Objective To optimize the formulation of self-microemulsifying drug delivery systems containing tanshinone ⅡA(tanshinone ⅡA-SMEDDS) and assess the quality of tanshinone ⅡA-SMEDDS. Methods Pseudoternary phase diagrams were used to choose the oil,emulsifier,co-emulsifier,and their proportion in the formulation on the basis of the ability to form emulsions and regions. Then the self-emulsifying time,droplet and morphology,size distribution,?-potential,stability,and other aspects of the quality were evaluated. Results The formulation of tanshinone ⅡA-SMEDDS was as follows:ethyl oleate-Labrasol-PEG 400=10%:45%:45%,drug loading ratio was 2.25 mg/g. The self-microemulsifying time of tanshinone ⅡA-SMEDDS in 0.1 mol/L hydrochloric acid solution was less than 1 min,the emulsion drops were spherical shape with average particle size of (84.9?2.1) nm and the average ?-potential (-24.0?1.15) mV (n=3). So tanshinone ⅡA-SMEDDS was stable. Conclusion In this paper,the tanshinone ⅡA-SMEDDS has a good self-emulsifying performance. It is expected to further stabilize the preparation of tanshinone ⅡA self-microemulsifying agents.

Objective To explore the mechanism of lymphotactin(LTN) to exert mucosal adjuvant activity. Methods Complexes of chitosan-pVP1 and chitosan-pLTN were seperately prepared by co-cojugation method, then 50μg(DNA) of each complex was administered intranasally to male BALB/c mice 4times biweekly. Two weeks after the final immunization, mice were challenged with 3LD50 CVB3 to cause viral myocarditis, heart histopathological changes were examined 7 days later. Meanwhile, T cell immune responses, DC percentage and its membrane CD86 expression were monitored in spleen, mesenteric lymph node(MLN) and cervical lymph node(CLN). Results Co-immunizaiton with LTN remarkbly alleviated CVB3-induced cardial injury. This improvement was accompanied with enhanced T cell proliferation and IFN-γ-secreting ability, increased DC frequency and membrane CD86 expression both in spleen and mucosal draining lymph nodes( MLN, CLN). Conclusion LTN exerts its mucosal adjuvant function in augmenting specific T cell immune responses systemically and mucosally via DC enrichment in spleen, MLN and CLN and up-regulation of DC maturation.

Animals ; Cell Line, Tumor ; Female ; Humans ; Mammary Neoplasms, Experimental ; diagnosis ; metabolism ; pathology ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Organometallic Compounds ; pharmacology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Radioisotopes ; Radiopharmaceuticals ; pharmacology ; Random Allocation ; Rhenium ; Tumor Burden ; drug effects ; bcl-2-Associated X Protein ; metabolism

Objective To establish a method for the determination of alum residual amount in Rhizoma Pinelliae Preparata from different companies,and to provide a scientific evidence for quality evaluation of Rhizoma Pinelliae Preparata.Methods Na2EDTA titration method was applied for the quantitative analysis.Results There were obvious differences in residual quantity of alum in Rhizoma Pinelliae Preparata from different companies.Conclusion The method is simple,reproducible and accurate,it can be used for the determination of alum residual amount in Rhizoma Pinelliae Preparata.

DNA Damage ; DNA Glycosylases ; genetics ; metabolism ; DNA Repair Enzymes ; genetics ; metabolism ; Humans ; Phosphoric Monoester Hydrolases ; genetics ; metabolism

Child ; Child, Preschool ; Diagnostic Errors ; Female ; Humans ; Infant ; Infectious Mononucleosis ; diagnosis ; Male ; Suppuration ; diagnosis ; Tonsillitis ; diagnosis

Adolescent ; Adult ; Aged ; Bone Marrow ; pathology ; Child ; Female ; Humans ; Lymphoma, Non-Hodgkin ; diagnosis ; pathology ; Male ; Middle Aged ; Spleen ; pathology ; Young Adult

Bronchopulmonary Dysplasia ; therapy ; Humans ; Infant, Newborn

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Objective To investigate the role of ileocecal valve in children patients with intussus-ceptions by colonoscopy after pneumatic air enema reduction. Methods A total of 106 intussusceptions chil dren patients, who recovered with pneumatic air edema reduction, were recruited to the study. They underwent colonoscopy within 12 hours after reduction. The control group was composed of 103 children patients with both diarrhea and hematochezia. There was no significant difference in age, sex or weight between the two groups.Colonoscopic findings were recorded in terms of slack, swelling, prolapsus, lymphoid hyperplasia and mucosal lesions in ileocecal valve. Results In patients with intussusceptions, the rates of ileocecal valve slack, swelling including prolapsus, lymphoid hyperplasia and mucosal lesions were 61.3%, 33. 9%, 100. 0% and 31.1%, respectively, which were significantly different with those of the control group (P ＞ 0. 05 ). When further divided intussusceptions patients into groups with age more than 1 yr or less, significant differences were also observed in regarding of these features. Conclusion There is a close relationship between morphological and functional changes in ileocecal valve and intussusceptions in children. Ileocolic intussusceptions in patients younger than 1yr is more likely to be due to slack of ileocecal valve, while that in patients older than 1yr is mainly due to swelling or prolapse of ileocecal valve, represented by ileocecal intussuception.