The effects of CH925, a novel immune modulator, on hepadna virus infection was evaluated. Day-old ducklings were inoculated intravenously with LJ-76 DHBV containing serum. Infected ducklings were then treated with the...The effects of CH925, a novel immune modulator, on hepadna virus infection was evaluated. Day-old ducklings were inoculated intravenously with LJ-76 DHBV containing serum. Infected ducklings were then treated with the CH925 and the mixture of IL-2 and IL-6 intravenously and the control ducklings received equivalent normal saline (NS). Blood and liver samples were taken and assayed for DHBV DNA and /or DHBsAg. At the completion of the experiment there was a inhibition of viremia with the CH925 and IL-2 + IL-6. Serum DHBV DNA was detected in 6 of 10 ducks in 100 000 unit/kg dosage group, 7 of 10 ducks in 50 000 unit/kg dosage group and 6 of 10 ducks in IL-2 + IL-6 dosage group, compared with 9 of 10 NS control, and it showed a similar result in circulating DHBsAg. When samples of liver DNA were processed for hybridization, a little difference in the DHBV DNA replication was noted between ducks receiving CH925, IL-2 + IL-6 or NS placebo. It is suggested that CH925 might be a potential remedy in HBV infection treatment.展开更多
HBV Pre S1 sequence is supposed to play an important role in the infection of HBV. Presence of Pre S1 /anti-Pre S1 in serum has valuble clinical imphations. In order to improve the study of Pre S1, Pre S1 sequence was...HBV Pre S1 sequence is supposed to play an important role in the infection of HBV. Presence of Pre S1 /anti-Pre S1 in serum has valuble clinical imphations. In order to improve the study of Pre S1, Pre S1 sequence was overexpressed in E. coli as a fusion protein with MBP (Maltose- binding Protein), and anti-Pre S1 antiserum was elicited in rabbits by Pre S1 MBP purified by affinity chromatography. The recombinant plasmid constructed from PMAL-cRI expressed the 106aa Pre S1 sequence at the C terminal of MBP by tac promoter. The resulting Protein is about 54kD in size. Western-blot analysis confirmed its reactivity with antiserum derived from synthetic Pre S1 peptide and serum from patients with acute hepatitis B (AHB). ELISA showed that Pre S1-MBP and Dane Particles purified from AHB patient’s serum reacted with antiserum against synthetic Pre S1 peptlde,and this reaction was specifically inhibited by synthetic Pre S1 peptide. ELISA also demonstrated that antiserum against Pre S1-MBP reacted with synthetic Pre S1 peptide, but not with synthetic HCV peptide or HEV peptide.展开更多
文摘The effects of CH925, a novel immune modulator, on hepadna virus infection was evaluated. Day-old ducklings were inoculated intravenously with LJ-76 DHBV containing serum. Infected ducklings were then treated with the CH925 and the mixture of IL-2 and IL-6 intravenously and the control ducklings received equivalent normal saline (NS). Blood and liver samples were taken and assayed for DHBV DNA and /or DHBsAg. At the completion of the experiment there was a inhibition of viremia with the CH925 and IL-2 + IL-6. Serum DHBV DNA was detected in 6 of 10 ducks in 100 000 unit/kg dosage group, 7 of 10 ducks in 50 000 unit/kg dosage group and 6 of 10 ducks in IL-2 + IL-6 dosage group, compared with 9 of 10 NS control, and it showed a similar result in circulating DHBsAg. When samples of liver DNA were processed for hybridization, a little difference in the DHBV DNA replication was noted between ducks receiving CH925, IL-2 + IL-6 or NS placebo. It is suggested that CH925 might be a potential remedy in HBV infection treatment.
文摘HBV Pre S1 sequence is supposed to play an important role in the infection of HBV. Presence of Pre S1 /anti-Pre S1 in serum has valuble clinical imphations. In order to improve the study of Pre S1, Pre S1 sequence was overexpressed in E. coli as a fusion protein with MBP (Maltose- binding Protein), and anti-Pre S1 antiserum was elicited in rabbits by Pre S1 MBP purified by affinity chromatography. The recombinant plasmid constructed from PMAL-cRI expressed the 106aa Pre S1 sequence at the C terminal of MBP by tac promoter. The resulting Protein is about 54kD in size. Western-blot analysis confirmed its reactivity with antiserum derived from synthetic Pre S1 peptide and serum from patients with acute hepatitis B (AHB). ELISA showed that Pre S1-MBP and Dane Particles purified from AHB patient’s serum reacted with antiserum against synthetic Pre S1 peptlde,and this reaction was specifically inhibited by synthetic Pre S1 peptide. ELISA also demonstrated that antiserum against Pre S1-MBP reacted with synthetic Pre S1 peptide, but not with synthetic HCV peptide or HEV peptide.