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Sex-related bias and exclusion mapping of the nonrecombinant portion of chromosome Y in human type 1 diabetes in the isolated founder population of Sardinia.
Contu, Daniela; Morelli, Laura; Zavattari, Patrizia; Lampis, Rosanna; Angius, Efisio; Frongia, Paola; Murru, Daniela; Maioli, Mario; Francalacci, Paolo; Todd, John A; Cucca, Francesco.
Afiliação
  • Contu D; Dipartimento di Scienze Biomediche e Biotecnologie, Università di Cagliari, Ospedale Microcitemico, Via Jenner, Cagliari 09121, Italy.
Diabetes ; 51(12): 3573-6, 2002 Dec.
Article em En | MEDLINE | ID: mdl-12453916
A male excess in Sardinian type 1 diabetic cases has previously been reported and was largely restricted to those patients carrying the HLA-DR3/nonDR4 genotype. In the present study, we have measured the male- to-female (M:F) ratio in a sample set of 542 newly collected, early-onset type 1 diabetic Sardinian patients. This data not only confirm the excess of male type 1 diabetic patients overall (M:F ratio = 1.3, P = 3.9 x 10(-3)) but also that the bias in male incidence is largely confined to patients with the DR3/nonDR4 genotype (M:F ratio = 1.6, P = 2.0 x 10(-4)). These sex effects could be due to a role for allelic variation of the Y chromosome in the susceptibility to type 1 diabetes, but to date this chromosome has not been evaluated in type 1 diabetes. We, therefore, established the frequencies of the various chromosome Y lineages and haplotypes in 325 Sardinian male patients, which included 180 cases with the DR3/nonDR4 genotype, and 366 Sardinian male control subjects. Our results do not support a significant involvement of the Y chromosome in DR3/nonDR4 type 1 diabetic cases nor in early-onset type 1 diabetes as a whole. Other explanations, such as X chromosome-linked inheritance, are thus required for the male bias in incidence in type 1 diabetes in Sardinia.
Assuntos
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Base de dados: MEDLINE Assunto principal: Cromossomo Y / Mapeamento Cromossômico / Efeito Fundador / Diabetes Mellitus Tipo 1 Tipo de estudo: Incidence_studies / Prognostic_studies Limite: Child / Child, preschool / Female / Humans / Male País como assunto: Europa Idioma: En Ano de publicação: 2002 Tipo de documento: Article
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Base de dados: MEDLINE Assunto principal: Cromossomo Y / Mapeamento Cromossômico / Efeito Fundador / Diabetes Mellitus Tipo 1 Tipo de estudo: Incidence_studies / Prognostic_studies Limite: Child / Child, preschool / Female / Humans / Male País como assunto: Europa Idioma: En Ano de publicação: 2002 Tipo de documento: Article