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Déficit de alfa-1-antitripsina en España (variantes deficientes PI*S y PI*Z): prevalencia estimada y número de sujetos calculados para cada fenotipo
PI*S and PI*Z alpha 1-antitrypsin deficiency: estimated prevalence and number of deficient subjects in spain
Ignacio Blancoa,
Autor para correspondencia
ignacio.blanco@sespa.princast.es

Sección de Neumología. Servicio de Medicina Interna.Hospital Valle del Nalón.Polígono de Riaño, s/n. 33194 Riaño.Principado de Asturias. España.Correo electrónico
, Enrique Fernández-Bustillob, Frederick J. de Serresc, Daniel Alkassamd, Carmen Rodríguez Menéndeze
a Sección de Neumología. Servicio de Medicina Interna. Hospital Valle del Nalón. Langreo. Principado de Asturias
b Unidad de Bioestadística. Hospital Universitario Central de Asturias. Oviedo. Principado de Asturias
c Laboratory of Molecular Toxicology. Environmental Toxicology Program.National Institute of Environmental Health Sciences. Chapel Hill. North Carolina. EE.UU
d Servicio de Análisis Clínicos. Hospital Valle del Nalón. Langreo. Principado de Asturias
e Servicio de Análisis Clínicos. Instituto Nacional de Silicosis. Hospital Universitario Central de Asturias.Oviedo. Principado de Asturias. España
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        "resumen" => "<span class="elsevierStyleSectionTitle">Fundamento y objetivo</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">El d&#233;ficit de alfa-1-antitripsina &#40;DAAT&#41; es un trastorno hereditario conun riesgo incrementado de padecer enfisema pulmonar y hepatopat&#237;as cr&#243;nicas en ni&#241;os yadultos&#46; Actualmente existe en Espa&#241;a la posibilidad de aplicar tratamiento sustitutivo a pacientescon d&#233;ficit grave que cumplan los requisitos establecidos por el Registro Espa&#241;ol dePacientes con DAAT&#44; por lo que consideramos importante conocer el n&#250;mero de sujetos conDAAT en sus variantes PIS y PIZ y su distribuci&#243;n por fenotipos</p> <span class="elsevierStyleSectionTitle">Sujetos&#44; material y m&#233;todo</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Selecci&#243;n de estudios publicados sobre frecuencias al&#233;licas PIS yPIZ en poblaciones espa&#241;olas&#44; con los siguientes criterios&#58; a&#41; m&#233;todo fiable de identificaci&#243;nde fenotipos&#59; b&#41; no ser estudios de cribado&#59; c&#41; factor de precisi&#243;n estad&#237;stica mayor o igual a 5&#44;y d&#41; muestras representativas de la poblaci&#243;n general de la comunidad</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Se seleccionaron 34 cohortes&#44; que quedaron reducidas a 4 tras eliminar las que nocumplieron los criterios requeridos&#46; Las frecuencias medias &#40;en tanto por 1&#46;000&#41; fueron&#58; 104&#40;intervalo de confianza &#91;IC&#93; del 95&#37;&#44; 96-113&#41; para PI<span class="elsevierStyleSup">&#42;</span>S y 17 &#40;IC del 95&#37;&#44; 14-21&#41; para PI<span class="elsevierStyleSup">&#42;</span>Z&#46;Extrapolando estos datos al total de la poblaci&#243;n&#44; calculamos que habr&#237;a en Espa&#241;a 9&#46;173&#46;181individuos con DAAT &#40;IC del 95&#37;&#44; 9&#46;167&#46;966-9&#46;178&#46;398&#41;&#44; con la siguiente distribuci&#243;n porfenotipos&#58; PIMS&#44; 7&#46;358&#46;263 &#40;IC del 95&#37;&#44; 6&#46;696&#46;222-8&#46;072&#46;328&#41;&#59; PIMZ&#44; 1&#46;222&#46;041 &#40;IC del95&#37;&#44; 972&#46;767-1&#46;539&#46;805&#41;&#59; PISS&#44; 436&#46;023 &#40;IC del 95&#37;&#44; 369&#46;057-514&#46;244&#41;&#59; PISZ&#44; 144&#46;827&#40;IC del 95&#37;&#44; 107&#46;227-195&#46;038&#41;&#44; y PIZZ&#44; 12&#46;026 &#40;IC del 95&#37;&#44; 7&#46;788-18&#46;493&#41;&#46; La prevalenciaglobal calculada del DAAT fue de un deficiente por cada 4&#44;4 sujetos&#44; con la siguiente distribuci&#243;n&#58;PIMS&#44; 1&#47;5&#59; PIMZ&#44; 1&#47;33&#59; PISS&#44; 1&#47;92&#59; PISZ&#44; 1&#47;278&#44; y PIZZ&#44; 1&#47;3&#46;344</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">El DAAT es una enfermedad frecuente e infradiagnosticada</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Background and objective</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Alpha-1-antitrypsin deficiency &#40;AATD&#41; is an hereditary disorder withincreased risk of pulmonary emphysema and chronic liver diseases in children and adults&#46; Sinceit is possible currently in Spain to apply alpha-1-antitrypsin replacement therapy to AATDpatients&#44; the objective of this study was to calculate the total number of subjects affected byPIS and PIZ AATD&#44; and its phenotypic distribution</p> <span class="elsevierStyleSectionTitle">Subjects&#44; material and method</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Selection of published studies on allelic frequencies PIS and PIZaccording to the following criteria&#58; a&#41; alpha-1-antitrypsin phenotyping performed by isoelectrofocusing&#59;b&#41; rejection of &#187;screening studies&#187;&#59; c&#41; statistic precision factor score of 5&#44; and d&#41;samples representative of the Spanish general population</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Four out 34 cohorts were selected&#46; Mean gene frequencies &#40;per 1&#44;000&#41; were&#58; 104&#40;95&#37; confidence interval &#91;CI&#93;&#44; 96-113&#41; for PI<span class="elsevierStyleSup">&#42;</span>S and 17 &#40;95&#37; CI&#44; 14-21&#41; for PI<span class="elsevierStyleSup">&#42;</span>Z&#46; These dataindicated that it would exist in Spain 9&#44;173&#44;181 AATD subjects &#40;95&#37; CI&#44; 9&#44;167&#44;966-9&#44;178&#44;398&#41;&#44; with the following phenotypic distribution&#58; 7&#44;358&#44;263 &#40;95&#37; CI&#44; 6&#44;696&#44;222-8&#44;072&#44;328&#41; for PIMS&#59; 1&#44;222&#44;041 &#40;95&#37; CI&#44; 972&#44;767-1&#44;539&#44;805&#41; for PIMZ&#59; 436&#44;023 &#40;95&#37; CI&#44;369&#44;057-514&#44;244&#41; for PISS&#59; 144&#44;827 &#40;95&#37; CI&#44; 107&#44;227-195&#44;038&#41; for PISZ&#59; and 12&#44;026&#40;95&#37; CI&#44; 7&#44;788-18&#44;493&#41; for PIZZ&#46; The global prevalence was 1 out of 4&#46;4 individuals&#44; with thefollowing distribution&#58; PIMS 1&#47;5&#59; PIMZ 1&#47;33&#59; PISS 1&#47;92&#59; PISZ 1&#47;278&#59; and PIZZ 1&#47;3&#44;344</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">AATD is a frequent but underdiagnosed disease in Spain</p>"
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Información del artículo
ISSN: 00257753
Idioma original: Español
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