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The INSIG2 rs7566605 genetic variant does not play a major role in obesity in a sample of 24,722 individuals from four cohorts.
BMC Med Genet. 2009 Jun 12; 10:56.BM

Abstract

BACKGROUND

In a genome-wide association study performed in the Framingham Offspring Cohort, individuals homozygous for the rs7566605 C allele located upstream of insulin-induced gene 2 (INSIG2) were reported to incur an increased risk of obesity. This finding was later replicated in four out of five populations examined. The goal of the study reported here was to assess the role of the INSIG2 single nucleotide polymorphism (SNP) in susceptibility to obesity in the prospective longitudinal Atherosclerosis Risk in Communities (ARIC) study (n = 14,566) and in three other cohorts: the Coronary Artery Risk Development in Young Adults (CARDIA) study (n = 3,888), the Genetic Epidemiology Network of Arteriopathy (GENOA) study (n = 4,766), and extremely obese and lean individuals ascertained at the University of Ottawa (n = 1,502). The combined study sample is comprised of 24,722 white, African-American, and Mexican-American participants.

METHODS

Differences in mean body mass index (BMI) and other anthropometric measures including weight, waist circumference, and waist-to-hip ratio were assessed by a general linear model in individuals categorized by INSIG2 rs7566605 genotype. Multivariable logistic regression was used to predict the risk of obesity (BMI >or= 30 kg/m2).

RESULTS

There was no discernable variation in the frequencies of the three INSIG2 SNP genotypes observed between white, Hispanic, and African-American obese individuals and non-obese study subjects. When the relationship between rs7566605 and BMI considered either as a categorical variable or a continuous variable was examined, no significant association with obesity was found for participants in any of the four study populations or in a combined analysis (p = 0.38) under a recessive genetic model. There was also no association between the INSIG2 polymorphism and the obesity-related quantitative traits except for a reduced waist-to-hip ratio in white ARIC study participants homozygous for the C allele, and an increased waist-to-hip ratio in African-Americans in the ARIC cohort with the same genotype (p = 0.04 and p = 0.01, respectively). An association with waist-to-hip ratio was not seen when the combined study sample was analyzed (p = 0.74).

CONCLUSION

These results suggest that the INSIG2 rs7566605 variant does not play a major role in determining obesity risk in a racially and ethnically diverse sample of 24,722 individuals from four cohorts.

Authors+Show Affiliations

Human Genetics Center, University of Texas Health Science Center at Houston, Houston, TX 77030, USA. Jan.Bressler@uth.tmc.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

19523229

Citation

Bressler, Jan, et al. "The INSIG2 Rs7566605 Genetic Variant Does Not Play a Major Role in Obesity in a Sample of 24,722 Individuals From Four Cohorts." BMC Medical Genetics, vol. 10, 2009, p. 56.
Bressler J, Fornage M, Hanis CL, et al. The INSIG2 rs7566605 genetic variant does not play a major role in obesity in a sample of 24,722 individuals from four cohorts. BMC Med Genet. 2009;10:56.
Bressler, J., Fornage, M., Hanis, C. L., Kao, W. H., Lewis, C. E., McPherson, R., Dent, R., Mosley, T. H., Pennacchio, L. A., & Boerwinkle, E. (2009). The INSIG2 rs7566605 genetic variant does not play a major role in obesity in a sample of 24,722 individuals from four cohorts. BMC Medical Genetics, 10, 56. https://doi.org/10.1186/1471-2350-10-56
Bressler J, et al. The INSIG2 Rs7566605 Genetic Variant Does Not Play a Major Role in Obesity in a Sample of 24,722 Individuals From Four Cohorts. BMC Med Genet. 2009 Jun 12;10:56. PubMed PMID: 19523229.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The INSIG2 rs7566605 genetic variant does not play a major role in obesity in a sample of 24,722 individuals from four cohorts. AU - Bressler,Jan, AU - Fornage,Myriam, AU - Hanis,Craig L, AU - Kao,Wen Hong Linda, AU - Lewis,Cora E, AU - McPherson,Ruth, AU - Dent,Robert, AU - Mosley,Thomas H, AU - Pennacchio,Len A, AU - Boerwinkle,Eric, Y1 - 2009/06/12/ PY - 2008/11/25/received PY - 2009/06/12/accepted PY - 2009/6/16/entrez PY - 2009/6/16/pubmed PY - 2009/7/10/medline SP - 56 EP - 56 JF - BMC medical genetics JO - BMC Med. Genet. VL - 10 N2 - BACKGROUND: In a genome-wide association study performed in the Framingham Offspring Cohort, individuals homozygous for the rs7566605 C allele located upstream of insulin-induced gene 2 (INSIG2) were reported to incur an increased risk of obesity. This finding was later replicated in four out of five populations examined. The goal of the study reported here was to assess the role of the INSIG2 single nucleotide polymorphism (SNP) in susceptibility to obesity in the prospective longitudinal Atherosclerosis Risk in Communities (ARIC) study (n = 14,566) and in three other cohorts: the Coronary Artery Risk Development in Young Adults (CARDIA) study (n = 3,888), the Genetic Epidemiology Network of Arteriopathy (GENOA) study (n = 4,766), and extremely obese and lean individuals ascertained at the University of Ottawa (n = 1,502). The combined study sample is comprised of 24,722 white, African-American, and Mexican-American participants. METHODS: Differences in mean body mass index (BMI) and other anthropometric measures including weight, waist circumference, and waist-to-hip ratio were assessed by a general linear model in individuals categorized by INSIG2 rs7566605 genotype. Multivariable logistic regression was used to predict the risk of obesity (BMI >or= 30 kg/m2). RESULTS: There was no discernable variation in the frequencies of the three INSIG2 SNP genotypes observed between white, Hispanic, and African-American obese individuals and non-obese study subjects. When the relationship between rs7566605 and BMI considered either as a categorical variable or a continuous variable was examined, no significant association with obesity was found for participants in any of the four study populations or in a combined analysis (p = 0.38) under a recessive genetic model. There was also no association between the INSIG2 polymorphism and the obesity-related quantitative traits except for a reduced waist-to-hip ratio in white ARIC study participants homozygous for the C allele, and an increased waist-to-hip ratio in African-Americans in the ARIC cohort with the same genotype (p = 0.04 and p = 0.01, respectively). An association with waist-to-hip ratio was not seen when the combined study sample was analyzed (p = 0.74). CONCLUSION: These results suggest that the INSIG2 rs7566605 variant does not play a major role in determining obesity risk in a racially and ethnically diverse sample of 24,722 individuals from four cohorts. SN - 1471-2350 UR - https://www.unboundmedicine.com/medline/citation/19523229/The_INSIG2_rs7566605_genetic_variant_does_not_play_a_major_role_in_obesity_in_a_sample_of_24722_individuals_from_four_cohorts_ L2 - https://bmcmedgenet.biomedcentral.com/articles/10.1186/1471-2350-10-56 DB - PRIME DP - Unbound Medicine ER -