Exploration of Benzothiazole Rhodacyanines as Allosteric Inhibitors of Protein–Protein Interactions with Heat Shock Protein 70 (Hsp70)
作者:Hao Shao、Xiaokai Li、Michael A. Moses、Luke A. Gilbert、Chakrapani Kalyanaraman、Zapporah T. Young、Margarita Chernova、Sara N. Journey、Jonathan S. Weissman、Byron Hann、Matthew P. Jacobson、Len Neckers、Jason E. Gestwicki
DOI:10.1021/acs.jmedchem.8b00583
日期:2018.7.26
Cancer cells rely on the chaperone heatshockprotein70 (Hsp70) for survival and proliferation. Recently, benzothiazole rhodacyanines have been shown to bind an allosteric site on Hsp70, interrupting its binding to nucleotide-exchange factors (NEFs) and promoting cell death in breast cancer cell lines. However, proof-of-concept molecules, such as JG-98, have relatively modest potency (EC50 ≈ 0.7–0
Neutral analogs of the heat shock protein 70 (Hsp70) inhibitor, JG-98
作者:Hao Shao、Jason E. Gestwicki
DOI:10.1016/j.bmcl.2020.126954
日期:2020.3
The heatshockprotein70 (Hsp70) family of molecular chaperones are highly expressed in tumors. Inhibitors containing a pyridinium-modified benzothiazole, such as JG-98, bind to a conserved, allosteric site in Hsp70, showing promising anti-proliferative activity in cancer cells. When bound to Hsp70, the charged pyridinium makes favorable contacts; however, this moiety also increases the inhibitor's
The synthesis of a series of thiazolyl and benzothiazolyl hydrazones derived from alpha-(N)-acylpyridines,-quinolines, -isoquinolines, -pyridazines, -pyrimidines, and -pyrazines is reported. The stereochemistry of these compounds was determined by NMR spectroscopic methods. The antiproliferative activity of the novel compounds was quantified in tissue culture (melanoma, breast carcinoma, colon adenocarcinoma, epitheloid cervix carcinoma, Burkitt's lymphoma, leukemia, and hydroxyurea sensitive and resistant myelogenous leukemia sublines). All compounds exhibited profound antiproliferative activity, in particular against Burkitt's lymphoma cells. Out of this series, compounds 6b, 7b, 7c, 8c and 8i were found to be 13-900 times more potent than hydroxyurea and no cross-resistance to hydroxyurea was observed. A predictive 3D-QSAR model using the CoMFA approach was established.
Anthelmintic quaternary salts. III. Benzothiazolium salts
作者:David L. Garmaise、Gerard Y. Paris、Jacqueline Komlossy、C. H. Chambers、R. C. McCrae
DOI:10.1021/jm00301a008
日期:1969.1
107. Reactions of benzthiazole derivatives. Part I. The reactivity of the methylthiol group in quaternary salts of 1-methylthiobenzthiazole