Journal of Microbes and Infection,June 2007,Vol 2,No. 2. (HBsAg)2 , (PCR) 1762/ 1764
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1 Journal of Microbes and Infection,June 2007,Vol 2,No. 2 2 S (HBsAg)2 ( YIC) S 5 30g 60g YIC ( HBV) DNA > 2 log10 e (HBeAg), 6 DNA, 1 YIC 1, (PCR) (0 ) (44 ) HBV DNA S 2, S a 2,YIC 3 HBV 1762/ 1764, 2 5 S ; ; 2 Studies on hepatitis B virus S gene mutation in chronic hepatitis B patients treated with HBsAg2HBIG immunogenic complex therapeutic vaccine MA Zhang2mei, TIAN Xiao2chen, LI Xiao2xiao, XU Dao2zhen, GUO Li2min, ZHAO Kai, WEN Yu2mei ( Keylaboratory of Medical Molecular Virology, Shanghai Medical College Fudan University, Shanghai ) Abstract Objective To study whether HBsAg2HBIG immunogenic complex therapeutic vaccine ( YIC) could induce S gene immune escape mutants1methods Five chronic hepatitis B patients who had been treated with 6 injections of either 30 or 60 micrograms of YIC were recruited for this study1 These patients were those who responded to YIC treatment, shown as a drop in serum HBV DNA virus load > 2 log 10, with serum HBeAg converted to negative at 24 weeks1 However, their virus load rebound at the end of 24 weeks follow2up1 As controls, one was a patient who did not respond to YIC treatment and remained serum HBV DNA positive at similar level during and after treatment, while the other one was a patient immunized with the alum placebo1 Serum samples before treatment and 6 months after termination of treatment were collected, and DNA extracted1 PCR was used to amplify HBV S gene, the precore/ core gene and the core promoter regions followed by sequencing1results In all 7 patients treated with YIC or alum no S gene mutation was found in theadeterminant, nor was precore stop codon mutation detected1 However, three patients had mutations in the 1762/ 1764 core2promoter region, other two patients had mutations in the core promoter region other than the 1762/ 1764 double mutation1conclusion The rebound of HBV replication in five YIC2treated patients was not due to the emergence of HBV S immune2escape mutants1 Key words Therapeutic vaccine ; Viral mutation ; Hepatitis B virus surface antigen2antibodies 315 ( HBsAg) HBsAg2 ( YIC) [124,50 %, ] 2002 (HBV),,, YIC HBV, HBV (2HBs) IFN2 22 ( IL2,, 2) [5 ] A 36, 60 g YIC 6,5/ 10, ( IFN) YIC HBV DNA > 2 log 10,, HBeAg 2HBe, IFN 2 HBsAg 1/ 3,IFN [6 ] B, 30 g 60g YIC YIC :11, ;21 ;31 :,E2mail edu. cn S,6 YIC 1 (0 ) (44 )
2 Journal of Microbes and Infection,June 2007,Vol 2,No HBV DNA S 2 (pre2c) C PCR ) 0 44 S YIC HBV DNA HBeAg 2 YIC B HBe 6 YIC 2 60g YIC ( # 52 # 92),4 30g YIC, YIC B, ( # 102 # 180 # 213 # 241) 1 ( # 150) g 60g YIC, g g YIC, 6 24 HBV DNA > 2 log 10 HBeAg, HBV DNA HBeAg 2HBe HBV DNA, 1 HBV DNA # 92 YIC # 52 1 # 102 # 180 # 213 # 241 YIC (0 ) 1 (44 ) 21 (1) DNA : 100 l 300 l TES ( 10mmol/ L, 2. YIC S a 015mmol/ L ph 810,015 %PCR 7 (0 ),200g/ ml K),65 3 (44 ) HBV DNA S h, / / ( ) g 10 min,215, # 150,1/ 10 3 mol/ L (ph 510) DNA, 70 % 1,DNA 20 (2) (PCR) : HBV l ) (2) # 150 S,C82 ( I) (T) S S5 : 5 - CTA GGA TCC ATG GAGAGC ACA ACA TCA G23( nt ), C82S3 : 5 2GCC GAA TTC TCA AAT GTA TAC CCA AAG AC23( nt ) C, Pc1 : 5 2CCC 3. YIC C PCR AAG GTC TTA CAT AAG AGG 23( nt ), Pc2 : 5 2GGT GGC CAA ATT CAT CAA CT23 HBV DNA C/ C ( nt ),7 C, (44 ) (3) PCR : S 681 bp, C ( ) YIC, 470 bp 50 l, 200 HBV C mol/l 4 dntp,1 PCR,10 pmol/ L C82S5 C82S3 Pc1 Pc2,Taq DNA 215U (C/ C,C,1 ) :94 3 min,94 (4) Vector NTI ( Invitrogen C/ C C, YIC HBV DNA > 2 log 10, HBeAg, HBV DNA, HBeAg (1), 6 S a ( , 126 [7 126 I/ T, a ] YIC, HBV S 7 (0 ) (44 ) 4. YIC C ( # 52) 44 T1762A/ A1764G, 30s,55 30s,72 1 min, ( # 180 # 213) A/ 1764G,44 10 minpcr 1 % 1762T/ 1764A# 92 # 241 C, (3)
3 Journal of Microbes and Infection,June 2007,Vol 2,No. 2 1 YIC HBV DNA HBeAg 2HBe Fig 1. Kinetics of serum HBV DNA, HBeAg, anti2hbe in seven YIC treated patients who showed rebound in viral load # 150 was injected with placebo, # 92 was non2responder, the others were responders during treatment, but virus rebound during follow2up1 (A) : Kinetics of serum HBeAg ; (B) : Kinetics of serum HBeAb ; (C) : Kinetics of HBV DNA1 2 YIC S a Fig 2. Sequence alignment of theadeterminant of S protein in seven YIC treated patients who showed rebound in viral load The amino acids in theadeterminant of S protein showed no changes in sample collected at 0 and 44 weeks (the shaded region shows with sequences different from the consensus sequences summarized in data from GenBank1 # 150 was immunized with placebo, and at 126 residue, amino acid I/ T does not change the antigenicity ofadeterminant) 1
4 Journal of Microbes and Infection,June 2007,Vol 2,No YIC C Fig 3. Sequence alignment of C promoter region in seven YIC treated patients who showed rebound in viral load Nucleotide mutations in the core promoter region of samples collected at 0 and 44 weeks from 7 patients (the shaded region shows sequences different from the consensus sequences summarized in data from GenBank) 1 2S22HBsAg [10 ] HBsAg2 2 ( YIC) S,, C/ C C HBV,, S,, [8 ], IFN, HBV DNA, ( / ),,NK, YIC, [9 ] HBV, 1 YIC HBeAg 1, 2HBe [6 ],, S, a HBsAg ( # 150) I,
5 Journal of Microbes and Infection,June 2007,Vol 2,No T,,T/ I T/ S T/ N, 31 Zheng BJ, Ng MH, He LF, et al1 Therapeutic efficacy of [7 a ], hepatitis B surface antigen2antibodies recombinant composite in HBsAg transgenic, mice1 Vaccine,2001,19 : Zheng BJ, Zhou J, Qu D, et al1 Selective functional deficit in dendritic cell2t cell interaction is a crucial mechanism in 60g YIC 30 g YIC chronic hepatitis B virus infection1 J Viral Hepat, 2004, 11 : ( ) YIC Xu DZ, Huang KL, Zhao K, et al1 Vaccination with PCR, recombinant HBsAg2HBIG complex in healthy adults1, HBV Vaccine,2005,23 : YIC 61 Yao X, Zheng BJ, Zhou J, et al1 Therapeutic effect of, S hepatitis B surface antigen2antibody complex is associated with HBsAg 20, cytolytic and non2cytolytic immune responses in hepatitis B patients1 Vaccine,2007,25 : S, YIC 71,,,1 HBV 1 C, 3 C 1762/ 1764, 2 C, C Resist Updat,2001,4 : C 1762/ 91 Kakimi K, Lane TE, Chisari FV, et al1 Inhibition of hepatitis 1764 virusreplication by activated NK T cells does not require [11 ], 5 1 inflammatory cell recuritment to the liver1 J Immunol, 2001, 5 C, 167 : Pol S, Nalpas B, Driss F, et al1 Efficacy and limitations of a specific immunotherapy in chronic hepatitis B1 J Hepatology, 11 Wen YM, Xiong SD, Zhang W1 Solid matrix antibody2antigen complex can clear viremia and antigenemia in persistent duck hepatitis B virus infection1 J Gen Virol,1994,75 : Wen YM, Qu D, Zhou SH, et al1 Antigen2antibody complex as therapeutic vaccine for viral hepatitis B1 Intern Rev Immunol,1999,18 : ( ), 2006,33 : Fischer KP, Gutfreund KS, Tyrrwll DL1 Lamivudine resistance in hepatitis B : Mechanisms and clinical implications1 Drug 2001,34 : ,,,1 C C S2 1,2006,24 : ( : ) ( 67 ) 3. Ma S, Boerner J E, Tiong Yip C, et al. NIM811, a cyclophilin inhibitor, exhibits potent in vitro activity against hepatitis c virus alone or in combination with alpha interferon. Antimicrob Agents Chemother,2006, 50 : Wieland SF, Chisari FV. Stealth and cunning : hepatitis B and hepatitis C viruses. J Virol,2005, 79 : Barber DL, Wherry EJ, Masopust D, et al. Restoring function in exhausted CD8 T cells during chronic viral infection. Nature, 2006, 439 : Biswal BK, Cherney MM, Wang M,et al. Crystal structures of the RNA2dependent RNA polymerase genotype 2a of hepatitis C virus reveal two conformations and suggested mechanisms of inhibition by non2nucleoside inhibitors. J Biol Chem 2005, 280 : ( : )
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