No Association ofPTGDR−441C/TPolymorphism with Asthma in a North Indian Population

摘要

Background:Asthma is the most prevalent disease in India according to the national survey conducted by NFHS 2 in 1998–399. Prostaglandin D2 (PGD2) is a bronchoconstriction inducing metabolite of arachidonic acid in the mast cells, which is produced on exposure to allergens and acts as a ligand for the Prostaglandin D2 Receptor (PTGDR). Polymorphisms in thePTGDRgene have been suggested to be involved in the mechanism of asthma.Objective:This is the first study conducted in India, investigating the role ofPTGDR−441C/Tpromoter polymorphism in asthma pathogenesis.Methods:A case-control study was performed with a total of 992 subjects, including 410 adult asthmatics and 582 healthy controls from regions of North India. ThePTGDR−441C/Tpolymorphism was genotyped by Tetra-Primer Amplification Refractory Mutation System Polymerase Chain Reaction (Tetra-Primer ARMS PCR).Results:Statistical analysis of the results between asthma cases and controls for thePTGDR−441C/Tpolymorphism showed Chi2(χ2) = 0.29, OR = 0.95, 95% CI (0.70–1.15) andp= 0.599. Neither the genotypic nor the allelic frequencies observed for thePTGDR−441C/Tpolymorphism, were significantly associated with asthma or asthma phenotypes.Conclusions:ThePTGDR−441C/Tpolymorphism is not associated with asthma or its phenotypes in the studied North Indian population.