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M94A2424.TXT
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Document 2424
DOCN M94A2424
TI Susceptibility of human fetal cells to HIV infection, in vitro and in
vivo in the SCID-HU model.
DT 9412
AU Touraine JL; Sanhadji K; Firouzi R; Transplantation & Clinical
Immunology Unit, INSERM U80, Hop. E.; Herriot, Lyon, France.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):307 (abstract no. PC0157). Unique
Identifier : AIDSLINE ICA10/94370151
AB OBJECTIVE: Pre and perinatal HIV transmission from mother to child
occurs in 17% of cases in Europe and North America, 28% in Africa.
Susceptibility of human fetal cells to HIV infection has been studied to
help develop a preventive strategy. METHODS: Human tissues have been
collected from non-infected fetuses of various ages, immediately after
death. Liver, thymus, spleen and blood cells have been incubated with
HIV1 or HIV2 and their infection checked by measure of RT activity, p24
release, DNA and RNA PCR, co-culture with normal CD4+ lymphocytes.
Similar experiments were carried out in SCID-hu mice in vivo. RESULTS:
At 9 weeks postfertilization, all fetal cells were resistant to HIV
infection in our experimental conditions. After 11 weeks, they could be
infected by HIV1 or HIV2. Identical cells transplanted into SCID mice to
construct a SCID-hu model rendered the animals susceptible to HIV
(infection of human cells present in these mice, in more than 90% of
inoculated animals, whether HIV was injected in the graft itself or
intravenously). DISCUSSION AND CONCLUSIONS: Human fetuses can be
infected with HIV1 or HIV2 as soon as the end of the first trimester of
gestation. Due to placenta protection, the infection actually occurs
seldom before the end of the second trimester. In vitro and in vivo
models are now ready for analysis of potential prophylaxis using
specific antibodies or chemotherapies.
DE Animal Cell Transplantation Cells, Cultured Female
Fetus/*MICROBIOLOGY Human HIV
Infections/CONGENITAL/MICROBIOLOGY/PREVENTION & CONTROL HIV-1/*GROWTH &
DEVELOPMENT HIV-2/*GROWTH & DEVELOPMENT Infant, Newborn Mice Mice,
SCID Pregnancy Pregnancy Complications, Infectious/MICROBIOLOGY
MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).