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M94A3208.TXT
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Document 3208
DOCN M94A3208
TI Adaptation of human immunodeficiency virus type 2 (HIV-2) primary
isolates to the in vivo replication in macaque.
DT 9412
AU Wakrim L; Nicol I; Le Grand R; Boussin F; Vaslin B; Roques P;
Bayon-Auboyer MH; Dormont D; Laboratoire de Neuropathologie
experimentale et Neurovirologie; CEA, CEN/FAR, DSV/DPTE/SSA,
Fontenay-Aux-Roses, France.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):129 (abstract no. PA0134). Unique
Identifier : AIDSLINE ICA10/94369367
AB OBJECTIVES: To obtain a human immunodeficiency virus type 2 isolate
(HIV-2) reproductively and persistently infectious for macaque aiming to
generate a suitable animal model for vaccine and therapeutic strategies.
METHODS: Two macaques (macaca fascicularis) H100 and 306A were
intravenously inoculated with respectively two HIV-2 isolates: HIV-2
(33215), a primary isolate obtained from one HIV-2 ROD infected macaque
which died from AIDS and PO-306A, a human HIV-2 primary isolate screened
for its capacity to replicate in macaques PBMCs. Two successive
transfusions of 10 ml whole blood were done from each of these macaques
at early stages of infection into naive recipients (second and 3th in
vivo passage). A 4th in vivo passage was done for the PO-306A isolate.
Infection was monitored weekly by virus recovery from the PBMCs in
coculture, by PCR, by P27 antigen detection and by seroconversion
measured by ELISA and Western Blot. RESULTS: At each passage the animals
were positive for virus isolation, PCR, and seroconversion. In the first
transfused animal (second in vivo passage) which received the PO-306A
isolate, infection was more severe and clinical signs like
polyadenopathy and diarrhea were observed. All sera were negative for
the P27 antigen detection by the P27-SIV Coulter kit except at the 4th
passage. The virus isolated by coculture from monkey PBMCs at this later
passage induces higher syncytia formation and higher level of reverse
transcriptase activity. DISCUSSION: Taken together the importance and
chronological appearance of different infection criteria, the PO-306A
isolate seems to be adapted to replicate in macaque. The positive P27
antigenemia obtained indicates that we can increase the level of in vivo
replication by successive transfusions in naive recipients. CONCLUSION:
In the attempt to generate a suitable animal model to study the
infectivity, the pathogenicity and therapy the constitution of a virus
stock is needed. Then the PO-306A virus isolate adaptated to replicate
reproductively in macaque will be an interesting candidate.
DE Animal Blood Transfusion Disease Models, Animal Giant
Cells/IMMUNOLOGY Human HIV Antigens/ANALYSIS HIV
Seropositivity/IMMUNOLOGY HIV-2/ISOLATION & PURIF/*PHYSIOLOGY
Lymphocytes/IMMUNOLOGY/MICROBIOLOGY Macaca fascicularis/*MICROBIOLOGY
Polymerase Chain Reaction Reagent Kits, Diagnostic Reverse
Transcriptase/ANALYSIS *Virus Replication MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).