[Immunization against the human immunodeficiency virus in Zaire]. / Immunisation contre le virus de l'immunodéficience humaine au Zaïre.
Med Trop (Mars)
; 48(4): 417-23, 1988.
Article
en Fr
| MEDLINE
| ID: mdl-3221792
ABSTRACT
PIP: The 1st experimental immunization of humans against the AIDS retrovirus HIV-1 was begun in November 1986 among a group of HIV-seronegative healthy volunteers. A priming, involving a vaccine virus recombinant (V25) expressing Gp 160 env determinants of HTLV-III B at the surface of the infected cells was utilized. This priming, which induced a weak immune reaction, was performed on HIV-seronegative French and Zairian individuals living in Kinshasa, Zaire. These results prompted a boost to the primary immune response. 4 different protocols were used: the slow drip intravenous infusion with paraformaldehyde-fixed autologous cells infected with V25; repeated scarification with V25 for the 2nd protocol; scarifications with fragments of Gp 120 env protein; and intramuscular injections of purified autologous cell membrane infected with V25. The results of the immune reaction obtained after these boosts indicated the following: The last 3 protocols showed a cell- mediated immunity (CMI) that did not significantly enhance in comparison with CMI obtained after V25 priming alone. Moreover, the sera showed low and variable neutralizing antibody titers 1-4 months after boosting. By contrast, boosting with V25 infected fixed cells (D.Z.) provided strong humoral and cellular group specific anamnestic immune responses. Indeed, high levels of antibodies to viral envelope and neutralizing antibodies against divergent HIV-1 strains were observed. Group- specific CMI and cell mediated cytotoxicity were enhanced by boosts. Skin tests showed high mediated and delayed hypersensitivity to Gp 160 in vivo. For the 1st time, these results show that an immune state against HIV can be obtained in a man. (author's modified)
Palabras clave
Africa; Africa South Of The Sahara; Antibodies--analysis; Biology; Delivery Of Health Care; Developing Countries; Diseases; Evaluation; Examinations And Diagnoses; French Speaking Africa; Health; Health Services; Hiv Infections--prevention and control; Immunity; Immunization; Immunologic Factors; Immunological Effects--men; Laboratory Examinations And Diagnoses; Middle Africa; Physiology; Primary Health Care; Viral Diseases; Zaire
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Banco de datos:
MEDLINE
Asunto principal:
Vacunas Virales
/
Síndrome de Inmunodeficiencia Adquirida
/
VIH
Límite:
Animals
/
Humans
País/Región como asunto:
Africa
Idioma:
Fr
Año:
1988
Tipo del documento:
Article