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Updated: Sep 27, 2026

Evaluation of the Efficacy And Toxicity of RNAs Targeting HIV-1 Production for Use in Gene or Drug Therapy
Published on: September 5, 2016
Ribonuclease is partly responsible for the HIV-1 inhibitory effect activated by HLA alloantigen recognition
Maria T Rugeles1, Charles M Trubey, Victoria I Bedoya
1Universidad de Antioquia, Medellin, Colombia, the Experimental Immunology Branch, NCI, NIH, Bethesda, USA.
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 (90 degrees C for 3 min), and for the presence of three RNases belonging to the RNase A superfamily: eosinophil-derived 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 ASF 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.
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