NDLI: Matrix Metalloproteinase-8 is a Novel Pathogenetic Factor in Focal Cerebral Ischemia

Content Provider	Springer Nature Link
Author	Han, Jeong Eun Lee, Eun Jung Moon, Eunjung Ryu, Jong Hoon Choi, Ji Woong Kim, Hee Sun
Copyright Year	2014
Abstract	The neutrophil collagenase matrix metalloproteinase-8 (MMP8) is a recently identified member of MMPs that have important roles in various inflammation-related disorders. Previously, we identified MMP8 as a new neuroinflammatory mediator in activated microglia by regulating TNF-α productivity. Here, we present evidence that MMP8 is a critical factor for brain damage in transient focal cerebral ischemia by modulating neuroinflammation likely microglial activation and TNF-α production. Biochemical analyses showed upregulation of MMP8 expression at mRNA and protein levels in transient middle cerebral artery occlusion/reperfusion (M/R)-challenged brains. Furthermore, double immunolabeling showed that MMP8 expression was upregulated in the activated microglia of M/R-challenged brains. Assessment of infarct volume, neurological score, and survival/death of neural cells revealed that administration of an MMP8 inhibitor (M8I) immediately after reperfusion reduced brain damage. Histological analyses showed that microglial activation and TNF-α expression in ischemic conditions was abrogated by exposure to M8I, as demonstrated in our previous study using cultured microglia. These outcomes from a pharmacological approach were reaffirmed by a genetic approach using a lentiviral system. Intracerebroventricular microinjection of MMP8-specific shRNA lentivirus reduced the extent of ischemia-induced brain damage, as assessed by infarct volume, neurological score, microglial activation, and TNF-α expression. These results suggest a novel pathogenetic role of MMP8 and implicate modulation of its activity as a tractable strategy for therapies against cerebral ischemia.
Starting Page	231
Ending Page	239
Page Count	9
File Format	PDF
ISSN	08937648
Journal	Molecular Neurobiology
Volume Number	53
Issue Number	1
e-ISSN	15591182
Language	English
Publisher	Springer US
Publisher Date	2014-11-26
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	MMP8 MMP8 inhibitor MMP8 shRNA Microglia TNF-α Middle cerebral artery occlusion/reperfusion Neurosciences Neurobiology Cell Biology Neurology
Content Type	Text
Resource Type	Article
Subject	Neurology Cellular and Molecular Neuroscience

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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