Aim To study the protective effects of limb remote ischemic postconditioning ( LRIP ) on is-chemic stroke rats under hyperglycemia and explore the mechanisms. Methods Rats were given 50% glucose (6 mL·kg-1 ) by intraperitoneal injection to get acute hyperglycemia model. Then middle cerebral artery oc-clusion ( MCAO) models were created. After blocking middle artery for 1. 5 h and reperfusion for 2 h, behav-ioral testing, infarct size of brain, NO concentration and SOD activity in the serum of those rats were detec- ted. Results LRIP could improve behavioral score, decrease the area of cerebral infarction, increase the concentration of NO and the SOD activity in serum of MCAO rats. Conclusion LRIP can relieve cerebral ischemia-reperfusion injury of MCAO rats under acute hyperglycemia.

Objective To study the expressions of osteopontin (OPN),caspase-3 and mt-P53 proteins, and their relationship in gliomas. Methods Seventy gliomas specimens of patients (glioma group) were selected, and 10 samples of non-glioma brain tissue were used as control group. The SP method was used to detect the positive rates of protein expressions of OPN, caspase-3 and mt-P53 between two groups. The relationship between protein expressions of OPN, caspase-3 and mt-P53 in gliomas and grade of gliomas were detected by Western blot assay. Spearman rank correlation was compared between the positive expression of OPN, caspase-3 and rate mt-P53. Results The positive expression rates of OPN and mt-P53 were significantly higher in glioma group (64.29%and 60%) than those of control group (no positive expression), but the positive expression rate of caspase-3 was significantly lower than that of control group (47.14%vs. 90%, P<0.05). There were no significant differences in OPN, caspase-3 and mt-P53 expressions between different gender, age, tumor size and tumor position (P>0.05). The higher the WHO classification, the higher the positive expression rates of OPN and mt-P53 (P<0.001), and the lower the positive expression rate of caspase-3 (P<0.001). With the increased level of glioma grade, OPN and mt-P53 protein levels were increased, but caspase-3 protein expression level was decreased. There was a negatively correlation between OPN and the positive expression of caspase-3, but there was a positive correlation between OPN and the expression of mt-P53 (rs=-0.720 and 0.722, P<0.05). There was a negative correlation between caspase-3 and mt-P53 expressions (rs=-0.556, P<0.05). Conclusion The higher the WHO classification, the higher the positive expression rates of OPN and mt-P53, while the lower the positive expression rate of caspase-3. The study reveals that OPN, caspase-3 and mt-P53 expressions are associated with the occurrence and the progress of gliomas. The combined detection of them can contribute to the judgment of biological behavior of gliomas.