title: Erythropoietin attenuates oxidative stress and apoptosis in Schwann cells isolated from streptozotocin-induced diabetic rats.
abstract: OBJECTIVE
  High glucose-evoked oxidative stress and apoptosis within Schwann cells (SCs) are mechanisms facilitating the procession of diabetic peripheral neuropathy (DPN). Although erythropoietin (EPO) was demonstrated to have neuroprotective effects in neurodegenerative diseases, the effects of EPO on glucose-evoked oxidative stress and apoptosis of SCs remain unknown.
  
  
  METHODS
  Primary cultured SCs isolated from streptozotocin (STZ)-induced diabetic peripheral neuropathic rats and normal control rats were exposed to high or normal glucose condition with or without EPO incubation for 72 h. Cell viability, apoptotic rate, cellular reactive oxygen species (ROS) level, total glutathione (GSH) level, EPO mRNA and erythropoietin receptor (EPOR) mRNA levels were assayed.
  
  
  RESULTS
  SCs from diabetic rats showed a lower cell viability and a higher apoptotic rate. High glucose culture condition elevated ROS level and diminished total GSH level of SCs. EPO improved cell viability and decreased cell apoptotic rate of SCs. EPO also elevated total GSH level and decreased intracellular ROS level. SCs from diabetic rats exhibited higher EPO mRNA and EPOR mRNA levels than SCs from normal control rats.
  
  
  CONCLUSIONS
  The data of this study offered fresh viewpoints for interpreting the pathogenesis of DPN and novel pharmacological principles implicit in the therapeutic effect of EPO.
authors.affiliation: Department of Anatomy, Shandong University School of Medicine, Shandong, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Yu
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Yanwen
authors.initials: Y
authors.lastname: Bi
authors.forename: Zhen
authors.initials: Z
authors.lastname: Liu
authors.forename: Huaxiang
authors.initials: H
authors.lastname: Liu
authors.forename: Zhenzhong
authors.initials: Z
authors.lastname: Li
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D002470:Cell Survival / Q000187:drug effects; D003921:Diabetes Mellitus, Experimental / Q000139:chemically induced* / Q000188:drug therapy* / Q000378:metabolism; D003929:Diabetic Neuropathies / Q000188:drug therapy / Q000378:metabolism; D004921:Erythropoietin / Q000494:pharmacology*; D005947:Glucose / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects*; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000378:metabolism; D017467:Receptors, Erythropoietin / Q000378:metabolism; D012583:Schwann Cells / Q000187:drug effects* / Q000378:metabolism; D013311:Streptozocin / Q000494:pharmacology*
chemical_list: D012333:RNA, Messenger; D017382:Reactive Oxygen Species; D017467:Receptors, Erythropoietin; D004921:Erythropoietin; D013311:Streptozocin; D005978:Glutathione; D005947:Glucose
keywords: Schwann cell; apoptosis; diabetic neuropathy; erythropoietin; oxidative stress