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No association of PTGDR -441C/T polymorphism with asthma in a North Indian population
Niti Birbian1, Jagtar Singh, Surinder Kumar Jindal
1Department of Biotechnology, Panjab University, Chandigarh, India.
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 the PTGDR gene have been suggested to be involved in the mechanism of asthma.
Objective:
This is the first study conducted in India, investigating the role of PTGDR -441C/T} promoter 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. The PTGDR -441C/T polymorphism 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 the PTGDR −441C/T polymorphism showed Chi² (χ²) = 0.29, OR = 0.95, 95% CI (0.70-1.15) and p = 0.599. Neither the genotypic nor the allelic frequencies observed for the PTGDR −441C/T polymorphism, were significantly associated with asthma or asthma phenotypes.
Conclusions:
The PTGDR -441C/T polymorphism is not associated with asthma or its phenotypes in the studied North Indian population.
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