A number of phenothiazine-, phenoxazine- and related tricyclics-derived chloroacetamides were synthesized and evaluated in vitro for antiprotozoal activities against Leishmania major (L. major) promastigotes. Several analogs were remarkably potent inhibitors, with antileishmanial activities being comparable or superior to those of the reference antiprotozoal drugs. Furthermore, we explored the structure activity relationships of N-10 haloacetamides that influence the potency of such analogs toward inhibition of L major promastigote growth in vitro. With respect to the mechanism of action, selected compounds were evaluated for time -dependent inactivation of Trypanosoma brucei trypanothione reductase. Our results are indicative of a covalent interaction which could account for potent antiprotozoal activities. (C) 2015 Elsevier Masson SAS. All rights reserved.
Parthenolide Covalently Targets and Inhibits Focal Adhesion Kinase in Breast Cancer Cells
作者:Charles A. Berdan、Raymond Ho、Haley S. Lehtola、Milton To、Xirui Hu、Tucker R. Huffman、Yana Petri、Chad R. Altobelli、Sasha G. Demeulenaere、James A. Olzmann、Thomas J. Maimone、Daniel K. Nomura
DOI:10.1016/j.chembiol.2019.03.016
日期:2019.7
parthenolide in human breast cancer cells. We find that parthenolide, as well as other related exocyclic methylene lactone-containing sesquiterpenes, covalently modify cysteine 427 of focal adhesion kinase 1 (FAK1), leading to impairment of FAK1-dependent signaling pathways and breast cancer cell proliferation, survival, and motility. These studies reveal a functional target exploited by members of a