Abstract
Four known (1, 2, 3, and 6) and three new compounds including a 1,4-diacetyl-2,5-dibenzylpiperazine derivative
(4), a quinazolinone-containing indole derivative (5), and a new ester of 2,4-dihydroxy-6-methylbenzoic acid (7) were isolated from the fungus Neosartorya pseudofischeri S. W. Peterson. Compound 2 displayed in vitro growth inhibitory activity that ranged between the activities of etoposide and carboplatin,
chosen as reference compounds, in six distinct cancer cell lines. Compound 1 displayed less activity than 2. Computer-assisted phase-contrast microscopy-related analysis revealed that 2 displayed cytostatic, not cytotoxic, effects in human U373 glioblastoma and A549
non-small cell lung cancer apoptosis-resistant cells with marked inhibition of mitotic
rates. Cancer cells in the remaining phases of the cell cycle were unchanged. Flow
cytometry analysis further confirmed that 2 does not induce apoptotic features in U373 or A549 cancer cells. Thus, 2 represents a novel chemical scaffold from which derivatives for anticancer cytostatic
compounds can be derived.
Key words
Neosartorya pseudofischeri S. W. Peterson - Trichocomaceae - brasiliamide derivatives - pseudofischerine - pyripyropene
A - cytostatic activity