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Detection of Inflammasome Activation and Pyroptotic Cell Death in Murine Bone Marrow-derived Macrophages
Published on: May 21, 2018
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TIMP2 facilitates CIRI through activating NLRP3-mediated pyroptosis
Shaoyong Shi1, Chongyang Zhang1, Jiaxiang Liu1
1Department of Prehospital Emergency Care, Qinhuangdao First Hospital, Qinhuangdao 066000, China.
Aging
|May 13, 2023
Summary
Tissue inhibitor of metalloproteinase 2 (TIMP2) exacerbates cerebral ischemia-reperfusion injury (CIRI) by activating NLRP3-mediated pyroptosis. This finding offers new insights into CIRI mechanisms and potential therapeutic targets.
Area of Science:
- Neuroscience
- Pathology
- Molecular Biology
Background:
- Cerebral ischemia-reperfusion injury (CIRI) is a critical condition with complex underlying mechanisms.
- Understanding the molecular pathways involved in CIRI is essential for developing effective treatments.
Purpose of the Study:
- To investigate the role of TIMP2 in the pathogenesis of CIRI.
- To elucidate the involvement of NLRP3-mediated pyroptosis in CIRI.
Main Methods:
- Cerebral ischemia-reperfusion (CIR) and hypoxia/reoxygenation (H/R) models in mice and cells.
- Assessment of brain tissue damage, water content, and neuronal apoptosis.
- Analysis of protein expression levels using qPCR and Western blotting.
Main Results:
- TIMP2 aggravated pathological damage and increased brain water content and apoptosis in CIRI models.
- TIMP2 significantly upregulated the expression of pyroptosis-related proteins (NLRP3, IL-1β, IL-18, GSDMD, Caspase-1, ASC) and p-ERK1/2.
- TIMP2 knockdown (KD) reduced these effects, indicating a protective role.
Conclusions:
- TIMP2 plays a crucial role in promoting CIRI.
- TIMP2 activates NLRP3-mediated pyroptosis, contributing to the progression of brain injury.
- Targeting TIMP2 may represent a novel therapeutic strategy for CIRI.
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