Geldanamycin compounds having a structure according to formula I
where Q
1
, L, L
1
, R
5
, R
6
, and R
11
are as defined herein, are useful for treating a disease or disorder ameliorated by inhibiting the function of extracellular heat shock protein-90.
Inhibition of the oncogene product p185erbB-2 in vitro and in vivo by geldanamycin and dihydrogeldanamycin derivatives
作者:R. C. Schnur、M. L. Corman、R. J. Gallaschun、B. A. Cooper、M. F. Dee、J. L. Doty、M. L. Muzzi、J. D. Moyer、C. I. DiOrio
DOI:10.1021/jm00019a010
日期:1995.9
The erbB-2 oncogene encodes a transmembrane protein tyrosine kinase which plays a pivotal role in signal transduction and has been implicated when overexpressed in breast, ovarian, and gastric cancers. Naturally occurring benzoquinoid ansamycin antibiotics herbimycin A, geldanamycin (GDM), and dihydrogeldanamycin were found to potently deplete p185, the erbB-2 oncoprotein, in human breast cancer SKBR-3 cells in culture. Chemistry efforts to modify selectively the quinoid moiety of GDM afforded derivatives with greater potency in vitro and in vivo. Analogs demonstrated inhibition of p185 phosphotyrosine in cell culture and in vivo after systemic drug administration to nu/nu nude mice bearing Fisher rat embryo cells transfected with human erbB-2 (FRE/erbB-2). Specifically, dosed intraperitoneally at 100 mg/kg, 17-(allylamino)-17-demethoxygeldanamycin and other 17-amino analogs were effective at reducing p185 phosphotyrosine in subcutaneous flank FRE/erbB-2 tumors. Modifications to the 17-19-positions of the quinone ring revealed a broad structure-activity relationship in vitro.
US7259156B2
申请人:——
公开号:US7259156B2
公开(公告)日:2007-08-21
US7378407B2
申请人:——
公开号:US7378407B2
公开(公告)日:2008-05-27
Anticancer activity and toxicity of new quaternary ammonium geldanamycin derivative salts and their mixtures with potentiators
neutral/acidic/basic substituents (1–7) and by quinuclidine motif (8), transformed into ammoniumsalts (9–13) at C(17). These compounds have been characterised by spectroscopic and x-ray methods. Derivative 8 shows better potency than GDM in MCF-7, MDA-MB-231, A549 and HeLa (IC50s = 0.09–1.06 µM). Transformation of 8 into salts 9–13 reduces toxicity (by 11-fold) at attractive potency, e.g. MCF-7 cell line (IC50∼2 µM)