[Protective effect of picroside â
¡ on the brain tissue through antioxidation in stroke rats].
Zhonghua Yi Xue Za Zhi
; 98(45): 3705-3710, 2018 Dec 04.
Article
em Zh
| MEDLINE
| ID: mdl-30526784
ABSTRACT
Objective:
To investigate the effect and mechanisms of picroside â ¡ on the brain tissue after cerebral ischemia reperfusion(I/R) in rats.Methods:
The middle cerebral artery occlusion(MCAO) rat model was established by inserting a monofilament into middle cerebral artery. The experimental rats were treated by injecting picroside â ¡ intraperitoneally. The modified neurological severity score (mNSS) and body weight were determined before modeling and after reperfusion of 22 h. The cerebral infarct volume was measured by TTC staining and the cerebral water content was measured in rats. At the same time, ROS content and NADPH oxidase activity were detected. The structure of neurons was observed by electron microscope and the mRNA and protein levels of Rac-1 and Nox2 were detected by RT-PCR and Western blotting.Results:
After modeling, the mNSS score was significantly increased (12.6±1.3 vs 0, P<0.001), while the body weight was lost (13.3%±2.5% vs 4.9%±0.8%, P<0.01). The cerebral infarct volume increased obviously (33.5%±3.4% vs 0, P<0.001), brain water content increased significantly (81.5%±0.9% vs 77.7%±0.9%, P<0.05) and the structure of neuron was damaged obviously. The protein and mRNA levels of Rac-1 and Nox2 were significantly increased (P<0.05). After treatment with picroside â ¡, mNSS score decreased significantly (7.9±0.8 vs 12.6±1.3, P<0.05) and the body weight increased obviously (9.3%±1.1% vs 13.3%±2.5%, P<0.05). The infarct volume of brain was significantly reduced (18.2%±1.9% vs 33.5%±3.4%, P<0.05), brain water content decreased obviously (79.1%±0.7% vs 81.5±0.9%, P<0.05), the morphological structures of neurons was restored, and the expressions of Rac-1 and Nox2 were significantly decreased (P<0.05).Conclusion:
It is suggested that picroside â ¡ could exert antioxidation to protect the brain tissue through inhibiting the expression of Rac-1 and Nox2.Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Isquemia Encefálica
/
Apoptose
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
Zh
Revista:
Zhonghua Yi Xue Za Zhi
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
China