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A Study on Genetic Test of Lactase Persistence in Relation to Milk Consumption in Regional Groups of India.
MedLine Citation:
PMID:  23030683     Owner:  NLM     Status:  Publisher    
Background: Lactase nonpersistence (LNP) is characterized by the decrease in lactase expression in the small intestine. Studies have shown that -13910 C>T and -22018 G>A single-nucleotide polymorphisms (SNPs) located upstream of the lactase gene are associated with an LNP/lactase persistence (LP) trait. Objective: The current study evaluated the LP allelic frequency in 227 healthy Indian subjects consisting of North Indians, Maharashtrians, Gujaratis, Parsis, and South Indians, and for the first time assessed its relation with milk consumption pattern in Indian subjects. Methods: The two SNPs were genotyped using the polymerase chain reaction and restriction fragment length polymorphism methods. The milk consumption pattern for the studied subjects was noted by questionnaire. Results: The two SNPs were present in a strong linkage disequilibrium. LP prevalence varied in these Indian regional groups. The LP frequency was highest for North Indians and lowest for Parsis (p=0.03 CC vs. CT+TT, p=0.008 GG vs. GA+AA). South Indians had a lower LP frequency compared to North Indians (p=0.07 for each SNP). The milk consumption pattern varied in these Indian subgroups, with the Gujaratis exhibiting the highest milk intake and Parsis the lowest (p=0.04). Conclusion: Our study indicates that the milk intake in Indians might be influenced by their dietary habits in addition to their ancestral history. An overall correlation, however, between milk consumption and LP genotypes was not observed.
Shruti V Baadkar; Manjari S Mukherjee; Smita S Lele
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-3
Journal Detail:
Title:  Genetic testing and molecular biomarkers     Volume:  -     ISSN:  1945-0257     ISO Abbreviation:  Genet Test Mol Biomarkers     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101494210     Medline TA:  Genet Test Mol Biomarkers     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1 Food Engineering and Technology Department, Institute of Chemical Technology , Mumbai, India .
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