Inhibition of Hepatitis C replication by targeting the molecular chaperone Hsp90 - synthesis and biological evaluation of 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole derivatives

Katja-Emilia M Lillsunde, Tihomir Tomašič, Philipp Schult, Volker Lohmann, Danijel Kikelj, Päivi Tammela

Research output: Contribution to journalArticleScientificpeer-review


Cellular chaperones that belong to the heat-shock protein 90 (Hsp90) family are a prerequisite for successful viral propagation for most viruses. The hepatitis C virus (HCV) uses Hsp90 for maturation, folding, and modification of viral proteins. Based on our previous discovery that marine alkaloid analogues with a 4,5,6,7-tetrahydrobenzo[1,2-d]thiazole-2-amine structure show inhibition of HCV replication and binding to Hsp90, a series of twelve novel compounds based on this scaffold was designed and synthesized. The aim was improved Hsp90 affinity and anti-HCV activity. Through structural optimization, improved binding to Hsp90 and specific HCV inhibition in genotype 1b and 2a replicon models was achieved for three compounds belonging to the newly synthesized series. Furthermore, these compounds efficiently inhibited replication of full-length HCV genotype 2a in a reporter virus RNA assay with IC50 values ranging from 0.03 to 0.6 mu m.

Original languageEnglish
JournalChemMedChem : chemistry enabling drug discovery.
Issue number3
Pages (from-to)334-342
Number of pages9
Publication statusPublished - 5 Feb 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • Hsp90
  • hepatitis C virus
  • inhibitors
  • replicon model
  • 116 Chemical sciences
  • 317 Pharmacy

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