Harishankar M, Ravikrishnan H, Ravishankar A, Hanna LE, Swaminathan S, Selvaraj P, Bethunaickan R. IL-10 Promoter -592 Polymorphism may Influence Susceptibility to HIV Infection in South Indian Population.
Curr HIV Res 2019;
16:58-63. [PMID:
29468971 DOI:
10.2174/1570162x16666180219153752]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/02/2018] [Accepted: 02/12/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND
Genetic factors play an important role in the development of disease susceptibility or protection. Cytokine gene polymorphisms are reported to be associated with altered levels of cytokine production that can impact disease progression in HIV and TB.
OBJECTIVE
In this study, we studied IL-10 -592(C/A) and TGF-β -509 (C/T) promoter polymorphisms to understand their role in susceptibility or resistance to HIV and TB in a South Indian population.
METHOD
Genomic DNA was isolated from healthy controls, pulmonary tuberculosis patients (n=122) and HIV positive individuals (n=100) and used for genotyping by polymerase chain reaction followed by restriction fragment length polymorphism (PCR-RFLP) method.
RESULTS
Results revealed that under dominant model (CC vs CA+AA), IL-10 -592 'A' allele either 'CA' or 'AA' combinations significantly associated with susceptibility to HIV compared to healthy controls (OR: 1.88(1.05-3.35); p=0.030). However, we found no significant association with TB. TGF-β -509 polymorphism did not associate with either HIV or TB under overdominant model. Neither of the promoter polymorphisms associated with sex in either HIV or TB. However, a trend towards higher risk to HIV was found in females compared with males in IL-10 -592 'AA' genotype.
CONCLUSION
This study suggests the association of IL-10 -592 "AA" genotype with susceptibility to HIV under dominant model in the Southern Indian population. Future studies are needed with a larger sample size in order to confirm the observations made in this study.
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