期刊
AIDS
卷 17, 期 4, 页码 481-486出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00002030-200303070-00002
关键词
AIDS; HIV; RNase; eosinophil-derived neurotoxin; alloantigen-stimulation; HIV-inhibitory factor
资金
- PHS HHS [N01-C0-12400] Funding Source: Medline
Objective: This study was performed to determine whether ribonucleases (RNases) contribute to the soluble HIV-1 inhibitory activity that results from the recognition of HLA alloantigens. Design and methods: Supernatants from mixed lymphocyte reactions of peripheral blood mononuclear cells from healthy HLA-discordant individuals exhibited HIV-1 inhibitory activity (alloantigen-stimulated factors; ASF). These supernatants were tested for their sensitivity to heating (90degreesC for 3 min), and for the presence of three RNases belonging to the RNase A superfamily: eosinophil-clerived neurotoxin (EDN); RNase A; and angiogenin. Polyclonal antibodies specific for these RNases were used for Western blot analysis of the ASF, as well as for blocking the HIV-1 inhibitory activity of ASF. In addition, an RNase inhibitor (RI) was used to determine whether the anti-viral activity of ASIF was due to RNase activity. Results: HIV-1 inhibitory activity of ASF was: (i) resistant to heat treatment; (ii) blocked by 58% with an antibody specific for EDN, but not with antibodies against RNase A or angiogenin; and (iii) blocked by 65-100% with an RI. Moreover, Western blot analysis with an anti-EDN antibody detected EDN in the ASF. Conclusion: These findings indicate that the majority of the soluble HIV-1 inhibitory activity contained in the supernatants of mixed lymphocyte reactions is due to EDN or a closely related RNase. (C) 2003 Lippincott Williams Wilkins.
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