Protection of adult mouse progenitor cells and human glioma cells by de novo decorin expression in an oxygen- and glucose-deprived cell culture model system.
We employed an in vitro hypoxia cell culture model system and gene transfer technology to examine the effect of the decorin gene on cell survival against oxygen and glucose deprivation (OGD). Ectopic expression of decorin in subventricular zone (SVZ) cells from adult male mouse brain and human glioblastoma U-87 cells kept the cells viable against 24 h of OGD. Fewer than 1% of decorin-synthesizing cells were apoptotic after 12 h of OGD. In contrast, 100% of the control cells were apoptotic even after 4 h of OGD. De novo decorin synthesis in SVZ and U-87 cells induced expression of p21, p27 and Ras, AKT (acutely transforming retrovirus AKT8 in rodent T-cell lymphoma), and phosphorylated AKT. Blocking of phosphoinositide 3-kinase (PI-3K), Ras, and the epidermal growth factor receptor with specific inhibitors had no effect on induction of Ras, p21, and p27 at the messenger RNA level in decorin-synthesizing SVZ and U-87 cells. PI-3K inhibitors significantly increased apoptosis in decorin-expressing cells. Our data indicate that induction of p21, p27, Ras, AKT, and phosphorylated AKT by decorin inhibits apoptosis and protects U-87 and SVZ cells against OGD. Therefore, our data suggest that decorin is a potent trophic factor that protects neuronal progenitor cells and glioma cells from OGD.
Santra
Manoranjan
M
Neurology Research, Department of Neurology, Henry Ford Health Sciences Center, Detroit, Michigan 48202, USA.
Katakowski
Mark
M
Zhang
Rui Lan
RL
Zhang
Zheng Gang
ZG
Meng
He
H
Jiang
Feng
F
Chopp
Michael
M
D000375:Aging / Q000502:physiology*; D000818:Animals; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism; D058575:Decorin; D066246:ErbB Receptors / Q000037:antagonists & inhibitors / Q000378:metabolism; D016326:Extracellular Matrix Proteins / Q000235:genetics / Q000378:metabolism*; D051231:Farnesyltranstransferase / Q000037:antagonists & inhibitors / Q000378:metabolism; D005910:Glioma / Q000378:metabolism* / Q000473:pathology*; D005947:Glucose / Q000172:deficiency* / Q000494:pharmacology; D006801:Humans; D051379:Mice; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism* / Q000494:pharmacology; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D000081082:Phosphoinositide-3 Kinase Inhibitors; D010766:Phosphorylation; D011509:Proteoglycans / Q000235:genetics / Q000378:metabolism*; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D013234:Stem Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D015854:Up-Regulation / Q000187:drug effects; D018631:ras Proteins / Q000378:metabolism
D050759:Cyclin-Dependent Kinase Inhibitor p21; D050760:Cyclin-Dependent Kinase Inhibitor p27; D058575:Decorin; D066246:ErbB Receptors; D016326:Extracellular Matrix Proteins; D051231:Farnesyltranstransferase; D005947:Glucose; D010100:Oxygen; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D011509:Proteoglycans; D051057:Proto-Oncogene Proteins c-akt; D018631:ras Proteins; C546878:DCN protein, human; C546879:Dcn protein, mouse