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English Abstract
Journal Article
Research Support, Non-U.S. Gov't
[Dynamic expression of hepatitis B virus covalently closed circular DNA in 2.2.15 cell].
Chinese Journal of Experimental and Clinical Virology 2005 December
BACKGROUND: To determine the presence of covalently closed circular DNA (cccDNA), and to investigate the expression kinetics of HBV DNA, HBsAg and HBeAg in 2.2.15 cell.
METHODS: HBV cccDNA was assessed by polymerase chain reaction, HBV DNA was measured by Taqman quantitative PCR and HBsAg and HBeAg was measured by EIA.
RESULTS: HBV cccDNA was found in both intracellular and extracellular space. There was a good correlation between HBsAg, HBeAg and HBV DNA in the supernatant of 2.2.15 cell (r= 0.833, P < 0.05 and r= 0.939, P < 0.01 for HBsAg and HBeAg, respectively), whereas there was no significant correlation between intracellular HBV DNA levels and virus antigen levels (r= 0.024, P= 0.955 and r= 0.177; P= 0.625 for HBsAg and HBeAg, respectively).
CONCLUSION: HBV cccDNA was detectable in the culture medium and intracellularly in 2.2.15 cells, and these data provided an indication of HBV replication in 2.2.15 cell.
METHODS: HBV cccDNA was assessed by polymerase chain reaction, HBV DNA was measured by Taqman quantitative PCR and HBsAg and HBeAg was measured by EIA.
RESULTS: HBV cccDNA was found in both intracellular and extracellular space. There was a good correlation between HBsAg, HBeAg and HBV DNA in the supernatant of 2.2.15 cell (r= 0.833, P < 0.05 and r= 0.939, P < 0.01 for HBsAg and HBeAg, respectively), whereas there was no significant correlation between intracellular HBV DNA levels and virus antigen levels (r= 0.024, P= 0.955 and r= 0.177; P= 0.625 for HBsAg and HBeAg, respectively).
CONCLUSION: HBV cccDNA was detectable in the culture medium and intracellularly in 2.2.15 cells, and these data provided an indication of HBV replication in 2.2.15 cell.
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