English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The L enantiomer of 2',3'-dideoxycytidine (DDC) was recently shown to inhibit selectively human immunodeficiency virus type 1 (HIV-1) in vitro. In the current study, the potent anti-HIV activity of L-DDC was confirmed and extended to several HIV-1 and HIV-2 strains in various cell culture systems, including primary human lymphocytes and macrophages. Furthermore, its 5-fluoro congener, beta-L-2',3'-dideoxy-5-fluorocytidine (L-FDDC), was found to have more potent anti-HIV activity and a higher therapeutic index in acutely infected human peripheral blood mononuclear cells. These compounds had no marked activity against HIV-1 isolates resistant to the oxathiolane pyrimidine nucleosides (-)-beta-L-2',3'-dideoxy-5-fluoro-3'-thiacytidine [(-)-FTC] and (-)-beta-L-2',3'-dideoxy-3'-thiacytidine, but 3'-azido-3'-deoxythymidine (AZT)-resistant viruses were susceptible to L-DDC and L-FDDC. Cytotoxicity studies with human myeloid progenitor cells indicated that L-DDC and L-FDDC had median inhibitory concentrations comparable to those of AZT, DDC, and FDDC, but L-DDC and L-FDDC were significantly less toxic than AZT, DDC, and FDDC when erythroid progenitor cells were used. L-FDDC had the highest selectivity indices (6,000 and 9,000 for erythroid and myeloid progenitor cells, respectively) of all the compounds evaluated. Further preclinical development of L-FDDC is warranted in order to determine its potential usefulness in the treatment of HIV infections.

Anti-human immunodeficiency virus activities of the beta-L enantiomer of 2',3'-dideoxycytidine and its 5-fluoro derivative in vitro