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. 1992 May 15;89(10):4392–4396. doi: 10.1073/pnas.89.10.4392

2',5'-Bis-O-(tert-butyldimethylsilyl)-3'-spiro-5''-(4''-amino-1'',2''- oxathiole-2'',2'-dioxide)pyrimidine (TSAO) nucleoside analogues: highlyselective inhibitors of human immunodeficiency virus type 1 that are targeted at the viral reverse transcriptase.

J Balzarini 1, M J Pérez-Pérez 1, A San-Félix 1, D Schols 1, C F Perno 1, A M Vandamme 1, M J Camarasa 1, E De Clercq 1
PMCID: PMC49088  PMID: 1374900

Abstract

A series of pyrimidine nucleoside analogues containing [2',5'-bis-O-(tert-butyldimethylsilyl)-3'-spiro-5''-(4''-amino- 1'',2''-oxathiole-2'',2''-dioxide)]-beta-D-ribofuranose as the pentose were found to inhibit human immunodeficiency virus type 1 [HIV-1(IIIB)] replication at a concentration of 0.06-0.8 microM but were not cytotoxic at a 1000- to 10,000-fold higher concentration. These nucleoside derivatives were also effective against various other HIV-1 strains, including those resistant to 3'-azido-3'-deoxythymidine, but not against HIV-2, simian immunodeficiency virus, Moloney murine sarcoma virus, or other RNA or DNA viruses. They proved to be highly specific inhibitors of the RNA-dependent DNA polymerase function of the HIV-1 reverse transcriptase, showing no marked inhibition of the HIV-1 reverse transcriptase-associated DNA-dependent DNA polymerase activity, HIV-2 reverse transcriptase, DNA polymerase alpha, herpes simplex virus 1 DNA polymerase, or Thermus aquaticus DNA polymerase.

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Selected References

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