Identification of 1,2,3-triazole derivatives that protect pancreatic β cells against endoplasmic reticulum stress-mediated dysfunction and death through the inhibition of C/EBP-homologous protein expression

Hongliang Duan, Daleep Arora, Yu Li, Hendra Setiadi, Depeng Xu, Hui Ying Lim, Weidong Wang

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The C/EBP-homologous protein (CHOP) acts as a mediator of endoplasmic reticulum (ER) stress-induced pancreatic insulin-producing β cell death, a key element in the pathogenesis of diabetes. Chemicals that inhibit the expression of CHOP might therefore protect β cells from ER stress-induced apoptosis and prevent or ameliorate diabetes. Here, we used high-throughput screening to identify a series of 1,2,3-triazole amide derivatives that inhibit ER stress-induced CHOP-luciferase reporter activity. Our SAR studies indicate that compounds with an N,1-diphenyl-5-methyl-1H-1,2,3-triazole-4-carboxamide backbone potently protect β cell against ER stress. Several representative compounds inhibit ER stress-induced up-regulation of CHOP mRNA and protein, without affecting the basal level of CHOP expression. We further show that a 1,2,3-triazole derivative 4e protects β cell function and survival against ER stress in a CHOP-dependent fashion, as it is inactive in CHOP-deficient β cells. Finally, we show that 4e significantly lowers blood glucose levels and increases concomitant β cell survival and number in a streptozotocin-induced diabetic mouse model. Identification of small molecule inhibitors of CHOP expression that prevent ER stress-induced β cell dysfunction and death may provide a new modality for the treatment of diabetes.

Original languageEnglish
Pages (from-to)2621-2630
Number of pages10
JournalBioorganic and Medicinal Chemistry
Volume24
Issue number12
DOIs
Publication statusPublished - 15 Jun 2016
Externally publishedYes

Keywords

  • Anti-diabetic drug
  • Beta cell death
  • Beta cell survival
  • CHOP
  • Diabetes
  • ER stress

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