Exploration and optimisation of structure-activity relationships of new triazole-based C-terminal Hsp90 inhibitors towards in vivo anticancer potency

Dernovšek, Jaka (avtor), Zajec, Živa (avtor), Urbančič, Dunja (avtor), Mlinarič-Raščan, Irena (avtor), Cotman, Andrej Emanuel (avtor), Zidar, Nace (avtor), Tomašič, Tihomir (avtor)

The development of new anticancer agents is one of the most urgent topics in drug discovery. Inhibition of molecular chaperone Hsp90 stands out as an approach that affects various oncogenic proteins in different types of cancer. These proteins rely on Hsp90 to obtain their functional structure, and thus Hsp90 is indirectly involved in the pathophysiology of cancer. However, the most studied ATP-competitive inhibition of Hsp90 at the N-terminal domain has proven to be largely unsuccessful clinically. Therefore, research has shifted towards Hsp90 C-terminal domain (CTD) inhibitors, which are also the focus of this study. Our recent discovery of compound C has provided us with a starting point for exploring the structure-activity relationship and optimising this new class of triazole-based Hsp90 inhibitors. This investigation has ultimately led to a library of 33 analogues of C that have suitable physicochemical properties and several inhibit the growth of different cancer types in the low micromolar range. Inhibition of Hsp90 was confirmed by biophysical and cellular assays and the binding epitopes of selected inhibitors were studied by STD NMR. Furthermore, the most promising Hsp90 CTD inhibitor 5x was shown to induce apoptosis in breast cancer (MCF-7) and Ewing sarcoma (SK-N-MC) cells while inducing cause cell cycle arrest in MCF-7 cells. In MCF-7 cells, it caused a decrease in the levels of ERα and IGF1R, known Hsp90 client proteins. Finally, 5x was tested in zebrafish larvae xenografted with SK-N-MC tumour cells, where it limited tumour growth with no obvious adverse effects on normal zebrafish development.

• Jezik: Angleški jezik
• Ključne besede: cancer, Hsp90, inhibitor, Ewing sarcoma, zebrafish
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FFA - Fakulteta za farmacijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 29 str.
• Številčenje: Vol. 177, art. 116941
• PID: 20.500.12556/RUL-161038-5a6e6059-64bc-c199-7a04-cca63cc5f0ff
• UDK: 615.4:54:616-006
• ISSN pri članku: 0753-3322
• DOI: 10.1016/j.biopha.2024.116941
• COBISS.SI-ID: 199197699
• Datum objave v RUL: 06.09.2024

DERNOVŠEK, Jaka, ZAJEC, Živa, URBANČIČ, Dunja, MLINARIČ-RAŠČAN, Irena, COTMAN, Andrej Emanuel, ZIDAR, Nace in TOMAŠIČ, Tihomir, 2024, Exploration and optimisation of structure-activity relationships of new triazole-based C-terminal Hsp90 inhibitors towards in vivo anticancer potency. Biomedicine & pharmacotherapy [na spletu]. 2024. Vol. 177, no. 116941. [Dostopano 4 april 2025]. DOI 10.1016/j.biopha.2024.116941. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=161038

Gradivo je del revije

• Naslov: Biomedicine & pharmacotherapy
• Skrajšan naslov: Biomed. pharmacother.
• Založnik: Masson
• ISSN: 0753-3322
• COBISS.SI-ID: 25098240

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: Hsp90, inhibitorji, Ewingov sarkom, cebrica, rak, medicina, farmacevtska kemija