Meex SJR, van Greevenbroek MMJ, Ayoubi TA, Vlietinck R, van Vliet-Ostaptchouk JV, Hofker MH, Vermeulen VMMJ, Schalkwijk CG, Feskens EJM, Boer JMA, Stehouwer CDA, van der Kallen CJH, de Bruin TWA. Activating transcription factor 6 polymorphisms and haplotypes are associated with impaired glucose homeostasis and type 2 diabetes in Dutch Caucasians.
J Clin Endocrinol Metab 2007;
92:2720-5. [PMID:
17440018 DOI:
10.1210/jc.2006-2280]
[Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT
Activating transcription factor 6 (ATF6) is critical for initiation and full activation of the unfolded protein response. An association between genetic variation in ATF6 and type 2 diabetes (DM2) was recently reported in Pima Indians.
OBJECTIVES
To investigate the broader significance of this association for DM2, replication studies in distinct ethic populations are required. We investigated ATF6 for its association with DM2 in Dutch Caucasians.
DESIGN/SETTING
A genetic association study was conducted at an academic research laboratory.
STUDY PARTICIPANTS
Two independent Dutch cohorts were studied. Cohort 1 (n = 154) was used to evaluate genetic variation in the ATF6 gene in relation to glucose homeostasis in the general population. Cohort 2 (n = 798) consisted of patients with DM2, impaired glucose tolerance, impaired fasting glucose, and normoglycemic control subjects, and was used to investigate ATF6 polymorphisms for their contribution to disturbed glucose homeostasis and DM2.
MAIN OUTCOME MEASURES
There were 16 tag single nucleotide polymorphisms genotyped in all subjects of both cohorts. Those single nucleotide polymorphisms included three nonsynonymous coding variants and captured all common allelic variation of ATF6.
RESULTS
Our data show that common ATF6 variants are associated with elevated glucose levels in the general population (cohort 1, P = 0.005-0.05). Furthermore, the majority of these variants, and haplotypes thereof, were significantly associated with impaired fasting glucose, impaired glucose tolerance, and DM2 (cohort 2, P = 0.006-0.05). Associated variants differ from those identified in Pima Indians.
CONCLUSIONS
Our results strengthen the evidence that one or more variants in ATF6 are associated with disturbed glucose homeostasis and DM2.
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