Proteomic analysis of rat plasma following transient focal cerebral ischemia.

Abstract:

AIM:This study aimed to identify plasma protein changes in a rat model of ischemic stroke using a proteomic approach. MATERIALS & METHODS:Four male Sprague-Dawley rats (3-6 months old) were subjected to 90 min of left middle cerebral artery occlusion under anesthesia with 1.5% isoflurane in O(2)/air followed by 24-h reperfusion. Blood samples (~100 µl) were collected at baseline, at the end of 90-min middle cerebral artery occlusion and at 24-h postreperfusion. Brain injuries were assessed by MRI at 24-h postreperfusion. Quantitative comparison of global plasma protein expression was performed using 2D differential in-gel electrophoresis. Differentially expressed protein spots were identified using peptide sequencing tandem mass spectrometry. RESULTS:These rats had clear brain infarction in the left hemisphere detected by MRI. Thirty-three protein spots of plasma samples were differentially expressed following focal cerebral ischemia/reperfusion. These protein spots belonged to eight proteins. Six of them (α2-macroglobulin, complement C3, inter-α- trypsin inhibitor heavy chain H3, serum albumin, haptoglobin and transthyretin), which are a class of acute-phase proteins, changed significantly. CONCLUSION:This study describes the responses of young rats to focal cerebral ischemia and suggests that future studies should use aged animals to better mimic the clinical ischemic stroke setting.

journal_name

Biomark Med

journal_title

Biomarkers in medicine

authors

Chen R,Vendrell I,Chen CP,Cash D,O'Toole KG,Williams SA,Jones C,Preston JE,Wheeler JX

doi

10.2217/bmm.11.89

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

837-46

issue

6

eissn

1752-0363

issn

1752-0371

journal_volume

5

pub_type

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