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Antagonism of c-IAP and XIAP proteins is required for efficient induction of cell death by small-molecule IAP antagonists.

Abstract：

:The inhibitor of apoptosis (IAP) proteins are critical regulators of cancer cell survival, which makes them attractive targets for therapeutic intervention in cancers. Herein, we describe the structure-based design of IAP antagonists with high affinities and selectivity (>2000-fold) for c-IAP1 over XIAP and their functional characterization as activators of apoptosis in tumor cells. Although capable of inducing cell death and preventing clonogenic survival, c-IAP-selective antagonists are significantly less potent in promoting apoptosis when compared to pan-selective compounds. However, both pan-IAP- and c-IAP-selective antagonists stimulate c-IAP1 and c-IAP2 degradation and activation of NF-kappaB pathways with comparable potencies. Therefore, although compounds that specifically target c-IAP1 and c-IAP2 are capable of inducing apoptosis, antagonism of the c-IAP proteins and XIAP is required for efficient induction of cancer cell death by IAP antagonists.

journal_name

ACS Chem Biol

journal_title

ACS chemical biology

authors

Ndubaku C,Varfolomeev E,Wang L,Zobel K,Lau K,Elliott LO,Maurer B,Fedorova AV,Dynek JN,Koehler M,Hymowitz SG,Tsui V,Deshayes K,Fairbrother WJ,Flygare JA,Vucic D

doi

10.1021/cb900083m

subject

Has Abstract

pub_date

2009-07-17 00:00:00

pages

557-66

issue

7

eissn

1554-8929

issn

1554-8937

journal_volume

4

pub_type

杂志文章

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