Expression of myelencephalon-specific protease in transient middle cerebral artery occlusion model of rat brain.
Myelencephalon-specific protease (MSP) is one of the serine proteases and is expressed in the central nervous system of rats. Its function and alternation in brain injury have not yet been clarified. In this study, we investigated the expression of MSP after transient middle cerebral artery occlusion (MCAO) using in situ hybridization and immunohistochemistry. In situ localization of MSP mRNA demonstrated a higher level in the corpus callosum and around the ischemic area from 12 h to 14 days after MCA reperfusion, with the peak of expression coming 3 days after reperfusion in both regions. Immunohistochemically, the expression of protein was found 1 day after reperfusion in the same brain region that was observed for mRNA. The peak was 7 days after reperfusion in both regions. Micro-autoradiography, immunostaining and double immunohistochemical labeling revealed the expression of MSP to be located mainly in the oligodendrocytes. The present results indicate that MSP may be related to the turnover of the myelin-associated proteins and the extracellular matrix proteins after transient MCAO. The activation of MSP may play a role in remodeling processes such as neurite outgrowth and remyelination.
Uchida
Atsushi
A
Department of Neurosurgery and Restorative Neuroscience, Nagoya City University Graduate School of Medical Sciences, Mizuho, Nagoya 467-8601, Japan.
Oka
Yuichi
Y
Aoyama
Mineyoshi
M
Suzuki
Shugo
S
Yokoi
Takashi
T
Katano
Hiroyuki
H
Mase
Mitsuhito
M
Tada
Toyohiro
T
Asai
Kiyofumi
K
Yamada
Kazuo
K
D015087:2',3'-Cyclic-Nucleotide Phosphodiesterases / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000378:metabolism*; D002452:Cell Count; D004195:Disease Models, Animal; D005786:Gene Expression Regulation; D007150:Immunohistochemistry / Q000379:methods; D017403:In Situ Hybridization / Q000379:methods; D020244:Infarction, Middle Cerebral Artery / Q000378:metabolism*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012697:Serine Endopeptidases / Q000235:genetics / Q000378:metabolism*; D013997:Time Factors
D015087:2',3'-Cyclic-Nucleotide Phosphodiesterases; D012697:Serine Endopeptidases; C108816:myelencephalon-specific serine protease