Details

Autor(en) / Beteiligte

• LIJUN MA
• HANSON, Robert L
• QUE, Lorem N
• YAN GUO
• KOBES, Sayuko
• BOGARDUS, Clifton
• BAIER, Leslie J

Titel

PCLO Variants Are Nominally Associated With Early-Onset Type 2 Diabetes and Insulin Resistance in Pima Indians

Ist Teil von

• Diabetes (New York, N.Y.), 2008-11, Vol.57 (11), p.3156-3160

Ort / Verlag

Alexandria, VA: American Diabetes Association

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• PCLO Variants Are Nominally Associated With Early-Onset Type 2 Diabetes and Insulin Resistance in Pima Indians Lijun Ma , Robert L. Hanson , Lorem N. Que , Yan Guo , Sayuko Kobes , Clifton Bogardus and Leslie J. Baier From the Diabetes Molecular Genetics Section, Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Phoenix, Arizona Corresponding author: Leslie J. Baier, lbaier{at}phx.niddk.nih.gov Abstract OBJECTIVE— A prior genome-wide association (GWA) study in Pima Indians identified variants within PCLO that were associated with early-onset type 2 diabetes. PCLO encodes a presynaptic cytomatrix protein that functions as a Ca 2+ sensor that may be involved in insulin secretion and/or insulin action. Therefore, PCLO was analyzed as a candidate gene for type 2 diabetes. RESEARCH DESIGN AND METHODS— Sequencing of PCLO identified four nonsynonymous variants and a 10–amino acid insertion. These variants, together with 100 additional variants identified by sequencing or chosen from databases, were genotyped for association analysis in the same 895 subjects analyzed in the prior GWA study (300 case subjects with diabetes onset at aged <25 years, 334 nondiabetic control subjects aged >45 years, and 261 discordant siblings of the case or control subjects for within-family analyses), as well as 415 nondiabetic Pima Indians who had been metabolically phenotyped for predictors of diabetes. Selected variants were further genotyped in a population-based sample of 3,501 Pima Indians. RESULTS— Four variants were modestly associated with early-onset type 2 diabetes in both general and within-family analyses ( P = 0.004–0.04, recessive model), where the diabetes risk allele was also nominally associated with a lower insulin-mediated glucose disposal rate ( P = 0.009–0.14, recessive model) in nondiabetic Pima Indians. However, their association with diabetes in the population-based sample was weaker ( P = 0.02–0.20, recessive model). CONCLUSIONS— Variation within PCLO may have a modest effect on early-onset type 2 diabetes, possibly as a result of reduced insulin action, but has minimal, if any, impact on population-based risk for type 2 diabetes. Footnotes Published ahead of print at http://diabetes.diabetesjournals.org on 22 July 2008. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. See http://creativecommons.org/licenses/by-nc-nd/3.0/ for details. The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked “advertisement” in accordance with 18 U.S.C. Section 1734 solely to indicate this fact. Accepted July 15, 2008. Received December 20, 2007. DIABETES