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Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study

OBJECTIVE: This study evaluated the influence of somatostatin receptor type 2 (SSTR2) polymorphisms on measures of glucose homeostasis in the Insulin Resistance Atherosclerosis Family Study (IRASFS). SSTR2 is a G-protein–coupled receptor that, in response to somatostatin, mediates inhibition of insu...

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Autores principales: Sutton, Beth S., Palmer, Nicholette D., Langefeld, Carl D., Xue, Bingzhong, Proctor, Alexandria, Ziegler, Julie T., Haffner, Steven M., Norris, Jill M., Bowden, Donald W.
Formato: Texto
Lenguaje:English
Publicado: American Diabetes Association 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2682669/
https://www.ncbi.nlm.nih.gov/pubmed/19324939
http://dx.doi.org/10.2337/db08-0189
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author Sutton, Beth S.
Palmer, Nicholette D.
Langefeld, Carl D.
Xue, Bingzhong
Proctor, Alexandria
Ziegler, Julie T.
Haffner, Steven M.
Norris, Jill M.
Bowden, Donald W.
author_facet Sutton, Beth S.
Palmer, Nicholette D.
Langefeld, Carl D.
Xue, Bingzhong
Proctor, Alexandria
Ziegler, Julie T.
Haffner, Steven M.
Norris, Jill M.
Bowden, Donald W.
author_sort Sutton, Beth S.
collection PubMed
description OBJECTIVE: This study evaluated the influence of somatostatin receptor type 2 (SSTR2) polymorphisms on measures of glucose homeostasis in the Insulin Resistance Atherosclerosis Family Study (IRASFS). SSTR2 is a G-protein–coupled receptor that, in response to somatostatin, mediates inhibition of insulin, glucagon, and growth hormone release and thus may affect glucose homeostasis. RESEARCH DESIGN AND METHODS: Ten single nucleotide polymorphisms (SNPs) spanning the gene were chosen using a SNP density selection algorithm and genotyped on 1,425 Hispanic-American individuals from 90 families in the IRASFS. These families comprised two samples (set 1 and set 2), which were analyzed individually and as a combined set. Single SNP tests of association were performed for four glucose homeostasis measures—insulin sensitivity (S(I)), acute insulin response (AIR), disposition index (DI), and fasting blood glucose (FBG)—using generalized estimating equations. RESULTS: The SSTR2 locus was encompassed by a single linkage disequilibrium (LD) block (D′ = 0.91–1.00; r(2) = 0.09–0.97) that contained four of the ten SNPs evaluated. Within the SSTR2-containing LD block, evidence of association was observed in each of the two sets and in a combined analysis with decreased S(I)(β(homozygous) = −0.16; P(meta-analysis) = 0.0024–0.0030), decreased DI (β(homozygous) = −0.35 to −5.16; P(meta-analysis) = 0.0075–0.027), and increased FBG (β(homozygous) = 2.30; P(meta-analysis) = 0.045). SNPs outside the SSTR2-containing LD block were not associated with measures of glucose homeostasis. CONCLUSIONS: We observed evidence for association of SSTR2 polymorphisms with measures of glucose homeostasis. Thus, variants in SSTR2 may influence pathways of S(I)to modulate glucose homeostasis.
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spelling pubmed-26826692010-06-01 Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study Sutton, Beth S. Palmer, Nicholette D. Langefeld, Carl D. Xue, Bingzhong Proctor, Alexandria Ziegler, Julie T. Haffner, Steven M. Norris, Jill M. Bowden, Donald W. Diabetes Genetics OBJECTIVE: This study evaluated the influence of somatostatin receptor type 2 (SSTR2) polymorphisms on measures of glucose homeostasis in the Insulin Resistance Atherosclerosis Family Study (IRASFS). SSTR2 is a G-protein–coupled receptor that, in response to somatostatin, mediates inhibition of insulin, glucagon, and growth hormone release and thus may affect glucose homeostasis. RESEARCH DESIGN AND METHODS: Ten single nucleotide polymorphisms (SNPs) spanning the gene were chosen using a SNP density selection algorithm and genotyped on 1,425 Hispanic-American individuals from 90 families in the IRASFS. These families comprised two samples (set 1 and set 2), which were analyzed individually and as a combined set. Single SNP tests of association were performed for four glucose homeostasis measures—insulin sensitivity (S(I)), acute insulin response (AIR), disposition index (DI), and fasting blood glucose (FBG)—using generalized estimating equations. RESULTS: The SSTR2 locus was encompassed by a single linkage disequilibrium (LD) block (D′ = 0.91–1.00; r(2) = 0.09–0.97) that contained four of the ten SNPs evaluated. Within the SSTR2-containing LD block, evidence of association was observed in each of the two sets and in a combined analysis with decreased S(I)(β(homozygous) = −0.16; P(meta-analysis) = 0.0024–0.0030), decreased DI (β(homozygous) = −0.35 to −5.16; P(meta-analysis) = 0.0075–0.027), and increased FBG (β(homozygous) = 2.30; P(meta-analysis) = 0.045). SNPs outside the SSTR2-containing LD block were not associated with measures of glucose homeostasis. CONCLUSIONS: We observed evidence for association of SSTR2 polymorphisms with measures of glucose homeostasis. Thus, variants in SSTR2 may influence pathways of S(I)to modulate glucose homeostasis. American Diabetes Association 2009-06 2009-03-26 /pmc/articles/PMC2682669/ /pubmed/19324939 http://dx.doi.org/10.2337/db08-0189 Text en © 2009 by the American Diabetes Association.
spellingShingle Genetics
Sutton, Beth S.
Palmer, Nicholette D.
Langefeld, Carl D.
Xue, Bingzhong
Proctor, Alexandria
Ziegler, Julie T.
Haffner, Steven M.
Norris, Jill M.
Bowden, Donald W.
Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title_full Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title_fullStr Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title_full_unstemmed Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title_short Association of SSTR2 Polymorphisms and Glucose Homeostasis Phenotypes: The Insulin Resistance Atherosclerosis Family Study
title_sort association of sstr2 polymorphisms and glucose homeostasis phenotypes: the insulin resistance atherosclerosis family study
topic Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2682669/
https://www.ncbi.nlm.nih.gov/pubmed/19324939
http://dx.doi.org/10.2337/db08-0189
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