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  • Author: Jian-Liang Lv x
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Open access

Qing He, Qi-yuan Tang, Xiao-hua Le, De-liang Lv, Xiang-mei Zhang, Fei-jian Ao, Yi-min Tang, Shan Huang, John Nunnari and Gui-lin Yang

Abstract

Objective The clinical significance of differential distribution of hepatitis B virus (HBV) nucleocapsid antigen in hepatocytes remains unknown. The goal of this study is to determine the relationship between distinct HBV core antigen distribution pattern and alanine transaminase (ALT), liver histological inflammatory activity grades, serum HBeAg status and HBV DNA level.

Methods Total of 958 cases with chronic hepatitis B were recruited into this study. Liver function tests, serum HBV DNA level, serological HBV markers and liver immunohistochemistry were examined according to the conventional instructions. Chi Square tests were performed to analyze the differences among these groups.

Results It was found that 552 (58%) cases were tested positive for HBV core antigen by immunohistochemical staining. Cytoplasmic hepatitis B core antigen (HBcAg) expression correlated with ALT level and serum HBV DNA and liver inflammatory activity scores, however, nuclear HBcAg expression in hepatocytes was associated with normal ALT level, lower liver inflammatory activity score and higher serum HBV DNA level and rate of HBeAg positivity. Both nuclear and cytoplasmic HBcAg expression in hepatocytes associated with a middle ALT level and liver inflammatory activity score, higher rate of serum detectable HBeAg and a higher HBV DNA level. However, undetectable core antigen was related to a lower ALT level and histological inflammatory activity grade, lower positive HBeAg rate and HBV DNA level.

Conclusions Undetectable liver HBcAg is associated with HBV clearance, ALT normalization and hepatitis B e antigen (HBeAg) seroconversion, and cytoplasmic HBcAg expression associated with higher hepatic inflammatory activity. However, nuclear HBcAg expression correlates with immune tolerance characterized with normal ALT and lower liver inflammatory activity, higher HBV replication level and higher rate of HBeAg positivity.

Open access

Ya-Li Liu, Yao-Zhong Ding, Jun-Fei Dai, Bing Ma, Ji-Jun He, Wei-Min Ma, Jian-Liang Lv, Xiao-Yuan Ma, Yun-Wen Ou, Jun Wang, Yong-Sheng Liu, Hui-Yun Chang, Yong-Lu Wang, Qiang Zhang, Xiang-Tao Liu, Yong-Guang Zhang and Jie Zhang

Abstract

Introduction

The extremely high genetic variation and the continuously emerging variants of foot-and-mouth disease virus (FMDV) of Southern African Territory (SAT) serotypes including SAT1, SAT2, and SAT3 make it necessary to develop a new RT-PCR for general use for monitoring viruses based on the updated genome information.

Material and Methods

A FMDV SAT-D8 one-step RT-PCR was established based on the 1D2A2B genes of the SAT serotype viruses with a multiplex primer set. FMDV A, O, C, and Asia 1 serotypes, other vesicular disease viruses, inactivated SAT viruses, and 125 bovine, ovine, caprine and porcine tissue samples collected from the Chinese mainland were included for evaluating the assay.

Results

The new RT-PCR was proven to be specific without cross-reactions with Eurasian FMDV, swine vesicular disease virus (SVDV), Seneca valley virus (SVV), or other common viral pathogens of cattle, sheep, goat, and pig. An around 257 bp-sized amplicon clearly appeared when the inactivated SAT viruses were detected. However, all 125 samples collected from FMDV-susceptible animals from the Chinese mainland which has not known SAT epidemics showed negative results.

Conclusions

A FMDV SAT-D8 one-step RT-PCR is a promising method for primary screening for FMDV SAT serotypes.