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Immune responses but no protection against SHIV by gene-gun delivery of HIV-1 DNA followed by recombinant subunit protein boosts.

Abstract：

:The efficacy of combining immunization with human immunodeficiency vitus type 1 (HIV-1) DNA and HIV-1 recombinant proteins to obtain protection from chimeric simian/human immunodeficiency virus (SHIV) was determined. Four cynomolgus monkeys received four gene-gun immunizations intraepidermally of plasmid DNA encoding HIV-1lai env (gp160), gag, tat, nef, and rev proteins. Ten micrograms of DNA was used per immunization. The animals were boosted twice intramuscularly with 50 microgram of HIV-1lai Env (MicroGeneSys), Gag, Tat, Nef, and Rev recombinant proteins mixed in Ribi adjuvant. The antibody responses were amplified following the administration of the recombinant subunit boosts. One month after the final subunit immunization, the vaccinated animals together with four control animals were challenged intravenously with 10 monkey infectious doses of SHIV that expresses the env, tat and rev genes of HIV-1 and gag and nef from SIV. However, only low titers of neutralizing antibodies were present at the day of challenge. The consecutive HIV-1 DNA and recombinant protein immunizations induced B- and T-cell responses but not protection against SHIV replication nor reduction of the viral load.

journal_name

Virology

journal_title

Virology

authors

Putkonen P,Quesada-Rolander M,Leandersson AC,Schwartz S,Thorstensson R,Okuda K,Wahren B,Hinkula J

doi

10.1006/viro.1998.9379

subject

Has Abstract

pub_date

1998-10-25 00:00:00

pages

293-301

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(98)99379-5

journal_volume

250

pub_type

杂志文章

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