title: SEPS1 gene is activated during astrocyte ischemia and shows prominent antiapoptotic effects.
abstract: 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.
authors.affiliation: Pharmacology Unit, Facultad de Medicina, Departamento de Ciencias Médicas and Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain.
authors.forename: Noelia
authors.initials: N
authors.lastname: Fradejas
authors.forename: María Dolores
authors.initials: MD
authors.lastname: Pastor
authors.forename: Silvia
authors.initials: S
authors.lastname: Mora-Lee
authors.forename: Pedro
authors.initials: P
authors.lastname: Tranque
authors.forename: Soledad
authors.initials: S
authors.lastname: Calvo
mesh_terms: 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*
chemical_list: D008565:Membrane Proteins; D012333:RNA, Messenger; D034741:RNA, Small Interfering; C487710:SELENOS protein, human; D051140:Selenoproteins; C532537:Selenos protein, mouse; D012643:Selenium