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1994-10-25
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Document 3233
DOCN M94A3233
TI Salivary anti-HIV activity.
DT 9412
AU Nagshunmugam T; Friedman H; Davis C; Abrams W; Malamud D; U. Penn. Dent.
Med. Phila. 19104.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):122 (abstract no. PA0108). Unique
Identifier : AIDSLINE ICA10/94369342
AB OBJECTIVE: Human saliva decreases HIV-1 infectivity. Some of this
inhibition requires filtration and is associated with viral aggregation.
The present study describes the nature of a second type of salivary
anti-HIV activity. METHODS: Submandibular saliva was collected from 15
seronegative individuals. After dialysis and lyophilization, the
material was incubated with virus for 2-60 min and exposed to
PHA-stimulated PBMCs for 3 hrs. Cells were washed and incubated for 7
days and the amount of virus determined by p24 ELISA. Similar
experiments were carried out with HSV, HIV-2 and SIV. The effects of
submandibular saliva on the binding of anti-receptor antibodies to PBMCs
was used to define the site of action of the salivary inhibitor.
RESULTS: Saliva obtained from several individuals displayed potent
anti-HIV activity not associated with viral aggregation. Salivary
inhibition is time and concentration dependent, and appears to be HIV-1
specific. Little inhibition is seen for HSV, and no inhibition of viral
infectivity is seen with HIV-2 or SIV. Incubation of PBMCs with
submandibular saliva at high concentration appears to block the binding
of anti-receptor antibodies, but at concentrations present in the in
vitro infectivity assay, no inhibition was detected. CONCLUSIONS: Human
saliva appears to contain two types of anti-HIV activity. The first type
only seen after filtration through a nitrocellulose filter, is
associated with viral aggregation. The second type of activity does not
require filtration. This latter activity appears to be specific for
HIV-1, and if active in vivo, could explain the lack of oral
transmission.
DE Acquired Immunodeficiency Syndrome/TRANSMISSION *Antiviral Agents
Cells, Cultured Comparative Study Human HIV Seronegativity
HIV-1/*PHYSIOLOGY/PATHOGENICITY HIV-2/PHYSIOLOGY
Lymphocytes/*MICROBIOLOGY Saliva/*PHYSIOLOGY Simplexvirus/PHYSIOLOGY
Submandibular Gland/SECRETION Support, U.S. Gov't, P.H.S.
SIV/PHYSIOLOGY *Virus Replication MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).