BCL-XL antagonism selectively reduces neutrophil life span within inflamed tissues without causing neutropenia

Emma M. Carrington, Cynthia Louis, Tobias Kratina, Manuela Hancock, Christine R. Keenan, Nadia Iannarella, Rhys S. Allan, Ahmad Z. Wardak, Peter E. Czabotar, Marco J. Herold, Robyn L. Schenk, Christine A. White, Damian D'Silva, Yuyan Yang, Wesley Wong, Huon Wong, Vanessa L. Bryant, Nicholas D. Huntington, Jai Rautela, Robyn M. SutherlandYifan Zhan, Jacinta Hansen, Duong Nhu, Guillaume Lessene, Ian P. Wicks, Andrew M. Lew

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

Neutrophils help to clear pathogens and cellular debris, but can also cause collateral damage within inflamed tissues. Prolonged neutrophil residency within an inflammatory niche can exacerbate tissue pathology. Using both genetic and pharmacological approaches, we show that BCL-XL is required for the persistence of neutrophils within inflammatory sites in mice. We demonstrate that a selective BCL-XL inhibitor (A-1331852) has therapeutic potential by causing apoptosis in inflammatory human neutrophils ex vivo. Moreover, in murine models of acute and chronic inflammatory disease, it reduced inflammatory neutrophil numbers and ameliorated tissue pathology. In contrast, there was minimal effect on circulating neutrophils. Thus, we show a differential survival requirement in activated neutrophils for BCL-XL and reveal a new therapeutic approach to neutrophil-mediated diseases.

Original languageEnglish
Pages (from-to)2550-2562
Number of pages13
JournalBlood Advances
Volume5
Issue number11
DOIs
Publication statusPublished - 8 Jun 2021

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