title: [Polymorphism of gene encoding vascular angiotensin II receptor and microangiopathies in patients with insulin-dependent diabetes mellitus].
abstract: Polymorphism A1166C of the AT1R gene encoding angiotensin vascular receptor [replacement of C (cytosine) for A (adenine)) at position 1166] was compared in patients with insulin-dependent diabetes mellitus (IDDM) complicated by diabetic nephropathy (DN) and in noncomplicated patients (n = 27 and n = 41, respectively) and also in patients with IDDM complicated by diabetic retinopathy (DR) and in correspondent noncomplicated individuals (n = 30 and n = 44, respectively). The frequency of AT1R gene alleles and genotypes in patients with IDDM complicated by DN did not differ significantly from that observed in patients with noncomplicated IDDM. In contrast, in patients with IDDM complicated by retinopathy, a significant decrease in the content of A allele (68.3% against 82.6%) and a significant increase in the content of C allele (31.7% against 17.4%) was found as compared with the control group. Thus, in the Moscow population, A1166C polymorphism of the AT1R gene is not associated with diabetic renal complications but indeed associated with diabetic retinal complications. C allele is a risk factor of DR (the relative risk, RR, is equal to 2.17), and A allele is, in contrast, a protective factor against early retinopathy development (RR is equal to 0.49).
authors.affiliation: State Research Institute of Genetics and Selection of Industrial Microorganisms, Moscow, Russia.
authors.forename: D A
authors.initials: DA
authors.lastname: Chistiakov
authors.forename: L A
authors.initials: LA
authors.lastname: Chugunova
authors.forename: M Sh
authors.initials: MSh
authors.lastname: Shamkhalova
authors.forename: M V
authors.initials: MV
authors.lastname: Shestakova
authors.forename: T M
authors.initials: TM
authors.lastname: Milen'kaia
authors.forename: I I
authors.initials: II
authors.lastname: Dedov
authors.forename: V G
authors.initials: VG
authors.lastname: Debabov
authors.forename: V V
authors.initials: VV
authors.lastname: Nosikov
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics* / Q000503:physiopathology; D003928:Diabetic Nephropathies / Q000235:genetics; D003930:Diabetic Retinopathy / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D011945:Receptors, Angiotensin / Q000235:genetics*
chemical_list: D011945:Receptors, Angiotensin
vernacular_title: Polimorfizm gena sosudistogo receptora angiotenzina II i mikroangiopatii pri insulinzavisimom sakharnom diabete.