Objective To explore the extraction and assaying of the alkaloids from Bozhou Peony Paeonia lactiflora. Methods Dry root powder of the medical material was extracted by 90%ethanol. The extraction was first acidified by hydrochloric acid after recovering alcohol, and then extracted by dichloromethane. The acid solution was adjusted pH to alkalescence by ammonia water, then extracted by chloroform to get crude alkaloid. Bozhou Peony alkaloids were confirmed by TLC along with different colouration method, and its content was detected by acid-base titration. Results Four alkaloid-representative salmon patches were observed by colored with improving potassium heptaiodobismuthate method, and two prunosus blotches, four dark prunosus spots were delected by concentrated sulfuric acid and formaldehyde-concentrated sulfuric acid method, respectively. However, no chromogenic spots were found by colored with nitric acid as well with ninhydrin. The content of alkaloids in Bozhou Peony Paeonia lactiflora was about 0.079%. Conclusion Bozhou Peony Paeonia lactiflora contained alkaloid, and may including aconitum alkaloids.

Objective To investigate the effect of U0126 on brain edema and the expression of aquaporin 4 (AQP4) in rat brains after cerebral ischemic injury.Methods Totally 48 healthy male SD rats were divided randomly into ischemia group, treatment group and normal group.Rats in ischemia group and treatment group underwent middle cerebral artery occlusion by using an intraluminal thread method.Thirty minutes before operation, the rats in treatment group were injected into lateral cerebral ventricle with U0126, while rats in ischemia group accepted normal saline.24 hours after operation, the water content and Evans Blue in rat brains were determined as to exploring the degree of brain edema.Immunohistochemistry,Western blot and RT-PCR technique were applied to detect AQP4, p-ERK1/2 and p-ELK1.Results Compared with normal group, the water content and AQP4 expression in ischemia group were increased obviously.The water content and AQP4 expression in treatment group (protein:149.0?1.1,mRNA:0.328?0.010) were lower than those in ischemia group (protein:153.6?0.8,mRNA:0.400?0.015,P