title: Effects of echinacoside on histio-central levels of active mass in middle cerebral artery occlusion rats.
abstract: OBJECTIVE
  To investigate the effects of echinacoside on the extracellular striatal levels of norepinephrine (NE), dopamine (DA), homovanillic acid (HVA), 3, 4-dihydroxyphenylethanoid acid (DOPAC), 5-hydroxyindoleacetic acid (HIAA), and 5-hydroxytryptamine(5-HT) in middle cerebral artery occlusion (MCAO rats.
  
  
  METHODS
  The middle cerebral artery was occluded in male Sprague-Dawley rats. Three days later microdialysis probes were placed into the right striatum of MCAO rat brains and the brains were perfused with Ringer's solution at a rate of 1.5 microL/min. Cerebral microdialysates were collected every 30 minutes from awake and freely moving rats before assaying for NE, DA, HVA, DOPAC, HIAA, and 5-HT levels by reverse phase HPLC with electrochemistry.
  
  
  RESULTS
  Three days after MCAO, the extracellular striatal levels of NE, DA, DOPAC, HIAA, HVA, and 5-HT of the MCAO rats increased significantly (at least P < 0.05 vs. control). However, simultaneous treatment with echinacoside (30.0 or 15.0 mg/kg) attenuated these increases (at least P < 0.05 vs. non-treated model rats).
  
  
  CONCLUSIONS
  These results imply that echinacoside may protect striatal dopa minergic neurons from the injury induced by MCAO and may help prevent and treat cerebral ischemic diseases.
authors.affiliation: Ministry of Education Key Laboratory of Xinjiang Phytomedicine Resources, Shihezi University, Shihezi 832002, Xinjiang, China.
authors.forename: Li Li
authors.initials: LL
authors.lastname: Wei
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Peng Fei
authors.initials: PF
authors.lastname: Tu
authors.forename: Ming
authors.initials: M
authors.lastname: Zhong
authors.forename: Juan
authors.initials: J
authors.lastname: Du
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Chun Yang
authors.initials: CY
authors.lastname: Liu
mesh_terms: D000818:Animals; D006027:Glycosides / Q000494:pharmacology*; D020244:Infarction, Middle Cerebral Artery; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D006027:Glycosides; C060297:echinacoside