SEPS1 gene is activated during astrocyte ischemia and shows prominent antiapoptotic effects.
Contrarily to neurons, astrocytes can survive short periods of ischemia. We have searched for genes implicated in astrocyte resistance to ischemia using oxygen and glucose deprivation (OGD) as a stroke model. A RNA differential display approach uncovered the OGD induction of selenoprotein-S-encoding gene SEPS1. This endoplasmic reticulum (ER) resident protein is known to promote cell survival regulating the ER stress as well as inflammation. We found that suppression of SEPS1 by small interfering RNA severely increases astrocyte injure caused by OGD, suggesting that selenoprotein S protects astrocytes against ischemia. Our data also support that modulation of ER stress is implicated in this effect.
Fradejas
Noelia
N
Pharmacology Unit, Facultad de Medicina, Departamento de Ciencias Médicas and Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain.
Pastor
María Dolores
MD
Mora-Lee
Silvia
S
Tranque
Pedro
P
Calvo
Soledad
S
D000818:Animals; D017209:Apoptosis / Q000235:genetics*; D001253:Astrocytes / Q000378:metabolism*; D002470:Cell Survival / Q000235:genetics; D002478:Cells, Cultured; D019610:Cytoprotection / Q000235:genetics; D015536:Down-Regulation / Q000235:genetics; D004721:Endoplasmic Reticulum / Q000378:metabolism; D005786:Gene Expression Regulation / Q000502:physiology; D020925:Hypoxia-Ischemia, Brain / Q000235:genetics* / Q000378:metabolism*; D008565:Membrane Proteins / Q000235:genetics* / Q000378:metabolism*; D051379:Mice; D018384:Oxidative Stress / Q000502:physiology; D034622:RNA Interference; D012333:RNA, Messenger / Q000378:metabolism; D034741:RNA, Small Interfering; D012643:Selenium / Q000378:metabolism; D051140:Selenoproteins / Q000235:genetics* / Q000378:metabolism*
D008565:Membrane Proteins; D012333:RNA, Messenger; D034741:RNA, Small Interfering; C487710:SELENOS protein, human; D051140:Selenoproteins; C532537:Selenos protein, mouse; D012643:Selenium