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Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition) ›› 2023, Vol. 17 ›› Issue (05): 324-332. doi: 10.3877/cma.j.issn.1674-1358.2023.05.006

• Research Article • Previous Articles     Next Articles

Effect of drug-resistant mutations in reverse transcriptase region of hepatitis B virus on the level of serum hepatitis B surface antigen

Xiaoman Zhang, Xiaoqiu Ma, Zhengju Xu, Chunyu Zhang, Caiting He()   

  1. Infectious Diseases Department, the 910th Joint Logistic Support Unit of the People’s Liberation Army of China, Quanzhou 362000, China
    Department of Health Medicine, the 910th Joint Logistic Support Unit of the People’s Liberation Army of China, Quanzhou 362000, China
  • Received:2023-02-03 Online:2023-10-15 Published:2023-12-19
  • Contact: Caiting He

Abstract:

Objective

To investigate the effect of drug-resistant mutations in the reverse transcriptase region (RT) of hepatitis B virus (HBV) on serum hepatitis B surface antigen (HBsAg) level.

Methods

HBV DNA RT region was sequenced from 402 patients with chronic hepatitis B (CHB) who received nucleos(t)ide analogues drug treatment in Infectious Diseases Department of the 910th Joint Logistic Support Unit of the People’s Liberation Army of China from January 2016 to December 2021 by direct sequencing. According to the resistance mutation in RT region, the patients were divided into HBV RT wild group (181 cases) and HBV RT resistant mutation group (221 cases, including 33 cases with A181 mutation, 15 cases with V191 mutation, 82 cases with L180 + M204V mutation and 91 cases with M204I mutation). The influence factors of serum HBsAg level and the impact of HBV RT region resistance mutations on serum HBsAg level were analyzed by non parametric rank sum test (Mann Whitney U). The correlation between serum HBsAg level and HBV DNA in HBV RT resistant mutation group was explored by Spearman correlation analysis.

Results

The levels of serum HBsAg, ALT, AST and HBV genotype B infected patients in HBV RT wild group were significantly higher than those in HBV RT resistant mutation group (Z = -3.426, P = 0.001; Z =-2.347, P = 0.019; Z =-2.532, P = 0.011; Z =-10.387, P = 0.001). Among patients with HBV RT resistant mutation, serum HBsAg level in A181 mutation group, V191 mutation group, L180 + M204V mutation group, and M204I mutation group were significantly lower than those in HBV RT wild group (Z = 2.475, P = 0.013; Z = 2.148, P = 0.032; Z = 2.115, P = 0.034; Z = 2.449, P = 0.014). There was no significant difference in HBV DNA level among the mutation groups (all P > 0.05). Serum HBsAg level were significantly positively correlated with HBV DNA load in A181 mutation group, L180M + M204V mutation group and M204I mutation group (r = 0.486, P = 0.004; r = 0.578, P < 0.001; r = 0.369, P < 0.001).

Conclusion

HBV RT region drug resistance mutation in site of A181, V191, L180 and M204V had negative effect on serum HBsAg level of patients with CHB.

Key words: Hepatitis B virus, Reverse transcriptase region, Drug resistance mutation, Hepatitis B surface antigen, Hepatitis B virus deoxyribonucleic acid

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