Widespread cortical expression of MANF by AAV serotype 7: localization and protection against ischemic brain injury.
Mesencephalic astrocyte-derived neurotrophic factor (MANF) is a secreted protein which reduces endoplasmic reticulum (ER) stress and has neurotrophic effects on dopaminergic neurons. Intracortical delivery of recombinant MANF protein protects tissue from ischemic brain injury in vivo. In this study, we examined the protective effect of adeno-associated virus serotype 7 encoding MANF in a rodent model of stroke. An AAV vector containing human MANF cDNA (AAV-MANF) was constructed and verified for expression of MANF protein. AAV-MANF or an AAV control vector was administered into three sites in the cerebral cortex of adult rats. One week after the vector injections, the right middle cerebral artery (MCA) was ligated for 60min. Behavioral monitoring was conducted using body asymmetry analysis, neurological testing, and locomotor activity. Standard immunohistochemical and western blotting procedures were conducted to study MANF expression. Our data showed that AAV-induced MANF expression is redistributed in neurons and glia in cerebral cortex after ischemia. Pretreatment with AAV-MANF reduced the volume of cerebral infarction and facilitated behavioral recovery in stroke rats. In conclusion, our data suggest that intracortical delivery of AAV-MANF increases MANF protein production and reduces ischemic brain injury. Ischemia also caused redistribution of AAV-mediated MANF protein suggesting an injury-induced release.
Airavaara
Mikko
M
Neural Protection and Regeneration Section, National Institute on Drug Abuse, IRP, NIH, Baltimore, MD 21201, USA.
Chiocco
Matt J
MJ
Howard
Doug B
DB
Zuchowski
Katie L
KL
Peränen
Johan
J
Liu
Chao
C
Fang
Shengyun
S
Hoffer
Barry J
BJ
Wang
Yun
Y
Harvey
Brandon K
BK
D000818:Animals; D002545:Brain Ischemia / Q000235:genetics* / Q000503:physiopathology / Q000628:therapy*; D002478:Cells, Cultured; D000229:Dependovirus / Q000235:genetics* / Q000502:physiology; D004195:Disease Models, Animal; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D020244:Infarction, Middle Cerebral Artery / Q000235:genetics / Q000503:physiopathology / Q000628:therapy; D008297:Male; D009043:Motor Activity / Q000235:genetics; D009414:Nerve Growth Factors / Q000096:biosynthesis / Q000235:genetics* / Q000627:therapeutic use; D011506:Proteins / Q000235:genetics* / Q000627:therapeutic use; D051381:Rats; D017207:Rats, Sprague-Dawley; D020127:Recovery of Function / Q000235:genetics
C546826:MANF protein, rat; D009414:Nerve Growth Factors; D011506:Proteins