This study was aimed to investigate the association of polymorphisms in tumor necrosis factor-alpha (TNF-α) 308 G>A and TNF-β +252 A>G genes with primary ITP in Indian patients.
To examine the role of genetic factors in development of immune thrombocytopenic purpura (ITP) in association with Helicobacter pylori infection, gene polymorphisms within the loci for human leukocyte antigen class II, interleukin (IL)-1beta (-511), tumor necrosis factor-beta (+252), immunoglobulin (Ig)G1 heavy chain (+643), and Igkappa light chain (+573) were determined in 164 adults with ITP and 75 healthy controls.
These findings suggest that the SNP located at TNF-beta (+252) contributes to susceptibility to chronic ITP by controlling the autoreactive B-cell responses to platelet membrane glycoproteins.