4.5 Article

Thio-substituted derivatives of 4-amino-pyrazolo[3,4-d]pyrimidine-6-thiol as antiproliferative agents

Journal

FUTURE MEDICINAL CHEMISTRY
Volume 13, Issue 18, Pages 1515-1530

Publisher

Newlands Press Ltd
DOI: 10.4155/fmc-2021-0131

Keywords

4-amino-1-H-pyrazolo[3; 4-d]pyrimidine-6-thiol; antiproliferative activity; apoptosis; cancer; cell cycle; pyrazolo pyrimidine; U937

Funding

  1. PRIN [2017E84AA4-002]

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The study aimed to identify new compounds for potential antiproliferative drug candidates, with the most effective compounds showing selectivity against cancer cells. The presence of a substituted pyrazolo[3,4-d]pyrimidine core and substituents at the thiol function in the 6-position were found to be essential for this antiproliferative activity.
The current study was designed to identify new compounds as potential antiproliferative drug candidates. Synthesis of heteroaromatic bicyclic and monocyclic derivatives as purine bioisosters was employed. Their antiproliferative activity was studied against U937 cancer cells. The most effective compounds were evaluated for their selectivity against cancer cells, the possible mechanism of cell death, and their interference with DNA replication. Among the synthesized compounds, only three (4b, 4j and 4l) demonstrated a value of IC50 less than 20 mu M. However, two of them (4b and 4l) were specific against cancer cells, with 4l presenting high selectivity. The presence of substituted pyrazolo[3,4-d]pyrimidine core is as essential for this activity as the presence of substituents at the thiol function in 6-position.

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