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Association of GSTP1 and P16 promoter methylation with the risk of HBV-related hepatocellular carcinoma: a meta-analysis

Authors Li Q, Deng CL, Zhang T, Li X

Received 16 March 2018

Accepted for publication 6 July 2018

Published 12 September 2018 Volume 2018:11 Pages 5789—5796


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Samir Farghaly

Qin Li,1 Cunliang Deng,1 Ting Zhang,1 Xiang Li2

1Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, People’s Republic of China; 2School of Pharmacy, The Southwest Medical University, Luzhou, Sichuan Province, People’s Republic of China

Background: Study on the relationship between glutathione-S-transferase Pi 1 (GSTP1) and P16 promoter region methylation and the risk of hepatitis B virus-related hepatocellular carcinoma (HBV-related HCC) has produced inconsistent results.
Objectives: To assess the correlation between GSTP1 and P16 promoter methylation frequency and HBV-related HCC susceptibility.
Methods: All relevant studies were identified by searching PubMed, Embase, Web of Science, and China National Knowledge Infrastructure literature databases before December, 2017. The OR and the corresponding 95% CI were calculated to investigate the risk of GSTP1 and P16 promoter methylation rate and HBV-related HCC. Sensitivity analysis was performed and publication bias was estimated using the Begg’s and Egger’s test.
Results: Our meta-analysis identified the relationships of GSTP1 (six studies including 213 HBV-related HCC tumor tissues) and P16 (nine studies with 287 HBV-related HCC tumor tissue) promoter methylation with HCC risk. Compared with normal liver tissue and cirrhosis, the pooled ORs of GSTP1 promoter region methylation in HBV-related HCC cancer tissues were 6.05 (95% CI =1.20–30.52) and 5.21 (95% CI =2.19–12.41), respectively. Compared with paracancerous tissue, normal liver tissue, cirrhosis, and chronic hepatitis B as controls, the pooled ORs of P16 promoter region methylation in HBV-related HCC cancer tissues were 7.18 (95% CI =2.31–22.33), 24.89 (95% CI =3.38–183.03), 5.92 (95% CI =1.78–19.68), and 12.12 (95% CI =0.75–196.50).
Conclusion: In summary, our meta-analysis found strong associations between GSTP1 and P16 gene promoter methylation and an increased HBV-related HCC susceptibility. Moreover, GSTP1 and P16 methylation in promoter region could obviously increase the risk of HBV-related HCC in patients with cirrhosis, indicating that these would be promising biomarkers for early clinical diagnosis of HBV-related HCC.

hepatocellular carcinoma, Hepatitis B virus, GSTP1, P16, meta-analysis

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