ABSTRACT
@#Objective To investigate the antitumor immunity induced by tumor derived mixed heat shock protein/peptide(mHSPs),interleukin-12(IL-12)and Cyclophosphamide(Cy).MethodsPurified mixed HSP was prepared from tumor by S180 protein extraction and purification,SDS-PAGE,Western blot and animal experiment were applied for mixed HSPs analysis.ResultsThe proliferation of cytotoxic T lymphocyte(CTL)cocultured in the mHSPs+Cy+IL-12 group was significantly remarkable and the content of CD8+ CTLs was significantly more in comparison with the other groups(P<0.01).To the tumor bearing mice,mHSPs+Cy+IL-12 group showed partial therapeutic efficacy,the averaged survival period was over 60 d,and 90% of the mice in this group got long period tumor free survival(>90d),obvious difference(P<0.05)from the other groups.ConclusionTumor derived mixed HSPs can induce powerful antitumor immune efficacy and show favorable therapeutic efficacy.
ABSTRACT
We have reported RPS-Vax system by introducing multiple cloning site (MCS) and 3C-protease cutting site at the N-terminal end of the poliovirus Sabin 1 cDNA. Potential vaccine genes can be easily introduced into recombinant polioviral genome and expressed during the viral replication as a part of virus polyprotein and subsequently processed from the mature viral protein by the poliovirus-specific 3C-protease. However, these poliovirus vector-mediated chimeric viral vaccine was not efficient to induce the cell-mediated immunity because of its rapid cytolytic capacity. In order to make CTL-inducing vaccine vector, we integrated a protein transduction domain (PTD) into the pRPS-Vax vector system right ahead of the MCS, named RPS-Vax/PTD. We have incorporated the HCV core (N-terminal 100aa) antigen into the MCS of pRPSvax-PTD vector, followed by production of chimeric virus, named RPSvax-PTD/HCVc. The chimeric virus was genetically stable during the serial passages. Replication capacity of the RPSvax-PTD/HCVc was 1~2 log lower than that of RPS-Vax control virus. These chimeric virus was very efficient to inducing antigen-specific IgG2a in the immunized mice, implying that the recombinant virus has a capacity to induce HCV-specific Th1 type immunity in the immunized animals or humans.
Subject(s)
Animals , Humans , Mice , Clone Cells , Cloning, Organism , DNA, Complementary , Genome , Hepatitis C , Hepatitis , Immunity, Cellular , Immunoglobulin G , Poliovirus , Serial PassageABSTRACT
We have reported RPS-Vax system by introducing multiple cloning site (MCS) and 3C-protease cutting site at the N-terminal end of the poliovirus Sabin 1 cDNA. Potential vaccine genes can be easily introduced into recombinant polioviral genome and expressed during the viral replication as a part of virus polyprotein and subsequently processed from the mature viral protein by the poliovirus-specific 3C-protease. However, these poliovirus vector-mediated chimeric viral vaccine was not efficient to induce the cell-mediated immunity because of its rapid cytolytic capacity. In order to make CTL-inducing vaccine vector, we integrated a protein transduction domain (PTD) into the pRPS-Vax vector system right ahead of the MCS, named RPS-Vax/PTD. We have incorporated the HCV core (N-terminal 100aa) antigen into the MCS of pRPSvax-PTD vector, followed by production of chimeric virus, named RPSvax-PTD/HCVc. The chimeric virus was genetically stable during the serial passages. Replication capacity of the RPSvax-PTD/HCVc was 1~2 log lower than that of RPS-Vax control virus. These chimeric virus was very efficient to inducing antigen-specific IgG2a in the immunized mice, implying that the recombinant virus has a capacity to induce HCV-specific Th1 type immunity in the immunized animals or humans.