PT - JOURNAL ARTICLE AU - Mahesh Padukudru Anand AU - Sangeetha Visweshwaraiah AU - Ramachandra Nallur AU - Jayaraj Biligere AU - Chaya Sindaghatta AU - Amrutha Holla TI - Association between genetic polymorphisms of <em>ADAM33</em> with asthma and its phenotypes AID - 10.1183/13993003.congress-2015.PA1230 DP - 2015 Sep 01 TA - European Respiratory Journal PG - PA1230 VI - 46 IP - suppl 59 4099 - http://erj.ersjournals.com/content/46/suppl_59/PA1230.short 4100 - http://erj.ersjournals.com/content/46/suppl_59/PA1230.full SO - Eur Respir J2015 Sep 01; 46 AB - Background: ADAM33 is one of the positionally cloned asthma associated genes, which has been identified as susceptibility gene for asthma in different populations.Aims and Objectives: To study ADAM33 polymorphisms and understand their role in asthma phenotypes, asthma severity and response to treatment after 2 months of ICS and LABA in south Indian population.Methods: A total of 989 individuals including 503 asthma cases and 486 normal controls were genotyped for 6 ADAM33 SNPs using MassARRAY technique with a MALDI-TOF MS analyzer. SNPs of ADAM33 were correlated with various phenotypes of asthma. Haplotype analysis using Haploview software V.4.0 was done to assess the association between haplotype of ADAM33 SNPs and asthma.Results: There was no association of any ADAM 33 SNP with asthma. There was no association with either atopic or non-atopic asthma. On subgroup analysis, rs2853209 an association with TT genotype and minor T allele was observed with moderate asthma (P&lt;0.01). A significant association between SNP rs2787094 and degree of reversibility in FEV1 and FVC after 2 months of ICS and LABAs was observed (p-0.0001). Two markers (rs2853209 and rs3918396) T/G haplotype analysis showed association with asthma (p-0.0345).Conclusion: We observed association of rs2853209 with moderate asthma and rs2787094 with FEV1 and FVC reversibility after treatment and two marker haplotype associations with asthma in south Indian population. Further in-vitro functional studies are required to confirm the associations.