title: Experimental study on the expression of HIF-1alpha and its relationship to apoptosis in tissues around cerebral bleeding loci.
abstract: The expression of hypoxia inducible factor-1 alpha (HIF-1alpha) and its relationship to apoptosis in tissues around cerebral bleeding loci was studied. The expression of HIF-1alpha and apoptosis in 37 samples of tissues around cerebral bleeding loci and 9 samples of normal cerebral tissues was assessed by immunohistochemical straining and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling methods. In 37 tissue samples around cerebral bleeding loci, the positive rate of the HIF-1alpha expression was 40.6%. Especially in the patients with amount of bleeding >60 ml, the positive rate (88.9%) of the HIF-1alpha expression was significantly higher than those with the amount of bleeding ranging from 30-45 ml or 45-60 ml (P<0.05). The expression of HIF-1alpha was increased as the amount of bleeding and operative time increased (P<0.05). There existed a positive correlation between HIF-1alpha labeling index and apoptosis index (n=12, r=0.56, P<0.01). These results suggested that the expression of HIF-1alpha was closely related with the time of hemorrhage and the amount of bleeding, and could induce the apoptosis of neurons.
authors.affiliation: Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Suiqiang
authors.initials: S
authors.lastname: Zhu
authors.forename: Zhouping
authors.initials: Z
authors.lastname: Tang
authors.forename: Shougang
authors.initials: S
authors.lastname: Guo
authors.forename: Lan
authors.initials: L
authors.lastname: Peng
authors.forename: Siyu
authors.initials: S
authors.lastname: Fang
authors.forename: Suming
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D017209:Apoptosis / Q000502:physiology*; D001921:Brain / Q000378:metabolism / Q000473:pathology*; D002543:Cerebral Hemorrhage / Q000378:metabolism / Q000473:pathology*; D004268:DNA-Binding Proteins / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D006801:Humans; D051793:Hypoxia-Inducible Factor 1; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009474:Neurons / Q000473:pathology; D009687:Nuclear Proteins / Q000096:biosynthesis* / Q000235:genetics; D013997:Time Factors; D014157:Transcription Factors / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D004268:DNA-Binding Proteins; C497442:HIF1A protein, human; D051793:Hypoxia-Inducible Factor 1; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D009687:Nuclear Proteins; D014157:Transcription Factors