Dynamic and long-lasting expression of thrombin receptor-1 after intracerebral hemorrhage in rats / 中国应用生理学杂志
Chinese Journal of Applied Physiology
;
(6): 328-332, 2007.
Article
in Chinese
| WPRIM
| ID: wpr-253410
ABSTRACT
<p><b>AIM</b>To study the dynamic and long-lasting expression of thrombin receptor after acute intracerebral hemorrhage (ICH) in rats.</p><p><b>METHODS</b>36 rats were randomly divided into 6 groups (n = 6) Normal group and ICH model groups at 6 hours, 24 hours, 3 days, 7 days and 14 days. ICH models were produced with the induction of collagenase type VII-S. Immunohistochemical method was used to detect PAR-1 protein and RT-PCR technique was used to detect PAR-1mRNA in brain tissue around the haematoma in different groups.</p><p><b>RESULTS</b>PAR-1 protein and mRNA were mild positive in normal group. In model groups, intensity of PAR-1 expression started to enhance at 6 hours, and enhanced more at 24 hours. PAR-1 expression reached the peak at 3 days and began to descend. At 7 days the descent was obvious and there was further descent at 14 days. At each time point, the PAR-1 protein positive cell number and PAR-1mRNA absorbance ratio in ICH model groups were significantly higher than those in normal group (P < 0.05 or P < 0.01). In addition, PAR-1 proteins were obviously expressed in vivo in brain capillary endothelial cell.</p><p><b>CONCLUSION</b>Functional PAR-1 exists in brain capillary endothelial cells. Activation of PAR-1 after ICH due to the stimulation of thrombin is not only the initiating agent of cerebral edema after ICH, but also participates the development of cerebral edema.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Thrombin
/
Cerebral Hemorrhage
/
Rats, Wistar
/
Receptor, PAR-1
/
Disease Models, Animal
/
Metabolism
Limits:
Animals
Language:
Chinese
Journal:
Chinese Journal of Applied Physiology
Year:
2007
Type:
Article
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