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1993-01-07
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─ Area: AIDS-HIV - R ─────────────────────────────────────────────────────────
Msg#: 476 Date: 01-05-93 16:23
From: Billi Goldberg Read: Yes Replied: No
To: All Mark:
Subj: (10) CDC SUMMARY 1/4/93
──────────────────────────────────────────────────────────────────────────────
-=> Quoting Billi Goldberg to All <=-
BG> "Protective Effects of a Live Attenuated SIV Vaccine With a Deletion
BG> in the Nef Gene" Science (12/18/92) Vol. 258, No. 5090, P. 1939
BG> (Daniel, Muthiah et al.)
BG> Live attenuated HIV-1 may also be the most potent, effective
BG> vaccine for the prevention of AIDS, write Muthiah D. Daniel et al. of
BG> the New England Regional Primate Research Center, Harvard Medical
BG> School, in Southborough, Mass. Vaccine protection against HIV and
BG> simian immunodeficiency virus (SIV) in animal models is proving to be
BG> a difficult task. The problem is largely attributable to the
BG> persistent, unrelenting nature of HIV and SIV infection once infection
BG> is initiated. SIV with a constructed deletion in the auxillary gene
BG> nef replicates poorly in rhesus monkeys and appears to be
BG> nonpathogenic in this normally susceptible host. Rhesus monkeys
BG> vaccinated with live SIV deleted in nef were completely protected
BG> against challenge by intravenous inoculation of live, pathogenic SIV.
BG> Concern for safety is likely to be the main issue for the eventual
BG> development of the deletion approach. In addition to nef, other
BG> genetic elements can be deleted from HIV-1 to help guarantee
BG> long-term safety. The use of deletion mutants eliminates the
BG> possibility of reversion and helps to guarantee the safety of
BG> inoculation with the attenuated virus. Deletion of nef or of
BG> multiple genetic elements from HIV may provide the means for creating
BG> a safe, effective live attenuated vaccine to protect against AIDS,
BG> conclude the researchers. -!-
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