학술논문
Common polymorphic variation in the genetically diverse African insulin gene and its association with size at birth.
Document Type
Academic Journal
Author
Petry CJ; Department of Paediatrics, Box 116, Addenbrooke's Hospital, University of Cambridge, Hills Road, Cambridge, CB2 0QQ, UK. cjp1002@cam.ac.uk; Rayco-Solon P; Fulford AJ; Stead JD; Wingate DL; Ong KK; Sirugo G; Prentice AM; Dunger DB
Source
Publisher: Springer Verlag Country of Publication: Germany NLM ID: 7613873 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1432-1203 (Electronic) Linking ISSN: 03406717 NLM ISO Abbreviation: Hum Genet Subsets: MEDLINE
Subject
Language
English
Abstract
The insulin variable number of tandem repeats (INS VNTR) has been variably associated with size at birth in non-African populations. Small size at birth is a major determinant of neonatal mortality, so the INS VNTR may influence survival. We tested the hypothesis, therefore, that genetic variation around the INS VNTR in a rural Gambian population, who experience seasonal variation in nutrition and subsequently birth weight, may be associated with foetal and early growth. Six polymorphisms flanking the INS VNTR were genotyped in over 2,500 people. Significant associations were detected between the maternally inherited SNP 27 (rs689) allele and birth length [effect size 17.5 (5.2-29.8) mm; P = 0.004; n = 361]. Significant associations were also found between the maternally inherited African-specific SNP 28 (rs5506) allele and post-natal weight gain [effect size 0.19 (0.05-0.32) z score points/year; P = 0.005; n = 728). These results suggest that in the Gambian population studied there are associations between polymorphic variation in the genetically diverse INS gene and foetal and early growth characteristics, which contribute to overall polygenic associations with these traits.