title: Protection of macaques against a SHIV with a homologous HIV-1 Env and a pathogenic SHIV-89.6P with a heterologous Env by vaccination with multiple gene-deleted SHIVs.
abstract: To evaluate the potential of SHIVs as anti-HIV-1 live vaccines, we constructed two gene-deleted SHIVs, designated SHIV-drn and SHIV-dxrn. The former lacks vpr/nef and the latter lacks vpx/vpr/nef. Four macaques that had been vaccinated with SHIV-drn were challenged with SHIV-NM-3rN, which has an HIV-1 Env that is the same as that of SHIV-drn. No challenge virus was detected by DNA PCR in, or recovered from, two of the macaques. In the other two, challenge virus was detected once and twice, respectively. Plasma viral loads were much lower than those in unvaccinated controls. Another four macaques were vaccinated with SHIV-dxrn. These macaques showed resistance but less than that of SHIV-drn-vaccinated macaques. When the two SHIV-drn-vaccinated macaques were challenged with pathogenic SHIV-89.6P, which has an HIV-1 Env that is antigenically different from that of SHIV-drn, replication of the challenge virus was restricted, and the usual decrease in the number of CD4(+) cells was prevented. In this protection, it is noteworthy that protection involved not only neutralizing antibodies and killer cell activity, but also other unknown specific and nonspecific immunity elicited by the infection.
authors.affiliation: Institute for Virus Research, Kyoto University, Kyoto, 606-8507, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ui
authors.forename: T
authors.initials: T
authors.lastname: Kuwata
authors.forename: T
authors.initials: T
authors.lastname: Igarashi
authors.forename: K
authors.initials: K
authors.lastname: Ibuki
authors.forename: Y
authors.initials: Y
authors.lastname: Miyazaki
authors.forename: I L
authors.initials: IL
authors.lastname: Kozyrev
authors.forename: Y
authors.initials: Y
authors.lastname: Enose
authors.forename: T
authors.initials: T
authors.lastname: Shimada
authors.forename: H
authors.initials: H
authors.lastname: Uesaka
authors.forename: H
authors.initials: H
authors.lastname: Yamamoto
authors.forename: T
authors.initials: T
authors.lastname: Miura
authors.forename: M
authors.initials: M
authors.lastname: Hayami
mesh_terms: D016915:AIDS Vaccines / Q000008:administration & dosage* / Q000235:genetics / Q000276:immunology; D000818:Animals; D000956:Antigens, Viral / Q000276:immunology; D017353:Gene Deletion; D015693:Gene Products, nef / Q000235:genetics / Q000276:immunology; D016336:Gene Products, vpr / Q000235:genetics / Q000276:immunology; D015497:HIV-1 / Q000235:genetics / Q000276:immunology*; D006801:Humans; D008253:Macaca mulatta; D008297:Male; D016097:Simian Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D015302:Simian Immunodeficiency Virus / Q000235:genetics / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology; D014759:Viral Envelope Proteins / Q000235:genetics / Q000276:immunology*; D054334:Viral Regulatory and Accessory Proteins / Q000235:genetics / Q000276:immunology; D054311:nef Gene Products, Human Immunodeficiency Virus; D054325:vpr Gene Products, Human Immunodeficiency Virus
chemical_list: D016915:AIDS Vaccines; D000956:Antigens, Viral; D015693:Gene Products, nef; D016336:Gene Products, vpr; C074286:VPX protein, Human immunodeficiency virus 2; C513059:VPX protein, Simian immunodeficiency virus; D014614:Vaccines, Synthetic; D014759:Viral Envelope Proteins; D054334:Viral Regulatory and Accessory Proteins; D054311:nef Gene Products, Human Immunodeficiency Virus; D054325:vpr Gene Products, Human Immunodeficiency Virus