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[Meta-analysis on association between interleukin-6-174C/G and -634C/G polymorphisms and pneumoconiosis
Yanxing Hao1, Jiangping Li1, Xinchen Shi1
1Public Health and Management of Ningxia Medical University, Yinchuan 750004, China.
Objective:
To explore the association between the interleukin-6-174 C/G and-634 C/G polymorphisms and pneumoconiosis susceptibility.
Methods:
Taking pneumoconiosis, interleukin-6, and polymorphism as keywords, Chinese literatures were retrieved among the Sinomed, Wanfang Medicine, CNKI and VIP databases, and foreign language literatures were retrieved among the Pubmed, Embase, Cochrane Library and Web of Science databases. Taking pneumoconiosis, susceptibility, and interleukin-6 as keywords, Revman 5. 2 software was employed to combine the genetic effects and evaluate the quality of the included literatures.
Results:
A total of seven literatures(containing nine case-control studies) were included, including 660 cases and 848 controls with IL-6-174 C/G polymorphism, and 344 cases and 362 controls with IL-6-634 C/G polymorphism. Meta-analysis shows that IL-6-174 C/G polymorphism is not associated with pneumoconiosis susceptibility(CC νs. CG+GG, OR=1. 05(95%CI 0. 76-1. 45), CG νs. GG+CC, OR=0. 79(95%CI 0. 40-1. 55), C νs. G, OR=0. 95(95% CI 0. 80-1. 14)), while IL-6-634 C/G polymorphism is associated with pneumoconiosis susceptibility(CC νs. CG+GG, OR=2. 12(95%CI 1. 56-2. 88), CG νs. GG+CC, OR=0. 40(95%CI 0. 27-0. 58), C νs. G, OR=1. 67(95%CI 1. 33-2. 11)).
Conclusion:
There exists an association between the IL-6-634 C/G polymorphism and pneumoconiosis susceptibility, while there isn't an association between the IL-6-174 C/G polymorphism and the susceptibility of pneumoconiosis. IL-6-634 C/C genotype is pneumoconiosis-susceptible genotype.

