WFRF:(Tuomi TiinaMaija)
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Autoimmunity to CD38 and GAD in Type I and Type II diabetes: CD38 and HLA genotypes and clinical phenotypes
- Antonelli, A (författare)
-
- Tuomi, Tiinamaija (författare)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
- Nannipieri, M (författare)
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- Fallahi, P (författare)
- Nesti, C (författare)
- Okamoto, H (författare)
- Ferrannini, E (författare)
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- (creator_code:org_t)
- 2002-07-24
- 2002
- Engelska.
- Ingår i: Diabetologia. - : Springer Science and Business Media LLC. - 1432-0428 .- 0012-186X. ; 45:9, s. 1298-1306
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Aims/hypothesis. Autoantibodies against CD38 have been found in some patients with Type II (non-insulin-dependent) diabetes mellitus and have been shown to stimulate insulin secretion by cultured human islets. We tested whether this new form of autoimmunity, (i) overlaps with anti-GAD autoimmunity, (ii) identifies an insulin-deficient phenotype, (iii) is under the influence of genetic factors. Methods. We screened 496 adults by immuno-blot analysis in the Botnia Study (298 with Type II and 98 with Type I (insulin-dependent) diabetes mellitus, 100 non-diabetic control subjects). Results. CD38-autoantibodies were found in 8.4% of Type II diabetic patients (p<0.003 vs 0% of control subjects), particularly in anti-GAD positive (14% vs 6% of anti-GAD negative, p=0.0004). CD38ab were also found in 4% of Type I diabetic patients; in the whole study group, 59% of anti-CD38 positive had DQB1 *02 compared with 38% of anti-CD38 negative (p=0.04). On the OGTT, beta-cell function (as the ratio of insulin-to-glucose areas) was impaired (p=0.02) only in association with anti-GAD positivity (3.2 +/- 3.1 U/mol, mean +/- SD) but not in anti-CD38 positive patients (5.6 +/- 2.9) as compared with patients free of autoimmunity (4.5 +/- 4.6, p=NS). In 44 Type II diabetic patients (22 negative and 22 positive for anti-CD38), no mutations were detected in any of the 8 exons, 5' end of intron 1 or the 5' and 3' untranslated regions of the CD38 gene. The previously described missense mutation (Arg140Trp) in exon 3 was not found in this cohort. There was no association between the PvUII polymorphism and clinical phenotype. Conclusion. Anti-CD38 autoimmunity identifies a clinical phenotype similar to non-autoimmune Type II diabetes, with relative preserved beta-cell function and weak genetic influence.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
Nyckelord
- insulin secretion
- CD38 polymorphisms
- missense mutation
- Type I diabetes mellitus
- Type II diabetes mellitus
- GAD antibodies
- CD38 antibodies
- CD38 gene
- LADA
- HLA
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