EFFECT OF NONPROTECTIVE VACCINATION ON ANTIBODY-RESPONSE TO SUBSEQUENT HUMAN-IMMUNODEFICIENCY-VIRUS INFECTION

被引:19
作者
PINCUS, SH [1 ]
MESSER, KG [1 ]
HU, SL [1 ]
机构
[1] BRISTOL MYERS SQUIBB PHARMACEUT RES INST,SEATTLE,WA 98121
关键词
HIV; AIDS; VACCINE; VACCINIA;
D O I
10.1172/JCI116937
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
We have investigated the systemic anti-HIV antibody response in chimpanzees who were immunized,vith live vaccinia containing either the HIV envelope glycoprotein (gp160(IIIB)) or a control antigen (herpes simplex virus glycoprotein D) and then challenged with either a high dose (300,000 TCID50) or low dose(100 TCID50) of HIVIIIB. HIV was subsequently isolated from all animals, indicating failure of the vaccination to protect against HIV infection. Serum antibody responses were evaluated before immunization, at the time of challenge with HIV, and at multiple time points in the 9 mo after challenge. Immunization resulted in a more rapid rise of antibody to gp160 in both high and low dose animals. Antibodies to the V3 loop induced upon infection were unaffected by immunization. In low dose animals, neutralizing antibody rose more rapidly and to higher levels in the immunized animals as compared with the control. There was no difference in neutralizing antibodies between immunized and control chimpanzees in the high dose group. Epitope mapping of the anti-gp160 response indicated that immunization with gp160 vaccinia induced a postinfection antibody response to a region of gp41 (amino acids 718-743) that was not immunogenic in control-vaccinated animals. These data indicate that failed vaccination with the HIV envelope can alter both the timing and epitope specificity of the subsequent anti-HIV antibody response. These studies also define the evolution and fine specificity of the antibody response during the critical period immediately postinfection.
引用
收藏
页码:140 / 146
页数:7
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