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1996-02-26
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Document 1071
DOCN M9621071
TI Productive HIV-1 infection of normal human mammary epithelial cells.
DT 9602
AU Toniolo A; Serra C; Conaldi PG; Basolo F; Falcone V; Dolei A; Institute
of Medicine and Public Health, University of Pavia,; Varese, Italy.
SO AIDS. 1995 Aug;9(8):859-66. Unique Identifier : AIDSLINE MED/96014958
AB OBJECTIVE AND DESIGN: To determine the susceptibility of mammary
epithelial cells (MEC) to HIV-1 as breastfeeding is an established route
of HIV transmission, although the origin of virus in breastmilk is
unclear. METHODS: Primary epithelial cell cultures were derived from the
mammary glands of healthy donors; immortalized MEC lines were also used.
HIV infection was followed by detection of infectious particle
production, p24 antigen and viral sequences. RESULTS: Seven out of 11
primary MEC cultures and two out of three MEC lines were productively
infected by HIV-1. Virus replication significantly reduced cell
proliferation, although cell viability was only slightly affected.
Cytopathic changes were not observed. MEC cultures expressed low levels
of surface CD4, galactosylceramide and CD26, but essentially no human
leukocyte antigen (HLA)-DR. Infection of HIV-permissive MEC cells was
associated with the upregulation of surface HLA-DR and CD26. In
contrast, the expression of CD4, tissue-specific markers, adhesion
molecules and growth-factor receptors was downregulated. To a lesser
extent, similar effects were also observed in non-permissive cells.
Hormones (triiodothyronine plus beta-estradiol and prolactin) enhanced
HIV replication, possibly through the stimulation of cellular DNA
synthesis. CONCLUSIONS: We concluded that HIV-1 replication in
ductal/alveolar MEC may be, in part, responsible for the presence of
HIV-1 in milk; that hormones may stimulate virus replication; and that
infection reduces the growth of epithelial cells. Although in vitro HIV
is produced by MEC to a lesser extent than lymphoid cells, MEC-derived
HIV might have selective advantages for the infection of mucosal
epithelial cells during breastfeeding.
DE Breast/CYTOLOGY/*VIROLOGY Breast Feeding Cell Line Disease
Transmission, Vertical Epithelium/CYTOLOGY/VIROLOGY Female
Hormones/PHARMACOLOGY Human HIV
Infections/*ETIOLOGY/TRANSMISSION/VIROLOGY
*HIV-1/PHYSIOLOGY/PATHOGENICITY Infant, Newborn Milk, Human/VIROLOGY
Phenotype Pregnancy Support, Non-U.S. Gov't Virus Replication
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).