compound 10e

Compound 10e is a synthetic small molecule derivative of 1-phenylpyrazolo[3,4-d]pyrimidine conjugated with an amino acid. It was developed as a potent inhibitor of human dihydrofolate reductase (hDHFR), an enzyme critical for the synthesis of folate precursors required for DNA replication and cell division. In preclinical in vitro studies, compound 10e demonstrated significant cytotoxic activity against several methotrexate-resistant cancer cell lines, including breast (MCF-7), prostate (PC-3), and pancreatic (BxPC-3) cancers. Its mechanism of action involves binding to the active site of hDHFR, which leads to cell cycle arrest at the G1/S phase and the induction of apoptosis. This apoptotic effect is characterized by the upregulation of proapoptotic proteins such as Bax and various caspases, alongside the downregulation of the antiapoptotic protein Bcl-2.