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M94A2430.TXT
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Document 2430
DOCN M94A2430
TI Risk factors for vertical transmission of HIV-1.
DT 9412
AU Ometto L; De Rossi A; Zanotto C; Maccabruni A; Caselli D; Chieco-Bianchi
L; Inst. Oncology, University of Padova, Italy.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):306 (abstract no. PC0155). Unique
Identifier : AIDSLINE ICA10/94370145
AB OBJECTIVE: To define risk factors for vertical transmission of HIV-1.
STUDY POPULATION: Fifty-two HIV-1 infected mothers. Mother-child pair
samples were obtained at time of delivery. METHODS: HIV-1 copy number in
patient PBMC (Peripheral Blood Mononuclear Cells) was determined by
quantitative DNA-PCR. Plasma samples were tested for HIV-1 p24 free
antigen, p24 immunocomplexed antigen and antibodies to the V3 loop,
using Elisa assays. The biological phenotype of viral isolates from
mothers was defined according to cell tropism and syncytium inducing
capability by viral culture in primary lymphocytes and macrophages, and
in MT-2 cells. RESULTS: Of 52 mothers enrolled in this study, 6 mothers
transmitted HIV infection to their child. We did not find a correlation
between CD4+ count, p24 antigenemia, presence of antibodies to the V3
loop, viral burden in PBMC, and mother to child transmission of HIV-1.
Of particular relevance, we found that viral isolates from all
transmitting mothers macrophage-tropic or macrophage-lympho-amphotropic,
while isolates from the majority of non-transmitting mothers did not
show this pattern. CONCLUSIONS: These findings strongly suggest that
monocytotropism of the maternal viral isolate is critical for vertical
transmission of HIV-1.
DE Female Human HIV Antigens/ANALYSIS HIV
Infections/IMMUNOLOGY/MICROBIOLOGY/*TRANSMISSION *HIV-1/IMMUNOLOGY
Infant, Newborn Leukocyte Count Pregnancy *Pregnancy Complications,
Infectious/IMMUNOLOGY/MICROBIOLOGY Risk Factors T4 Lymphocytes
MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).