Envelope glycoprotein (gp120) from HIV-1 enhances Mycobacterium avium growth in human bronchoalveolar macrophages; an effect mediated by enhanced prostaglandin synthesis.

Abstract:

:Human bronchoalveolar lavage (BAL) macrophages were obtained from normal human volunteers and infected with an AIDS-associated strain of Mycobacterium avium. Infected cells were exposed to purified envelope glycoprotein (gp120) from HIV-1 or to the recombinant non-glycosylated gp120 fragments PBI-RF and PBI-IIIB. Native gp120 increased Myco. avium growth in human cells from six separate donors, whereas the non-glycosylated fragments of gp120 had no such effect. Moreover, gp120 induced a substantial secretion of prostaglandin E2 (PGE2) from macrophages; inclusion of indomethacin blocked the enhanced permissiveness of infected cells treated with gp120. Soluble CD4 also neutralized the effect of gp120. Overall, these results indicate a role for gp120 in the susceptibility of AIDS patients to Myco. avium infections, mediated by an enhanced PGE2 release.

journal_name

Clin Exp Immunol

authors

Denis M

doi

10.1111/j.1365-2249.1994.tb06617.x

subject

Has Abstract

pub_date

1994-10-01 00:00:00

pages

123-7

issue

1

eissn

0009-9104

issn

1365-2249

journal_volume

98

pub_type

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