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A Fluorescent Reporter Mouse for Inflammasome Assembly Demonstrates an Important Role for Cell-Bound and Free ASC Specks during In Vivo Infection.

Abstract：

:Inflammasome activation is associated with numerous diseases. However, in vivo detection of the activated inflammasome complex has been limited by a dearth of tools. We have developed transgenic mice that ectopically express the fluorescent adaptor protein, apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) and characterized the formation of assembled inflammasome complexes ("specks") in primary cells and tissues. In addition to hematopoietic cells, we have found that a stromal population in the lung tissues formed specks during the early phase of influenza infection, whereas myeloid cells showed speck formation after 2 days. In a peritonitis and group B streptococcus infection model, a higher percentage of neutrophils formed specks at early phases of infection, while dendritic cells formed specks at later time points. Furthermore, speck-forming cells underwent pyroptosis and extensive release of specks to the extracellular milieu in vivo. These data underscore the importance of free specks during inflammatory processes in vivo.

journal_name

Cell Rep

journal_title

Cell reports

authors

Tzeng TC,Schattgen S,Monks B,Wang D,Cerny A,Latz E,Fitzgerald K,Golenbock DT

doi

10.1016/j.celrep.2016.06.011

subject

Has Abstract

pub_date

2016-07-12 00:00:00

pages

571-582

issue

2

issn

2211-1247

pii

S2211-1247(16)30730-6

journal_volume

16

pub_type

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