Discovery of Sulfonamidebenzamides as Selective Apoptotic CHOP Pathway Activators of the Unfolded Protein Response.

Abstract:

:Cellular proteins that fail to fold properly result in inactive or disfunctional proteins that can have toxic functions. The unfolded protein response (UPR) is a two-tiered cellular mechanism initiated by eukaryotic cells that have accumulated misfolded proteins within the endoplasmic reticulum (ER). An adaptive pathway facilitates the clearance of the undesired proteins; however, if overwhelmed, cells trigger apoptosis by upregulating transcription factors such as C/EBP-homologous protein (CHOP). A high throughput screen was performed directed at identifying compounds that selectively upregulate the apoptotic CHOP pathway while avoiding adaptive signaling cascades, resulting in a sulfonamidebenzamide chemotype that was optimized. These efforts produced a potent and selective CHOP inducer (AC50 = 0.8 μM; XBP1 > 80 μM), which was efficacious in both mouse embryonic fibroblast cells and a human oral squamous cell cancer cell line, and demonstrated antiproliferative effects for multiple cancer cell lines in the NCI-60 panel.

journal_name

ACS Med Chem Lett

authors

Flaherty DP,Miller JR,Garshott DM,Hedrick M,Gosalia P,Li Y,Milewski M,Sugarman E,Vasile S,Salaniwal S,Su Y,Smith LH,Chung TD,Pinkerton AB,Aubé J,Callaghan MU,Golden JE,Fribley AM,Kaufman RJ

doi

10.1021/ml5003234

subject

Has Abstract

pub_date

2014-10-29 00:00:00

pages

1278-1283

issue

12

issn

1948-5875

journal_volume

5

pub_type

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