title: [Expression of dynamin-1 and phosphor-dynamin-1 in the hippocampus of children and rats with mesial temporal lobe epilepsy].
abstract: OBJECTIVE
  To observe the expression of dynamin-1 and phosphor-dynamin-1 in the hippocampus of children and rats with mesial temporal lobe epilepsy (MTLE) and to investigate the roles of dynamin-1 and phosphor-dynamin-1 in the development of MTLE.
  
  
  METHODS
  Male Sprague-Dawley rats (aged 25 days) were randomly divided into acute control (AC), acute seizure (AS), latent control (LC), latent seizure (LS), chronic control (CC) and chronic spontaneous seizure (CS) groups. Lithium chloride-pilocarpine was used to induce a rat model of MTLE. The hippocampus samples of 5 children with a pathologically confirmed hippocampal sclerosis who received surgical operation were collected as a human model (HM) group, and the hippocampus samples of 4 dead children (without organic lesion of the hippocampus) were collected by autopsy as a human control (HC) group. The expression of dynamin-1 and phosphor-dynamin-1 in the hippocampus of children and rats with MTLE was measured by Western blot and immunohistochemistry.
  
  
  RESULTS
  The Western blot showed that the expression of phosphor-dynamin-1 was significantly lower in the AS and CS groups than in the corresponding control groups (AC and CC groups) (P<0.05). The expression of phosphor-dynamin-1 was significantly lower in the HM group than in the HC group (P<0.05). There were no significant differences in the expression of dynamin-1 among the AS, LS and CS groups and between the HM and HC groups (P>0.05). The immunohistochemical results showed that phosphor-dynamin-1 was highly expressed in the cytoplasm of hippocampal neurons of AC, CC and HC groups, but its expression was significantly reduced in the AS, CS and HM groups (P<0.05).
  
  
  CONCLUSIONS
  The expression of phosphor-dynamin-1, not dynamin-1, is downregulated in the hippocampus of children and rats with MTLE during seizures, which suggests that the phosphorylation/dephosphorylation of dynamin-1 may be involved in the development of MTLE.
authors: Department of Pediatrics, Xiangya Hospital of Central South University, Changsha, China.
authors: Ci-Liu
authors: CL
authors: Zhang
authors: Fei
authors: F
authors: Yin
authors: Zhi-Quan
authors: ZQ
authors: Yang
authors: Fang
authors: F
authors: He
authors: Chen
authors: C
authors: Chen
authors: Shang-Jun
authors: SJ
authors: Jiang
authors: Jing
authors: J
authors: Peng
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002648:Child; D034284:Dynamin I / Q000032:analysis / Q000378:metabolism*; D004833:Epilepsy, Temporal Lobe / Q000378:metabolism*; D005260:Female; D006624:Hippocampus / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D010766:Phosphorylation; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D034284:Dynamin I