Due to the methodology that was employed, it was not possible to directly infer the cell proliferation, but it was possible to suggest that there was an alteration in the myoepithelial cellular proliferation rate among the studied groups.</p><p id="para380" class="elsevierStylePara elsevierViewall">In the groups of rats treated for 30 days, venlafaxine (V30) seemed to induce an increase in acinar and ductal cell proliferation compared with saline (control group). In an attempt to compensate for the significant SSFR reduction that resulted from the chronic use of venlafaxine (V30), mitoses may have occurred to create new acini and ducts (<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>). The intense proliferative capacity of acinar and ductal cells has already been reported in studies of glandular atrophy induced by obstruction.<a class="elsevierStyleCrossRef" href="#bib19">19</a> Moreover, the V30 group showed the highest mean CV value, which suggested the presence of cellular hypertrophy. It is worth emphasizing that there is a critical size for each cell, above which the stimulus for hypertrophy does not cause adaptative reactions, and the cell goes through mitosis to compensate for the excessive cytoplasm.<a class="elsevierStyleCrossRef" href="#bib34">34</a> We believe that the proliferative capacity of the acinar and ductal cells and the presence of cellular hypertrophy may have contributed to the increase in the mean value of positively stained cells for PCNA in the V30 group.</p><p id="para390" class="elsevierStylePara elsevierViewall">For the groups treated for 60 days, there were not any significant differences in PCNA. Generally, chronic use of antidepressants has not been associated with significant aggression to the acinar and ductal cells. We believe that the proliferative potential of acinar and ductal cells assists in maintaining and regenerating the adult parenchymatous cellular population.</p><p id="para400" class="elsevierStylePara elsevierViewall">Although rat models have some limitations, diseases and/or therapeutic simulations in animal models are important tools for examining disease prognoses and investigating the side effects of drugs.</p></span><span id="cesec80" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle140">CONCLUSIONS</span><p id="para410" class="elsevierStylePara elsevierViewall">The number of positively stained cells for C was shown to be increased with the chronic use of venlafaxine or fluoxetine. The proliferation index of the epithelial cells of rat parotid glands, however, was not altered by the use of antidepressants for 60 days.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:8 [ 0 => array:2 [ "identificador" => "xpalclavsec1582748" "titulo" => "KEYWORDS" ] 1 => array:2 [ "identificador" => "cesec10" "titulo" => "INTRODUCTION" ] 2 => array:3 [ "identificador" => "cesec20" "titulo" => "MATERIALS AND METHODS" "secciones" => array:1 [ 0 => array:2 [ "identificador" => "cesec30" "titulo" => "Statistical analysis" ] ] ] 3 => array:3 [ "identificador" => "cesec40" "titulo" => "RESULTS" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "cesec50" "titulo" => "Groups treated for 30 days" ] 1 => array:2 [ "identificador" => "cesec60" "titulo" => "Groups treated for 60 days" ] ] ] 4 => array:2 [ "identificador" => "cesec70" "titulo" => "DISCUSSION" ] 5 => array:2 [ "identificador" => "cesec80" "titulo" => "CONCLUSIONS" ] 6 => array:2 [ "identificador" => "xack639500" "titulo" => "ACKNOWLEDGEMENTS" ] 7 => array:1 [ "titulo" => "REFERENCES" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2011-03-10" "fechaAceptado" => "2011-05-23" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "KEYWORDS" "identificador" => "xpalclavsec1582748" "palabras" => array:5 [ 0 => "Antidepressants" 1 => "Immunohistochemistry" 2 => "Salivary glands" 3 => "Rats" 4 => "Saliva" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:2 [ "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">OBJECTIVES:</span><p id="spara110" class="elsevierStyleSimplePara elsevierViewall">To evaluate the effects of antidepressants and pilocarpine on the quantity of myoepithelial cells and on the proliferation index of the epithelial cells of rat parotid glands.</p></span> <span id="ceabs20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">INTRODUCTION:</span><p id="spara120" class="elsevierStyleSimplePara elsevierViewall">Hyposalivation, xerostomia, and alterations in saliva composition are important clinical side effects related to the use of antidepressants.</p></span> <span id="ceabs30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">METHODS:</span><p id="spara130" class="elsevierStyleSimplePara elsevierViewall">Ninety male Wistar rats were allocated to nine groups. The control groups received saline for 30 (group C30) or 60 days (group C60) or pilocarpine for 60 days (group Pilo). The experimental groups were administered fluoxetine (group F30) or venlafaxine for 30 days (group V30); fluoxetine (group FS60) or venlafaxine (group VS60) with saline for 60 days; or fluoxetine (group FP60) or venlafaxine (group VP60) with pilocarpine for 60 days. Parotid gland specimens were processed, and the immunohistochemical expression of calponin and proliferating cell nuclear anti-antigen on the myoepithelial and parenchymal cells, respectively, was evaluated. Analysis of variance (ANOVA), Tukey HSD and Games-Howell tests were applied to detect differences among groups (<span class="elsevierStyleItalic">p</span><0.05).</p></span> <span id="ceabs40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle40">RESULTS:</span><p id="spara140" class="elsevierStyleSimplePara elsevierViewall">Compared with the controls, chronic exposure to antidepressants was associated with an increase in the number of positively stained cells for calponin. In addition, venlafaxine administration for 30 days was associated with an increase in the number of positively stained cells for proliferating cell nuclear anti-antigen. Fluoxetine and pilocarpine (group FP60) induced a significant decrease in the number of positively stained cells for calponin compared with all other groups.</p></span> <span id="ceabs50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle50">CONCLUSIONS:</span><p id="spara150" class="elsevierStyleSimplePara elsevierViewall">The number of positively stained cells for calponin increased after chronic administration of antidepressants. The proliferation index of the epithelial cells of rat parotid glands was not altered by the use of antidepressants for 60 days.</p></span>" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "ceabs10" "titulo" => "OBJECTIVES:" ] 1 => array:2 [ "identificador" => "ceabs20" "titulo" => "INTRODUCTION:" ] 2 => array:2 [ "identificador" => "ceabs30" "titulo" => "METHODS:" ] 3 => array:2 [ "identificador" => "ceabs40" "titulo" => "RESULTS:" ] 4 => array:2 [ "identificador" => "ceabs50" "titulo" => "CONCLUSIONS:" ] ] ] ] "multimedia" => array:7 [ 0 => array:7 [ "identificador" => "fig1" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 297 "Ancho" => 447 "Tamanyo" => 49306 ] ] "descripcion" => array:1 [ "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Rat parotid gland with normal parenchyma. Immunohistochemical staining of PCNA on epithelial cells (C60, original magnification 400X).</p>" ] ] 1 => array:7 [ "identificador" => "fig2" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 297 "Ancho" => 447 "Tamanyo" => 44295 ] ] "descripcion" => array:1 [ "en" => "<p id="spara20" class="elsevierStyleSimplePara elsevierViewall">Immunohistochemical staining of PCNA on epithelial cells (FP60, original magnification 400X).</p>" ] ] 2 => array:7 [ "identificador" => "fig3" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 297 "Ancho" => 447 "Tamanyo" => 53060 ] ] "descripcion" => array:1 [ "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Immunohistochemical staining of calponin on myoepithelial cells (Pilo, original magnification 400X).</p>" ] ] 3 => array:7 [ "identificador" => "fig4" "etiqueta" => "Figure 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 297 "Ancho" => 447 "Tamanyo" => 51993 ] ] "descripcion" => array:1 [ "en" => "<p id="spara40" class="elsevierStyleSimplePara elsevierViewall">Immunohistochemical staining of calponin on myoepithelial cells (V30, original magnification 400X).</p>" ] ] 4 => array:7 [ "identificador" => "tbl1" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:3 [ "leyenda" => "<p id="spara60" class="elsevierStyleSimplePara elsevierViewall">N = sample size.</p>" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col">Group \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">N \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">Drugs \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">Period of treatment (days) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">Dose \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">Administration \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">1- C30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Saline \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.1 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intraperitoneal \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">2- C60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Saline \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.1 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intraperitoneal \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">3- Pilo \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Pilocarpine<a class="elsevierStyleCrossRef" href="#tfn2">1</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.05 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Topical \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">4- F30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Fluoxetine<a class="elsevierStyleCrossRef" href="#tfn3">2</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">20 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">5- V30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Venlafaxine<a class="elsevierStyleCrossRef" href="#tfn4">3</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">40 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">6- FS60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Fluoxetine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">20 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Saline \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">31-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.1 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intraperitoneal \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">7- VS60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Venlafaxine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">40 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Saline \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">31-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.1 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intraperitoneal \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">8- FP60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Fluoxetine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">20 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Fluoxetine + Pilocarpine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">31-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">20 mg/kg/0.05 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular and Topical \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">9- VP60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Venlafaxine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">1-30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">40 mg/kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">Intramuscular \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">Venlafaxine + Pilocarpine \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">31-60 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">40 mg/kg/0.05 mL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">Intramuscular and Topical \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] "notaPie" => array:3 [ 0 => array:3 [ "identificador" => "tfn2" "etiqueta" => "1" "nota" => "<p class="elsevierStyleNotepara" id="cenpara10">Gel base prepared with 1% pilocarpine hydrochloride (Gerbras Química e Farmacêutica Ltda., São Paulo, Brazil).</p>" ] 1 => array:3 [ "identificador" => "tfn3" "etiqueta" => "2" "nota" => "<p class="elsevierStyleNotepara" id="cenpara20">Injectable fluoxetine (20040625, Galena Química e Farmacêutica Ltda., Campinas, Brazil).</p>" ] 2 => array:3 [ "identificador" => "tfn4" "etiqueta" => "3" "nota" => "<p class="elsevierStyleNotepara" id="cenpara30">Injectable venlafaxine (D/VN/002/02, Galena Química e Farmacêutica Ltda., Campinas, Brazil).</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara50" class="elsevierStyleSimplePara elsevierViewall">Control and experimental groups according to the drugs used.</p>" ] ] 5 => array:7 [ "identificador" => "tbl2" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:3 [ "leyenda" => "<p id="spara80" class="elsevierStyleSimplePara elsevierViewall">SSFR – stimulated salivary flow rate; CV – cellular volume; PCNA – proliferating cell nuclear antigen; C – calponin.</p>" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col">Groups \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">C30</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">F30</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">V30</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col"><span class="elsevierStyleItalic">p-</span>value \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">SSFR (mL/min)<a class="elsevierStyleCrossRef" href="#tfn5">δ</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.051±0.026 <a class="elsevierStyleCrossRef" href="#tfn7">a,b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.014 ± 0.006 <a class="elsevierStyleCrossRef" href="#tfn7">a</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.026 ± 0.022 <a class="elsevierStyleCrossRef" href="#tfn7">b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.001<a class="elsevierStyleCrossRef" href="#tfn8">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">CV (mm<span class="elsevierStyleSup">3</span>)<a class="elsevierStyleCrossRef" href="#tfn5">δ</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">6,965.683±3,792.951<a class="elsevierStyleCrossRef" href="#tfn7">a,b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">10,384.311±4,869.539<a class="elsevierStyleCrossRef" href="#tfn7">a</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">11,945.927±7,891.179<a class="elsevierStyleCrossRef" href="#tfn7">b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.000<a class="elsevierStyleCrossRef" href="#tfn8">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">PCNA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">55.8±14.382 <a class="elsevierStyleCrossRef" href="#tfn7">a</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">59.4±16.900 <a class="elsevierStyleCrossRef" href="#tfn7">b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">89.5±16.400 <a class="elsevierStyleCrossRef" href="#tfn7">a,b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.000<a class="elsevierStyleCrossRef" href="#tfn8">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top" style="border-bottom: 2px solid black">C \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">13.9±2.644 <a class="elsevierStyleCrossRef" href="#tfn7">a,b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">20±4.216 <a class="elsevierStyleCrossRef" href="#tfn7">a</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">19.8±5.007 <a class="elsevierStyleCrossRef" href="#tfn7">b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">0.003<a class="elsevierStyleCrossRef" href="#tfn8">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] "notaPie" => array:3 [ 0 => array:3 [ "identificador" => "tfn5" "etiqueta" => "δ" "nota" => "<p class="elsevierStyleNotepara" id="cenpara40">Values obtained from the study by da Silva et al. (2009)<a class="elsevierStyleCrossRef" href="#bib15">15</a>.</p>" ] 1 => array:3 [ "identificador" => "tfn7" "etiqueta" => "a,b" "nota" => "<p class="elsevierStyleNotepara" id="cenpara50">Groups followed by the same letter differed statistically from each other.</p>" ] 2 => array:3 [ "identificador" => "tfn8" "etiqueta" => "∗" "nota" => "<p class="elsevierStyleNotepara" id="cenpara60">Statistically significant difference among groups (<span class="elsevierStyleItalic">p</span><0.05).</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara70" class="elsevierStyleSimplePara elsevierViewall">Mean values (X) and standard deviations (SD) of the studied variables in the groups treated for 30 days with saline (C30), fluoxetine (F30), or venlafaxine (V30).</p>" ] ] 6 => array:7 [ "identificador" => "tbl3" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:3 [ "leyenda" => "<p id="spara100" class="elsevierStyleSimplePara elsevierViewall">SSFR – stimulated salivary flow rate; CV – cellular volume; PCNA – proliferating cell nuclear antigen; C – calponin.</p>" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col">Groups \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">C60</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">PILO</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">FS60</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">VS60</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">FP60</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">VP60</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col"><span class="elsevierStyleItalic">p</span>- value \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">X \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="top" scope="col">SD \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">SSFR (mL/min) <a class="elsevierStyleCrossRef" href="#tfn9">δ</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.052±0.029</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.067±0.028 <a class="elsevierStyleCrossRef" href="#tfn11">a,b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.036±0.017</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.020±0.004 <a class="elsevierStyleCrossRef" href="#tfn11">a,c</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.034±0.014 <a class="elsevierStyleCrossRef" href="#tfn11">b</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">0.055± 0.026 <a class="elsevierStyleCrossRef" href="#tfn11">c</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.000<a class="elsevierStyleCrossRef" href="#tfn12">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">CV (mm<span class="elsevierStyleSup">3</span>) <a class="elsevierStyleCrossRef" href="#tfn9">δ</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">6,505.564± 3,343.475<a class="elsevierStyleCrossRef" href="#tfn11">d</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">5,825.418±1,968.070<a class="elsevierStyleCrossRef" href="#tfn11">ab</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">6,809.347±3,189.246<a class="elsevierStyleCrossRef" href="#tfn11">e</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">7,525.112±3,196.085<a class="elsevierStyleCrossRef" href="#tfn11">ac</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">7,519.797±4,272.808<a class="elsevierStyleCrossRef" href="#tfn11">f</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">10,194.315±4,456.345<a class="elsevierStyleCrossRef" href="#tfn11">b,c,d,e,f</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.000<a class="elsevierStyleCrossRef" href="#tfn12">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">PCNA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">50±17.531</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">46.8±13.506</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">36.7±16.687</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">52.5±18.710</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">52±17.153</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top">43.6±18.007</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.296<a class="elsevierStyleCrossRef" href="#tfn13">ns</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top" style="border-bottom: 2px solid black">C \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">13.6±4.789 <a class="elsevierStyleCrossRef" href="#tfn11">c,f</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">22.1±7.385 <a class="elsevierStyleCrossRef" href="#tfn11">a</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">24.2±7.955 <a class="elsevierStyleCrossRef" href="#tfn11">b,c</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">19.7±4.322 <a class="elsevierStyleCrossRef" href="#tfn11">d</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">7±1.563 <a class="elsevierStyleCrossRef" href="#tfn11">a,b,d,e,f</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " colspan="2" align="center" valign="top" style="border-bottom: 2px solid black">18.2±6.250 <a class="elsevierStyleCrossRef" href="#tfn11">e</a></td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top" style="border-bottom: 2px solid black">0.000<a class="elsevierStyleCrossRef" href="#tfn12">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] "notaPie" => array:4 [ 0 => array:3 [ "identificador" => "tfn9" "etiqueta" => "δ" "nota" => "<p class="elsevierStyleNotepara" id="cenpara70">Values obtained from the study by da Silva et al. (2009)<a class="elsevierStyleCrossRef" href="#bib15">15</a>.</p>" ] 1 => array:3 [ "identificador" => "tfn11" "etiqueta" => "a,b,c,d,e,f" "nota" => "<p class="elsevierStyleNotepara" id="cenpara80">Groups followed by the same letter differed statistically from each other.</p>" ] 2 => array:3 [ "identificador" => "tfn12" "etiqueta" => "∗" "nota" => "<p class="elsevierStyleNotepara" id="cenpara90">Statistically significant difference among the groups (<span class="elsevierStyleItalic">p</span><0.05).</p>" ] 3 => array:3 [ "identificador" => "tfn13" "etiqueta" => "ns" "nota" => "<p class="elsevierStyleNotepara" id="cenpara100">– No statistically significant difference among the groups (<span class="elsevierStyleItalic">p</span>>0.05).</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara90" class="elsevierStyleSimplePara elsevierViewall">Mean values (X) and standard deviations (SD) of the studied variables in the groups treated for 60 days with saline (C60), pilocarpine (Pilo), fluoxetine and saline (FS60), venlafaxine and saline (VS60), fluoxetine and pilocarpine (FP60), or venlafaxine and pilocarpine (VP60).</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec10" "bibliografiaReferencia" => array:34 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Pain, pain, go away: antidepressants and pain management" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => """ RA Sansone \n \t\t\t\t\t\t\t\t """ 1 => """ LA Sansone \n \t\t\t\t\t\t\t\t """ ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Psychiatry (Edgmont)" "fecha" => "2008" "volumen" => "5" "paginaInicial" => "16" "paginaFinal" => "19" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19724772" "web" => "Medline" ] ] ] ] ] ] ] 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This study was supported by CNPq (grant 474790/2004-5).</p>" "vista" => "all" ] ] ] "idiomaDefecto" => "en" "url" => "/18075932/0000006600000009/v1_202212011637/S1807593222019512/v1_202212011637/en/main.assets" "Apartado" => null "PDF" => "https://static.elsevier.es/multimedia/18075932/0000006600000009/v1_202212011637/S1807593222019512/v1_202212011637/en/main.pdf?idApp=UINPBA00004N&text.app=https://www.elsevier.es/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593222019512?idApp=UINPBA00004N" ]
| Year/Month | Html | Total | |
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| 2024 November | 4 | 2 | 6 |
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| 2024 May | 10 | 15 | 25 |
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| 2022 December | 4 | 0 | 4 |
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