Discovery of 5-aryl-3-thiophen-2-yl-1H-pyrazoles as a new class of Hsp90 inhibitors in hepatocellular carcinoma
摘要:
Although hepatocellular carcinoma (HCC)-related mortality has increased over the past decades, treatment options are still very limited, underlining the need for developing new therapeutic strategies. The molecular chaperone heat shock protein 90 (Hsp90) plays a key role in post-translational maturation of many oncogenic client proteins that are important for survival and proliferation of cancer cells. Thus, inhibitors of Hsp90 are promising targets for many cancer types. In this study, 15 diarylpyrazole compounds were screened against MCF7 and HepG2 cell lines. Compound 8, which contained a thiophene group, demonstrated the highest antiproliferative activity against HepG2 cells having an IC50, of 0.083 mu M. Four additional diarylpyrazoles, each containing a thiophene group, were prepared and screened for antiproliferative activity. None of these four compounds exhibited superior activity to compound 8 on HepG2 cells. Therefore, compound 8 was selected for further in vitro assays. Cell cycle arrest was observed at the G2 phase in compound 8-treated cells. Compound 8 also caused a 7.7-fold increase in caspase-3. These results confirm the apoptotic effect of compound 8 on HepG2 cells. Moreover, compound 8 inhibited Hsp90 (IC50, = 2.67 +/- 0.18 mu M) in an in vitro assay and caused a 70.8% reduction in Hsp90 levels in a HepG2 cell-based assay. Additionally, compound 8 caused significant reduction in the levels of Hsp90 client proteins (Akt, c-Met, c-Raf, and EGFR) and a 1.57-fold increase in Hsp70. Molecular docking studies were also performed to predict the binding mode of compound 8 and followed by molecular dynamics simulations to give further insights into the binding mode of 8.
NEW DRUG FOR INHIBITING AGGREGATION OF PROTEINS INVOLVED IN DISEASES LINKED TO PROTEIN AGGREGATION AND/OR NEURODEGENERATIVE DISEASES
申请人:Giese Armin
公开号:US20110293520A1
公开(公告)日:2011-12-01
The present invention relates to a compound represented by formula (E). The present invention also relates to a compound represented by the formula (E) for use in the treatment or prevention of diseases linked to protein aggregation and/or neurodegenerative diseases. Moreover, the present invention relates to pharmaceutical and diagnostic compositions comprising the compound of the invention as well as to a kit. Furthermore, the present invention relates to a method of imaging deposits of aggregated protein. A kit for preparing a detectably labelled compound of the present invention is also disclosed. Formula (E) wherein X, Y and L are independently nondirectionally selected from —C(R
1
)(R
2
)—, —C(R
3
)═, —N(R
4
)—, —N═, —N
+
(R
5
)═, —O— and —S—; M and Z are independently nondirectionally selected from formula (I) and formula (II).
DRUG FOR INHIBITING AGGREGATION OF PROTEINS INVOLVED IN DISEASES LINKED TO PROTEIN AGGREGATION AND/OR NEURODEGENERATIVE DISEASES
申请人:Ludwig-Maximilians-Universität München
公开号:US20160185730A1
公开(公告)日:2016-06-30
The present invention relates to a compound represented by formula (E). The present invention also relates to a compound represented by the formula (E) for use in the treatment or prevention of diseases linked to protein aggregation and/or neurodegenerative diseases. Moreover, the present invention relates to pharmaceutical and diagnostic compositions comprising the compound of the invention as well as to a kit. Furthermore, the present invention relates to a method of imaging deposits of aggregated protein. A kit for preparing a detectably labelled compound of the present invention is also disclosed.
Drugs for inhibiting aggregation of proteins invoved in diseases linked to protein aggregation and/or neurodegenerative diseases
申请人:Ludwig-Maximilians-Universität München
公开号:EP2687513A1
公开(公告)日:2014-01-22
The present invention relates to a compound represented by formula (E). The present invention also relates to a compound represented by the formula (E) for use in the treatment or prevention of diseases linked to protein aggregation and/or neurodegenerative diseases. Moreover, the present invention relates to pharmaceutical and diagnostic compositions comprising the compound of the invention as well as to a kit. Furthermore, the present invention relates to a method of imaging deposits of aggregated protein. A kit for preparing a detectably labelled compound of the present invention is also disclosed.
DRUGS FOR INHIBITING AGGREGATION OF PROTEINS INVOLVED IN DISEASES LINKED TO PROTEIN AGGREGATION AND/OR NEURODEGENERATIVE DISEASES
申请人:Ludwig-Maximilians-Universität München
公开号:EP2684873A1
公开(公告)日:2014-01-15
The present invention relates to a compound represented by formula (E). The present invention also relates to a compound represented by the formula (E) for use in the treatment or prevention of diseases linked to protein aggregation and/or neurodegenerative diseases. Moreover, the present invention relates to pharmaceutical and diagnostic compositions comprising the compound of the invention as well as to a kit. Furthermore, the present invention relates to a method of imaging deposits of aggregated protein. A kit for preparing a detectably labelled compound of the present invention is also disclosed.