Abstract：
:Genetic variations in chemokine genes influence the chemoattractive properties of T cells which may be associated with outcome of infections. In present study, we have investigated the regulatory role played by In1.1T/C (rs2280789) polymorphism of CCL5 and -135G/A (rs56061981) polymorphism of CXCL10 gene on intracellular CCL5 and CXCL10 expression in T cells. Whole blood cell cultures were stimulated with culture filtrate antigen (CFA) and infected with live M. tuberculosis were used for intracellular CCL5 and CXCL10 expression using flow cytometry. Genotyping was performed using polymerase chain reaction based restriction fragment length polymorphism (PCR-RFLP). Significantly higher expression of CCL5 expressing CD3+ and CD3+ CD8+ T cells were observed in HCs with In1.1TT genotype compared to C allele carrier (TT+TC) under unstimulated and CFA induced cultures (p<0.05). In -135G/A (rs56061981) polymorphism, PTB patients with GG genotype showed a significantly decreased expression of CD3+ CXCL10+ and CD3+ CD4+ CXCL10+ T cells compared to A allele carrier (GA+AA) under unstimulated, CFA induced and M. tuberculosis infected cultures (P<0.05). The present study suggest that TT genotype of CCL5 In1.1T/C (rs2280789) polymorphism play an important role to increased CCL5 expression in T cell which may enhanced Th1 immunity and help in protection against tuberculosis. The study also suggests GG genotype of CXCL10 -135G/A (rs56061981) polymorphism decreased CXCL10 expression in T cells which may have defective recruitment of mononuclear cells at the site of infection as well granuloma formation and in turn contribute to progression of TB.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Singh B,Anbalagan S,Selvaraj Pdoi
10.1016/j.humimm.2017.03.008subject
Has Abstractpub_date
2017-01-01 00:00:00pages
430-434issue
5-6eissn
0198-8859issn
1879-1166pii
S0198-8859(17)30048-4journal_volume
78pub_type
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