Objective: To evaluate the effect of glucocorticoid on the treatment of acute cerebral stroke. Methods: Seventy-six patients with acute cerebral infarction were randomly divided into two treatment groups which included the group of intravenous infusion with dexamethasone 10 mg, Xuesaitong 0.4 g, and sodium citicoline 0.5 g Qd,and the group without dexamethasone treatment. Results: The infarction area enlarged on CT scan and the deficits of neural function accelerated in dexamethasone group. There was no change on CT scan and no neural function deterioration in patients without dexamethasone treatment. Conclusion:Side effect is obtained with the early use of dexamethasone for the treatment of acute ischemic cerebral stroke.

Objective: To establish an efficient expression system for human truncated insulin like growth factor 1 〔Des(1 3)IGF1〕as fusion protein in Escherichia coli(E.coli). Methods: The cDNA of Des(1 3)IGF1 was cloned into an fusion protein expression plasmid, pMTY4, using gene recombinant technique. The protein was purified by ion exchange chromatography and identified by SDS polyacrylamide gel electrophoresis, radioimmunoassay(RIA), N terminal amino acid sequence and biological activity. Results: A prokaryotic expression vector was constructed and the fusion protein containing MS2 polymerase fragment, thrombin recognition site and human Des(1 3)IGF1 was expressed in E.coli at high level. It was showed that the purified recombinant Des(1 3)IGF1 released from the fusion protein after digestion with thrombin was identical to the native Des(1 3)IGF1.Conclusion:This is an effective method for obtaining human recombinant Des(1 3)IGF1 and it is very important for further study of Des(1 3)IGF1.