title: TDAG8 activation attenuates cerebral ischaemia-reperfusion injury via Akt signalling in rats.
abstract: T-cell death-associated gene 8 (TDAG8), a member of the proton-sensitive G-protein-coupled receptor (GPCR) class with an immune-specific expression profile, was recently shown to be expressed in the rat brain; however, its role in ischaemic stroke remains unknown.
  
  
  
  We initially confirmed the time-dependent expression of TDAG8 in rat brain tissue after ischaemic stroke and reperfusion. Further evaluations were performed to increase TDAG8 expression 6h prior to middle cerebral artery occlusion (MCAO) by injecting a specific agonist, BTB09089, into the lateral ventricle to increase TDAG8 expression. Twenty-four hours before MCAO, a specific small interfering RNA (siRNA) was introduced. The infarction volume, neurological deficit score and cleaved caspase-3 and Bcl-2 expression were used to assess the effects of TDAG8 on ischaemic stroke. Finally, the effects of TDAG8 on the development of primary cortical neurons exposed to oxygen-glucose deprivation (OGD) were investigated.
  
  
  
  TDAG8 expression increased both in vivo and in vitro. Pretreatment with BTB09089 up-regulated TDAG8 and Bcl-2 expression and down-regulated cleaved caspase-3 expression, while the infarction volume was reduced, and neurological deficits were ameliorated 24 and 72h after MCAO. However, the protective effects of TDAG8 were reversed when its level was reduced in TDAG8-deficient rats. More importantly, these findings are consistent with data from neurons subjected to OGD.
  
  
  
  TDAG8 plays an important neuroprotective role through inhibition of neuronal apoptosis and alleviation of neurological deficits by activating the Akt signalling pathway in rats.
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China.
authors.forename: X D
authors.initials: XD
authors.lastname: Ma
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China.
authors.forename: L H
authors.initials: LH
authors.lastname: Hang
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China. Electronic address: 13805281211@163.com.
authors.forename: D H
authors.initials: DH
authors.lastname: Shao
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China.
authors.forename: W W
authors.initials: WW
authors.lastname: Shu
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China.
authors.forename: X L
authors.initials: XL
authors.lastname: Hu
authors.affiliation: Department of Anaesthesiology, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212002, China.
authors.forename: H
authors.initials: H
authors.lastname: Luo
mesh_terms: D000818:Animals; D002545:Brain Ischemia / Q000150:complications / Q000188:drug therapy / Q000378:metabolism*; D002478:Cells, Cultured; D002540:Cerebral Cortex / Q000166:cytology; D004195:Disease Models, Animal; D004622:Embryo, Mammalian; D005786:Gene Expression Regulation / Q000187:drug effects / Q000502:physiology; D005947:Glucose / Q000172:deficiency; D000860:Hypoxia / Q000188:drug therapy / Q000378:metabolism; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008297:Male; D009422:Nervous System Diseases / Q000188:drug therapy / Q000209:etiology; D009474:Neurons / Q000187:drug effects; D051058:Oncogene Protein v-akt / Q000378:metabolism*; D010751:Phosphopyruvate Hydratase / Q000378:metabolism; D011724:Pyridazines / Q000494:pharmacology / Q000627:therapeutic use; D034741:RNA, Small Interfering / Q000627:therapeutic use; D051381:Rats; D017207:Rats, Sprague-Dawley; D043562:Receptors, G-Protein-Coupled / Q000235:genetics / Q000378:metabolism*; D015427:Reperfusion Injury / Q000150:complications / Q000188:drug therapy / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D013829:Thiadiazines / Q000494:pharmacology / Q000627:therapeutic use
chemical_list: C574797:3-((2,4-dichlorobenzyl)thio)-1,6-dimethyl-5,6-dihydro-1H-pyridazino(4,5-e)(1,3,4)thiadiazin-5-one; C542490:GPR65 protein, rat; D011724:Pyridazines; D034741:RNA, Small Interfering; D043562:Receptors, G-Protein-Coupled; D013829:Thiadiazines; D007770:L-Lactate Dehydrogenase; D051058:Oncogene Protein v-akt; D010751:Phosphopyruvate Hydratase; D005947:Glucose
keywords: Apoptosis; BTB09089; MCAO; Neuroprotection; OGD; TDAG8