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1996-02-26
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Document 0749
DOCN M9620749
TI Human sperm and spermatogonia express a galactoglycerolipid which
interacts with gp120.
DT 9602
AU Brogi A; Presentini R; Piomboni P; Collodel G; Strazza M; Solazzo D;
Costantino-Ceccarini E; Institute of General Biology, University of
Siena, Italy.
SO J Submicrosc Cytol Pathol. 1995 Oct;27(4):565-71. Unique Identifier :
AIDSLINE MED/96076722
AB Sexual transmission is a major mode of spread of HIV-1 although the
mechanisms involved remain to be elucidated. The role of spermatozoa as
carriers of the HIV is supported by recent publications, while the
expression of the CD4 on the membrane of the sperm has not yet been
demonstrated. The data reported in this paper show that a glycolipid
molecule, most likely the galactosyl-alkyl-acylglycerol, structurally
similar to galactosylceramides, is present on the surface membrane of
the spermatozoa. Consistent with a structure similar to
galactosylceramide, the sperm glycolipid is capable of binding the gp120
as demonstrated utilizing an improved ELISA assay which favors
sensitivity and specificity. Immunocytochemistry of testicular tissue
shows the presence of this glycolipid on the membrane of immature germ
cells, preferentially in the spermatogonia. These data indicate that
human sperm express a glycolipid similar in structure to the receptor
for HIV described on the CD4- neural and colonic epithelial cell lines,
and moreover suggest that this glycolipid could also function as HIV
receptor and possibly be implied in its transmission. The demonstration
that this molecule is also expressed by the spermatogonia suggests its
involvement in the interaction of the HIV with spermatogonia, as
recently reported, and could explain the inhibition of spermatogenesis
observed in AIDS patients.
DE Enzyme-Linked Immunosorbent Assay Glycolipids/*METABOLISM Human HIV
Envelope Protein gp120/*METABOLISM Immunohistochemistry Male
Spermatogonia/*METABOLISM Spermatozoa/*METABOLISM Support, Non-U.S.
Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).