Differential roles of caspase-1 and caspase-11 in infection and inflammation.

Abstract:

:Caspase-1, also known as interleukin-1β (IL-1β)-converting enzyme (ICE), regulates antimicrobial host defense, tissue repair, tumorigenesis, metabolism and membrane biogenesis. On activation within an inflammasome complex, caspase-1 induces pyroptosis and converts pro-IL-1β and pro-IL-18 into their biologically active forms. "ICE-/-" or "Casp1-/-" mice generated using 129 embryonic stem cells carry a 129-associated inactivating passenger mutation on the caspase-11 locus, essentially making them deficient in both caspase-1 and caspase-11. The overlapping and unique functions of caspase-1 and caspase-11 are difficult to unravel without additional genetic tools. Here, we generated caspase-1-deficient mouse (Casp1Null) on the C57BL/6 J background that expressed caspase-11. Casp1Null cells did not release IL-1β and IL-18 in response to NLRC4 activators Salmonella Typhimurium and flagellin, canonical or non-canonical NLRP3 activators LPS and ATP, Escherichia coli, Citrobacter rodentium and transfection of LPS, AIM2 activators Francisella novicida, mouse cytomegalovirus and DNA, and the infectious agents Listeria monocytogenes and Aspergillus fumigatus. We further demonstrated that caspase-1 and caspase-11 differentially contributed to the host defense against A. fumigatus infection and to endotoxemia.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Man SM,Karki R,Briard B,Burton A,Gingras S,Pelletier S,Kanneganti TD

doi

10.1038/srep45126

subject

Has Abstract

pub_date

2017-03-27 00:00:00

pages

45126

issn

2045-2322

pii

srep45126

journal_volume

7

pub_type

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