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- W1592791766 abstract "Human T cells (H9), infected with the HTLV-IIIB strain of the human immunodeficiency virus (HIV-1), have been used to study the alteration of 2',5'-oligoadenylate [2'-5')A) metabolism in relation to virus production. The synthesis of (2'-5')A was determined to proceed in close association with the nuclear matrix. After HIV infection the (2'-5')A synthetase activity increased from 1.1 to 1.5 pmol of (2'-5')A synthesized/100 micrograms of nuclear matrix protein (during a 3-h in vitro incubation period) to 8.2 pmol at day 3 after infection. Then the activity dropped to the initial values. In non-infected H9 cells the (2'-5')A synthetase activity remained unchanged. Simultaneously with the decrease of the (2'-5')A level the cells started to release HIV. At the time of maximum synthetase levels the (2'-5')A-activated endoribonuclease (RNase L) activity strongly increased. Only one protein could be selectively cross-linked to a (2'-5')A derivative in the nuclear matrix from H9 cells; this protein is assumed to be RNase L. Experimental evidence is provided revealing that RNase L degrades HIV transcripts. A correlation could be established between high levels of (2'-5')A and RNase L and a failure of the cells to release HIV. 3'-Azido-3'-deoxythymidine was shown to cause an extension of the time period during which an RNase L-mediated degradation of viral transcripts occurred. The possibility of a novel molecular pharmacologic approach on the level of (2'-5')A metabolism is discussed." @default.
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- W1592791766 date "1989-04-01" @default.
- W1592791766 modified "2023-10-06" @default.
- W1592791766 title "Modulation of Nuclear Matrix-associated 2′,5′-Oligoadenylate Metabolism and Ribonuclease L Activity in H9 Cells by Human Immunodeficiency Virus" @default.
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- W1592791766 doi "https://doi.org/10.1016/s0021-9258(18)83600-6" @default.
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