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RAPID COMMUNICATION
Single-nucleotide polymorphisms of GSK3B, GAB2 and SORL1 in late-onset Alzheimer's disease: interactions with the APOE genotype
Giselle IzzoI, Orestes V. ForlenzaI,IV, Bernardo dos SantosI,III, Paulo H.F. BertolucciII, Elida B. OjopiI, Wagner F. GattazI,IV, Daniel Shikanai KerrI,IV,
Corresponding author
dskerr@gmail.com

Tel.: 55-11-2661-7283
I Faculdade de Medicina da Universidade de São Paulo (Ipq-FMUSP), Department and Institute of Psychiatry), Laboratory of Neuroscience (LIM-27), São Paulo/SP, Brazil.
II Federal University of São Paulo (UNIFESP), Faculty of Medicine, Department of Neurology, Núcleo De Envelhecimento Cerebral (NUDEC), São Paulo/SP, Brazil.
III Universidade de São Paulo, Instituto de Matemática e Estatística (IME), São Paulo/SP, Brazil.
IV Universidade São Paulo, Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), São Paulo/SP, Brazil.
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">INTRODUCTION</span><p id="para10" class="elsevierStylePara elsevierViewall">Alzheimer&#8217;s disease &#40;AD&#41; is a multifactorial neurodegenerative disorder that is caused by the interaction of multiple genetic and environmental factors &#40;<a class="elsevierStyleCrossRef" href="#bib1">1</a>&#41;&#46; In the early stages&#44; Alzheimer&#8217;s disease is clinically characterized by short-term memory impairment&#44; which evolves to widespread cognitive decline and dementia&#46; There is unequivocal evidence that genetic factors contribute to the pathogenesis of Alzheimer&#8217;s disease&#44; including the sporadic form &#40;<a class="elsevierStyleCrossRef" href="#bib2">2</a>&#41;&#46; Currently&#44; apolipoprotein E is the only well-established genetic risk factor for sporadic Alzheimer&#8217;s disease&#44; and the <span class="elsevierStyleItalic">APOE&#8727;4</span> allele has been consistently shown to be associated with an increased risk of Alzheimer&#8217;s disease &#40;<a class="elsevierStyleCrossRefs" href="#bib3">3&#44;4</a>&#41;&#46; There is little doubt that other &#8211; most likely multiple &#8211; polymorphisms play an important role in the pathophysiology of Alzheimer&#8217;s disease&#44; given that the presence of one or even two copies of <span class="elsevierStyleItalic">APOE&#8727;4</span> is neither a necessary nor sufficient condition for developing the disease&#46;</p><p id="para20" class="elsevierStylePara elsevierViewall">Several new single-nucleotide polymorphisms &#40;SNPs&#41; associated with on Alzheimer&#8217;s disease have recently been identified in genome-wide association studies&#44; namely <span class="elsevierStyleItalic">PICALM</span>&#44; <span class="elsevierStyleItalic">CLU&#44; CR1</span> and <span class="elsevierStyleItalic">SORL1</span> &#40;<a class="elsevierStyleCrossRefs" href="#bib5">5-7</a>&#41;&#46; None of these SNPs can be regarded as etiological factors&#59; rather&#44; they serve as susceptibility modifiers&#44; i&#46;e&#46;&#44; factors with independent or additive effects in the interactions among several genetic variants &#40;mostly SNPs&#41; at multiple genomic loci&#46; These variants may not be deleterious per se&#44; but they may modify disease outcomes as a result of direct and indirect interactions with other genetic and environmental factors &#40;<a class="elsevierStyleCrossRefs" href="#bib8">8&#44;9</a>&#41;&#46;</p><p id="para30" class="elsevierStylePara elsevierViewall">Polymorphisms in the <span class="elsevierStyleItalic">SORL1</span>&#44; <span class="elsevierStyleItalic">GAB2</span> and <span class="elsevierStyleItalic">GSK3B</span> genes have been shown to be associated with Alzheimer&#8217;s disease in recent studies&#46; Association studies have yielded conflicting data regarding the role of <span class="elsevierStyleItalic">SORL1</span> rs641120 in Alzheimer&#8217;s disease &#40;<a class="elsevierStyleCrossRefs" href="#bib7">7&#44;10&#44;11-13</a>&#41;&#46; A recent study showed that there were age-dependent differences in <span class="elsevierStyleItalic">SORL1</span> expression and promoter methylation in an AD cohort&#44; with possible implications for the disease &#40;<a class="elsevierStyleCrossRef" href="#bib14">14</a>&#41;&#46; Likewise&#44; two studies suggested that there is an association between <span class="elsevierStyleItalic">GAB2</span> polymorphisms and AD in Caucasians &#40;<a class="elsevierStyleCrossRefs" href="#bib15">15&#44;16</a>&#41;&#44; but other studies failed to confirm this association in European &#40;<a class="elsevierStyleCrossRef" href="#bib17">17</a>&#41; and Asiatic populations &#40;<a class="elsevierStyleCrossRefs" href="#bib12">18&#44;19</a>&#41;&#46; Only one study to date has addressed the association between <span class="elsevierStyleItalic">GSK3B</span> polymorphisms and AD&#59; the results of that study suggest that rs6438552 has a significant effect on disease risk &#40;<a class="elsevierStyleCrossRef" href="#bib20">20</a>&#41;&#46; Therefore&#44; the objective of the present study was to determine the effects of <span class="elsevierStyleItalic">GAB2</span> &#40;rs2373115&#41;&#44; <span class="elsevierStyleItalic">GSK3B</span> &#40;rs6438552&#41; and <span class="elsevierStyleItalic">SORL1</span> &#40;rs641120&#41; polymorphisms on the risk for AD and to investigate the interactions of these SNPs with <span class="elsevierStyleItalic">APOE</span>&#8727;4 in a sample of 201 older Brazilian adults&#46;</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">MATERIALS AND METHODS</span><p id="para40" class="elsevierStylePara elsevierViewall">Subjects were recruited from two university-based memory clinics in Sao Paulo&#44; Brazil&#46; All participants underwent comprehensive clinical and neuropsychological evaluations&#46; The diagnosis of probable AD &#40;n&#8202;&#61;&#8202;130&#44; mean age 77&#177;8&#46;3&#44; 66&#37; females&#41; was established according to the NINCDS-ADRDA criteria &#40;<a class="elsevierStyleCrossRef" href="#bib21">21</a>&#41;&#46; The comparison group included healthy volunteers &#40;n&#8202;&#61;&#8202;71&#44; mean age 71&#46;8&#177;6&#46;7&#59; 79&#37; females&#41; with no signs of cognitive or functional impairment&#46; No relatives of AD patients were included in the control group&#46; No statistically significant differences were observed with respect to the age distribution or self-reported ethnic background between the patients and controls&#44; but there was a greater percentage of females in the control group&#46; However&#44; we believe that this gender difference should not negatively affect the findings&#44; as similar results were obtained in a preliminary analysis of gender-matched samples&#46;</p><p id="para50" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">GSK3B</span>&#44; <span class="elsevierStyleItalic">GAB2</span> and <span class="elsevierStyleItalic">SORL1</span> SNPs were analyzed using a Real-Time PCR SNP genotyping system &#40;<span class="elsevierStyleItalic">TaqMan&#174;</span> Assays &#8211; Applied Biosystems&#44; CA&#44; USA&#41; <span class="elsevierStyleItalic">TaqMan</span> PCR Master Mix 1x&#44; <span class="elsevierStyleItalic">TaqMan</span> SNP genotyping assay 1x&#44; genomic DNA 10 ng&#47;&#956;L and ultrapure water to a volume of 5 &#956;L were mixed in each well of an optical plate&#46; Allelic discrimination was performed using a 7500 Real-Time PCR system &#40;Applied Biosystems&#44; CA&#44; USA&#41; by comparing the fluorescence levels before and after amplification &#40;45 cycles of 15 seconds at 95 &#176;C and 1 min at 60 &#176;C&#41;&#46; Two SNPs &#40;rs7412 and rs429358&#41; were evaluated to determine the <span class="elsevierStyleItalic">APOE</span> genotype&#44; as previously described &#40;<a class="elsevierStyleCrossRef" href="#bib22">22</a>&#41;&#46; The real-time PCR reactions were run using the protocol presented above&#46;</p><p id="para60" class="elsevierStylePara elsevierViewall">Pearson&#39;s Chi-squared test with simulated <span class="elsevierStyleItalic">p</span>-values was used to compare the genotype distributions between cases and controls&#46; The interactions between the <span class="elsevierStyleItalic">GSK3B</span>&#44; <span class="elsevierStyleItalic">GAB2</span> and <span class="elsevierStyleItalic">SORL1</span> SNPs and <span class="elsevierStyleItalic">APOE&#8727;4</span> were tested in two ways&#58; first&#44; each group was stratified into <span class="elsevierStyleItalic">APOE&#8727;4</span>-positive and <span class="elsevierStyleItalic">APOE&#8727;4</span>-negative subgroups&#44; and the association between each SNP and the diagnosis of AD was assessed separately in each group&#46; In the second step&#44; a binomial logistic regression model was used to compare the interactions between <span class="elsevierStyleItalic">APOE&#8727;4</span> and each of the three SNPs in the entire sample&#46; The statistical analysis was conducted using R software version 2&#46;12&#46;2&#46;</p></span><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">RESULTS AND DISCUSSION</span><p id="para70" class="elsevierStylePara elsevierViewall">Our results are consistent with the well-established role of the <span class="elsevierStyleItalic">APOE&#8727;4</span> allele as a risk factor for sporadic AD &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;0001&#41; &#40;<a class="elsevierStyleCrossRef" href="#bib3">3</a>&#44; <a class="elsevierStyleCrossRef" href="#bib5">5</a>&#44; <a class="elsevierStyleCrossRef" href="#bib6">6</a>&#44; <a class="elsevierStyleCrossRefs" href="#bib23">23-25</a>&#41;&#40;7&#41;&#46; Data regarding the genetics of AD in the Brazilian population remain scarce &#40;<a class="elsevierStyleCrossRef" href="#bib26">26</a>&#44; <a class="elsevierStyleCrossRef" href="#bib27">27</a>&#41;&#44; underscoring the importance of our findings&#46; We call attention to the positive association of all the studied SNPs&#44; namely <span class="elsevierStyleItalic">GAB2</span> rs2373115&#44; <span class="elsevierStyleItalic">GSK3B</span> rs6438552 and <span class="elsevierStyleItalic">SORL1</span> rs641120&#44; with AD &#40;<a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>&#41;&#46; The association of the GG genotype of <span class="elsevierStyleItalic">SORL1</span> with AD &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;047&#44; OR&#8202;&#61;&#8202;2&#46;07&#44; CI<span class="elsevierStyleInf">95&#37;</span> &#91;1&#46;17 - 3&#46;68&#93;&#41; was independent of <span class="elsevierStyleItalic">APOE</span>&#44; and the binomial logistic regression analysis showed no interaction effect between <span class="elsevierStyleItalic">APOE&#8727;4</span> and any of the <span class="elsevierStyleItalic">SORL1</span> genotypes &#40;<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#41;&#46; We conclude that <span class="elsevierStyleItalic">SORL1</span> has an independent role in AD&#44; irrespective of the presence of the <span class="elsevierStyleItalic">APOE&#8727;4</span> allele&#46;</p><elsevierMultimedia ident="tbl1"></elsevierMultimedia><elsevierMultimedia ident="tbl2"></elsevierMultimedia><p id="para80" class="elsevierStylePara elsevierViewall">We found a positive association between the GG genotype of <span class="elsevierStyleItalic">GAB2</span> &#40;rs2373115&#41; and the diagnosis of AD &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;021&#44; OR&#8202;&#61;&#8202;1&#46;8&#44; CI95&#37; &#91;1&#46;01-3&#46;18&#93;&#41;&#46; This genotype was associated with a greater odds ratio &#40;OR&#41; for AD in the <span class="elsevierStyleItalic">APOE&#8727;4</span> carriers &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;006&#44; OR&#8202;&#61;&#8202;5&#46;08&#44; CI<span class="elsevierStyleInf">95&#37;</span> &#91;1&#46;45-18&#46;98&#93;&#41;&#46; We further used logistic regression to investigate the interaction between the <span class="elsevierStyleItalic">APOE&#8727;4</span> and <span class="elsevierStyleItalic">GAB2</span> polymorphisms &#40;GG vs&#46; non-GG genotypes&#44; given the small proportion of individuals with the TT genotype in our sample&#41;&#44; and we observed a robust increase in the effect as a result of the interaction between <span class="elsevierStyleItalic">GAB2</span> GG and <span class="elsevierStyleItalic">APOE&#8727;4</span> &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;014&#44; OR<span class="elsevierStyleInf">interaction</span>&#8202;&#61;&#8202;7&#46;95&#44; OR<span class="elsevierStyleInf">main</span>&#8202;&#61;&#8202;1&#46;44&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#41;&#46;</p><p id="para90" class="elsevierStylePara elsevierViewall">With respect to the association between the <span class="elsevierStyleItalic">GSK3B</span> polymorphism &#40;rs6438552&#41; and AD diagnosis&#44; we found that the GG genotype was approximately twice as common in the AD group &#40;28&#46;8&#37;&#41; than in the controls &#40;13&#46;8&#37;&#41; and that this genotype had a significant effect on the OR &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;018&#44; OR&#8202;&#61;&#8202;2&#46;48&#44; CI<span class="elsevierStyleInf">95&#37;</span> &#91;1&#46;19-5&#46;20&#93;&#41;&#46; Interestingly&#44; this effect was even more pronounced in the absence of <span class="elsevierStyleItalic">APOE&#8727;4</span> &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;003&#44; OR&#8202;&#61;&#8202;4&#46;45&#44; CI<span class="elsevierStyleInf">95&#37;</span> &#91;1&#46;47-16&#46;39&#93;&#41;&#46; In contrast&#44; the A allele was associated with a protective effect&#44; irrespective of the <span class="elsevierStyleItalic">APOE</span> status &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;018&#44; OR&#8202;&#61;&#8202;0&#46;40&#44; CI<span class="elsevierStyleInf">95&#37;</span> &#91;0&#46;19-0&#46;84&#93;&#41;&#59; however&#44; the logistic regression analysis showed that <span class="elsevierStyleItalic">APOE&#8727;4</span>-positive carriers of the AA genotype displayed an increased OR for AD &#40;<span class="elsevierStyleItalic">p</span>&#8202;&#61;&#8202;0&#46;024&#44; OR<span class="elsevierStyleInf">interaction</span>&#8202;&#61;&#8202;1&#46;10&#44; OR<span class="elsevierStyleInf">main</span>&#8202;&#61;&#8202;0&#46;19&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#41;&#46; This finding is noteworthy because it indicates that the A allele of the <span class="elsevierStyleItalic">GSK3B</span> gene may represent either a protective factor or a risk factor for AD&#44; depending on the <span class="elsevierStyleItalic">APOE</span> genotype&#46; We speculate that this dual role may occur because the rs6438552 polymorphism is intronic and may affect the transcription and splicing of <span class="elsevierStyleItalic">GSK3B</span>&#46; In fact&#44; splice variants of <span class="elsevierStyleItalic">GSK3B</span> arising from the AA genotype have been shown to favor Tau protein hyperphosphorylation&#44; which is one of the pathological hallmarks of AD &#40;<a class="elsevierStyleCrossRef" href="#bib28">28</a>&#41;&#46;</p><p id="para100" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">APOE&#8727;4</span> is involved in the abnormal cleavage of the amyloid-precursor protein &#40;APP&#41;&#44; leading to the accumulation of the amyloid-beta peptide&#44; which in turn favors the hyperphosphorylation of Tau&#46; These pathological changes ultimately disrupt axonal transport and neuronal viability &#40;<a class="elsevierStyleCrossRef" href="#bib29">29</a>&#44; <a class="elsevierStyleCrossRef" href="#bib30">30</a>&#41;&#46; <span class="elsevierStyleItalic">GAB2</span> and <span class="elsevierStyleItalic">GSK3B</span> &#40;rs6438552&#44; AA genotype&#41; have been shown to increase Tau phosphorylation &#40;<a class="elsevierStyleCrossRef" href="#bib15">15</a>&#44; <a class="elsevierStyleCrossRef" href="#bib28">28</a>&#41;&#46; The studied <span class="elsevierStyleItalic">GSK3B</span> and <span class="elsevierStyleItalic">GAB2</span> polymorphisms are located in intronic regions of these genes and may thus have subtle effects on transcription&#44; with biological consequences that are yet to be defined&#46; It is also possible that these SNPs are in linkage disequilibrium with other polymorphisms that may contribute to the observed effects&#46; GAB2 is a scaffolding protein with important roles in several growth and differentiation signaling pathways&#44; including the phosphorylation of kinases that participate in core neurobiological pathways related to AD &#40;<a class="elsevierStyleCrossRefs" href="#bib15">15&#44;16&#44;31&#44;32</a>&#41;&#46; GAB2 and presenilin 1 both activate PI3K&#44; leading to the activation of PKB and the further inactivation of GSK3B &#40;<a class="elsevierStyleCrossRef" href="#bib33">33</a>&#41;&#46; Because the inactivation of GSK3B prevents Tau hyperphosphorylation in neurons &#40;<a class="elsevierStyleCrossRef" href="#bib34">34</a>&#41;&#44; it is reasonable to assume that any decrease in <span class="elsevierStyleItalic">GAB2</span> expression and&#47;or function would increase Tau phosphorylation &#40;<a class="elsevierStyleCrossRef" href="#bib15">15</a>&#41;&#46; Supporting this hypothesis&#44; <span class="elsevierStyleItalic">in vitro</span> studies have shown that the inhibition of <span class="elsevierStyleItalic">GAB2</span> expression using siRNA increases Tau phosphorylation &#40;<a class="elsevierStyleCrossRef" href="#bib15">15</a>&#41;&#46;</p><p id="para110" class="elsevierStylePara elsevierViewall">We conclude that interactions between the <span class="elsevierStyleItalic">GAB2</span> and <span class="elsevierStyleItalic">GSK3B</span> polymorphisms and the well-established genetic factor <span class="elsevierStyleItalic">APOE</span> may modify the overall risk of AD&#46; These effects are by no means linear or cumulative&#44; given that the protective effect of a one studied polymorphism &#40;e&#46;g&#46;&#44; the AA genotype of <span class="elsevierStyleItalic">GSK3B</span>&#41; may increase the odds ratio for AD in the presence of <span class="elsevierStyleItalic">APOE&#8727;4</span>&#46; Our results support the hypothesis that there is no single genetic cause for late-onset AD&#59; instead&#44; the development of AD depends on the interaction of several genes&#44; environmental factors and age&#46; Further evaluation of the interactions between distinct genes and of the respective implications on neuronal homeostasis may provide insight into the complex neurobiology of AD&#46;</p></span></span>"
    "textoCompletoSecciones" => array:1 [
      "secciones" => array:5 [
        0 => array:2 [
          "identificador" => "cesec10"
          "titulo" => "INTRODUCTION"
        ]
        1 => array:2 [
          "identificador" => "cesec20"
          "titulo" => "MATERIALS AND METHODS"
        ]
        2 => array:2 [
          "identificador" => "cesec30"
          "titulo" => "RESULTS AND DISCUSSION"
        ]
        3 => array:2 [
          "identificador" => "xack639462"
          "titulo" => "ACKNOWLEDGMENTS"
        ]
        4 => array:1 [
          "titulo" => "REFERENCES"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "tieneResumen" => true
    "resumen" => array:1 [
      "en" => array:1 [
        "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><p id="spara40" class="elsevierStyleSimplePara elsevierViewall">In this study&#44; we investigated the associations between single-nucleotide polymorphisms in <span class="elsevierStyleItalic">GAB2</span> &#40;rs2373115&#41;&#44; <span class="elsevierStyleItalic">GSK3B</span> &#40;rs6438552&#41; and <span class="elsevierStyleItalic">SORL1</span> &#40;rs641120&#41; and Alzheimer&#8217;s disease &#40;AD&#41;&#44; both alone and in combination with the <span class="elsevierStyleItalic">APOE&#8727;4</span> allele&#46;</p></span>"
      ]
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    "NotaPie" => array:1 [
      0 => array:1 [
        "nota" => "<p class="elsevierStyleNotepara" id="cenpara20">No potential conflict of interest was reported&#46;</p> <p class="elsevierStyleNotepara" id="cenpara30">All authors contributed to the present work and consent to the publication of the findings&#46; Gattaz WF and Ojopi EB were responsible for the initial concept&#46; The patients were recruited by Bertolucci PHF&#44; Forlenza OV and Gattaz WF&#46; The experimental analyses were performed by Izzo G and Kerr DS&#46; The statistical analyses were performed by Santos B and Kerr DS&#46; Izzo G wrote the first draft of the manuscript&#46; The literature review was performed by by Izzo G and Kerr DS&#46; The manuscript was prepared and formatted and the tables were prepared by Kerr DS and Forlenza OV&#46; All authors have reviewed and approved the final manuscript&#46;</p>"
      ]
    ]
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      0 => array:7 [
        "identificador" => "tbl1"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
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          "leyenda" => "<p id="spara20" class="elsevierStyleSimplePara elsevierViewall">The OR for <span class="elsevierStyleItalic">APOE</span> was calculated by comparing <span class="elsevierStyleItalic">APOE&#8727;4</span> carriers with non-carriers&#46; The ORs for other genes compared the homozygous risk allele genotype with the remaining cohort &#40;e&#46;g&#46;&#44; GG vs&#46; GT &#43; TT&#41;&#46;</p>"
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                  <table border="0" frame="\n
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                  \t\t\t\t" scope="col">Gene&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col">DbSNP rs ID&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col">Risk Allele&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col">Freq&#46; Cases&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col">Freq&#46; Controls&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col">OR &#40;95&#37; CI&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">3&#46;33 &#40;1&#46;73-6&#46;63&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">1&#46;79 &#40;1&#46;01-3&#46;18&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">0&#46;021&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&#46;08 &#40;1&#46;45-18&#46;98&#41;&nbsp;\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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;006&nbsp;\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
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                  \t\t\t\t">&nbsp;\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
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleItalic">APOE</span>&#8727;4-&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">1&#46;10 &#40;0&#46;51-2&#46;35&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">G&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#46;44&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">2&#46;48 &#40;1&#46;19-5&#46;20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;018&nbsp;\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">&nbsp;\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">&nbsp;\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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">APOE</span>&#8727;4&#43;&nbsp;\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">&nbsp;\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">&nbsp;\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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;76 &#40;0&#46;22-2&#46;88&#41;&nbsp;\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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;768&nbsp;\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">&nbsp;\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">&nbsp;\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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">APOE</span>&#8727;4-&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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              "nota" => "<p class="elsevierStyleNotepara" id="cenpara10"><span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#46; The OR interaction values were obtained by logistic regression evaluating the interaction between <span class="elsevierStyleItalic">APOE</span>&#8727;4 and the given genotype&#46; &#8225; Because there were very few individuals who were homozygous for the T allele&#44; this interaction was discarded&#46;</p>"
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          "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Logistic regression analysis of the risk genotype for <span class="elsevierStyleItalic">LOAD</span> in <span class="elsevierStyleItalic">APOE&#8727;4</span> individuals&#46;</p>"
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      ]
    ]
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