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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2016 ; 16 (2): 571-82 Nephropedia Template TP
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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 #MMPMID27346360
Cell Rep 2016[Jul]; 16 (2): 571-82 PMID27346360show ga
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 developed transgenic mice that ectopically express the fluorescent adaptor protein, ASC (apoptosis-associated speck-like protein containing a caspase recruitment domain), and characterized the formation of assembled inflammasome complexes (?specks?) in primary cells and tissues. In addition to hematopoietic cells, we found that a stromal population in the lung tissues forms specks during the early phase of influenza infection whereas myeloid cells showed speck formation after two days. In a peritonitis and Group B streptococcus infection models, 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.