title: Mesencephalic astrocyte-derived neurotrophic factor inhibits oxygen-glucose deprivation-induced cell damage and inflammation by suppressing endoplasmic reticulum stress in rat primary astrocytes.
abstract: Astrocyte inflammation plays important roles both in physiological and pathological processes in the central nervous system (CNS). Ischemic injury in the CNS causes damage to astrocytes and the release of proinflammatory cytokines, such as tumor necrosis factor-α, interleukin-1β, and interleukin-6. This current study investigates whether mesencephalic astrocyte-derived neurotrophic factor (MANF) inhibits oxygen-glucose deprivation (OGD)-induced cell damage and inflammatory cytokine secretion by suppressing endoplasmic reticulum stress in rat primary astrocytes. We found that MANF alleviated OGD-induced astrocyte damage and rescued the cell viability, and the upregulation of GRP78 (endoplasmic reticulum (ER) stress marker) and NF-κB p65 (one of the central mediators of proinflammatory pathways) induced by OGD were significantly reduced by preincubation of MANF. In addition, the increases of secretion and mRNA expression levels of the proinflammatory cytokines IL-1β, IL-6, and TNF-α in astrocytes induced by OGD were significantly suppressed by MANF. These findings demonstrate that MANF shows the potential to alleviate cell damage and inflammation in rat primary astrocytes by suppressing ER stress, indicating that MANF plays an important role in astrocyte inflammation and functioning and may suggest a promising strategy for neuroprotection in the CNS.
authors.affiliation: Department of Orthopaedics, Qilu Hospital of Shandong University, Jinan, 250012, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhao
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Cheng
authors.forename: Ben
authors.initials: B
authors.lastname: Liu
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
authors.forename: Ying-Jun
authors.initials: YJ
authors.lastname: Guo
authors.forename: Lin
authors.initials: L
authors.lastname: Nie
mesh_terms: D000818:Animals; D001253:Astrocytes / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D015687:Cell Hypoxia; D002470:Cell Survival; D016207:Cytokines / Q000378:metabolism; D059865:Endoplasmic Reticulum Stress; D005947:Glucose / Q000172:deficiency; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism; D009414:Nerve Growth Factors / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D051996:Transcription Factor RelA / Q000235:genetics / Q000378:metabolism; D000091342:Endoplasmic Reticulum Chaperone BiP
chemical_list: D016207:Cytokines; D005947:Glucose; D006360:Heat-Shock Proteins; D009414:Nerve Growth Factors; D051996:Transcription Factor RelA; C051684:GRP78 protein, rat; D000091342:Endoplasmic Reticulum Chaperone BiP; C546826:MANF protein, rat