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Int. J. Mol. Sci. 2014, 15(9), 15806-15820; doi:10.3390/ijms150915806

NLRP3 Inflammasome Sequential Changes in Staphylococcus aureus-Induced Mouse Model of Acute Rhinosinusitis

1
Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
2
Institute of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 17 April 2014 / Revised: 31 July 2014 / Accepted: 18 August 2014 / Published: 9 September 2014
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

The NLR pyrin domain containing 3 (NLRP3) inflammasome plays a crucial role in lung disease and may have a similar role in upper respiratory tract inflammation. We therefore constructed a C57BL/6 mouse model of acute rhinosinusitis induced by Staphylococcus aureus and investigated the role of the NLRP3 inflammasome in this model. Mice were classified as non-inoculated group (group A) and inoculated groups (groups B, C, D and E, sacrificed 1, 3, 7 and 14 days after inoculation, respectively). Hematoxylin-eosin staining showed that each group had inflammatory cell infiltration, except group A. The damage of the nasal mucosa was aggravated gradually over time. Western blot and immunofluorescence showed that the structural proteins of the NLRP3 inflammasome (NLRP3, ASC (apoptosis-associated speck-like protein containing CARD), procaspase-1) in groups B, C, D and E were increased gradually. But they were reduced in group B compared with group A, except for NLRP3. Western blot showed that the cleavage fragment of procaspase-1, p20 in groups B, C, D and E was increased gradually. Real-time PCR showed that the corresponding mRNAs of the structural proteins were changed the same as their proteins. IL-1β mRNA and mature IL-1β protein were increased gradually in groups A, B, C, D and E. These results indicate that NLRP3 inflammasome activation was associated with the acute rhinosinusitis, and that there was a positive correlation between the expression level of the NLRP3 inflammasome and the severity of acute rhinosinusitis. View Full-Text
Keywords: NLRP3 inflammasome; acute rhinosinusitis; inflammation NLRP3 inflammasome; acute rhinosinusitis; inflammation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wang, Y.-J.; Gong, G.-Q.; Chen, S.; Xiong, L.-Y.; Zhou, X.-X.; Huang, X.; Kong, W.-J. NLRP3 Inflammasome Sequential Changes in Staphylococcus aureus-Induced Mouse Model of Acute Rhinosinusitis. Int. J. Mol. Sci. 2014, 15, 15806-15820.

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