Humans ; Occupational Exposure ; prevention & control ; Respiratory Protective Devices ; classification ; standards ; utilization ; United States

Objective: To establish a UPLC-MS/MS method for determining the plasma concentration of dihydrotanshinone I, tanshinone I, cryptotanshinone, and tanshinone IIA in rats, and to study the pharmacokinetics of Salvia miltiorrhiza diterpene quinones composition (SMDQC) and its solid dispersion micro-pellets (SDMP). Methods: Sprague-Dawley rats were ig administered with SMDQC and its SDMP, respectively. Then the blood samples were obtained at different time points. Electrospray ionization (ESI) source was applied and operated in the positive ion mode. The plasma concentration of dihydrotanshinone I, tanshinone I, cryptotanshinone, and tanshinone IIA was then detected by UPLC-MS/MS, and the pharmcoknetic parameters were calculated by DAS 2.1.1 program. Results: The RSDs of intra- and inter-day precisions of all analytes were less than 14.6%, and the average recoveries of the four active constituents were more than 74.49%. The pharmacokinetic results showed that after ig administration of SDMP, Cmax and AUC0-∞ of the four active constituents increased significantly compared with those of SMDQC. Conclusion: The method has the high sensitivity and selectivity, and proves to be suitable for the pharmacokinetic study of SMDQC and its SDMP. The results show that the SDMP could enhance the solubility of SMDQC to improve its absorption. The relative bioavailability of the four representative constituents is 138%-204% of the crude drug.

Objective:To observe and compare the clinical curative effect and safety of topiramate,carbamazepine and sodium valproate on the epilepsy secondary to encephalitis.Methods:80 cases of patients with epilepsy secondary to encephalitis who were treated in our hospital from January 2010 to September 2015 were selected and divided into the topiramate group,carbamazepine group and sodium valproate group,which were treated with topiramate,carbamazepine and sodium valproate respectively.The treatment effect,congnitive scores (including executive function and visual space,name,language,abstract,attention,delayed memory,directional),adverse reaction rate of three groups were compared.Results:The effective rate oftopiramate group was the highest(80.65％,25/31),carbamazepine was the lowest (70.00％,21/30),but there was no significant difference between the three groups (P＞0.05).After treatment,the scores of executive ability and visual spatial,naming,abstraction,attention,orientation,language in topiramate group were significantly higher than those of carbamazepine group and sodium valproate group (P＜0.05);the incidence of adverse reactions of topiramate group was 12.90％,which was significantly lower than that of carbamazepine group (36.67％) and sodium valproate group (29.62％)(P ＜ 0.05).Conclusions:Topiramate,carbamazepine and sodium valproate have equal therapeutic effect on epilepsy secondary to encephalitis,but topiramate had less adverse reactions and best safety.

Diagnosis, Differential ; Humans ; Intestinal Diseases ; etiology ; Intussusception ; etiology ; Pancreatitis ; complications ; diagnosis ; Purpura, Schoenlein-Henoch ; complications ; diagnosis

Adult ; Antineoplastic Agents ; therapeutic use ; Carcinoembryonic Antigen ; metabolism ; Carcinoma, Signet Ring Cell ; drug therapy ; metabolism ; pathology ; surgery ; Cell Transformation, Neoplastic ; pathology ; Cisplatin ; therapeutic use ; Female ; Humans ; Hysterectomy ; Keratin-20 ; metabolism ; Ovarian Neoplasms ; drug therapy ; metabolism ; pathology ; surgery ; Teratoma ; drug therapy ; metabolism ; pathology ; surgery

To analyze the composition regularity of Carthami Flos-containing prescriptions of the Drug Standards of Ministry of Health of People's Republic of China-Traditional Chinese Medicine Preparations (the ministerial standards for Traditional Chinese Medicine) based on the traditional Chinese medicine inheritance support system (TCMISS, RZDZ No. 0389952). Efforts were made to identify 331 prescriptions containing Carthami Flos and summarize 16 attending functions and 10 commonly used drug combinations. Three commonly used drug combinations were selected for an in-depth analysis on Carthami Flos's combined administration regularity. Based on Carthami Flos's attending functions, its effects in paralysis, traumatic injuries and dysmenorrheal were compared to analyze Carthami Flos's core drug combinations for treating different diseases. The regularity of clinical administration and the characteristics of commonly used drug combinations were summarized to provide reference for Carthami Flos's clinical application and new ideas for new drug R&D. Carthami Flos prescriptions was mainly used to treat blood stasis and pain and mostly combined with drugs that could activate blood, promote the circulation of qi and dispel pathogenic wind to treat Qi-stagnation and blood stasis caused by various pathogenic factors such as wind, cold and dampness.
Carthamus ; chemistry ; Clinical Trials as Topic ; Drug Prescriptions ; Drug Therapy ; Drugs, Chinese Herbal ; chemistry ; therapeutic use ; Flowers ; chemistry ; Humans

ADAM Proteins ; genetics ; ADAM17 Protein ; Animals ; Gene Library ; Genetic Vectors ; Male ; Mice ; Two-Hybrid System Techniques

Objective To purify,renature and explore the antiviral effects of recombinant cyanovirin-N(CV-N)on herpes simplex virus type 1(HSV-1).Methods The recombinant CV-N was purified with Ni Sepharose column and renatured by dilution method.The antiviral activities of CV-N were carried out in Vero cells by observing cytopathic effect(CPE)and by using MTT colorimetric assay for vital cell rate.Results SDS-PAGE showed that the purified protein was in the position of 11KDa with only one clear band.The renatured CV-N had little cytotoxic effect on Vero cells,it could not directly inactivate HSV-1 infectivity.CV-N not only interfered in adsorption of HSV-1 to Vero cells but also inhibited HSV-1 biosynthesis in the cells,which were more effective than the positive control Acyclovir.Conclusion CV-N exhibited pronounced antiviral activities agaist HSV-1,further development of CV-N might yield novel candidates of antiviral drugs.

AIM:To investigate the differences among Lenstar 900, A-scan ultrasound and keratometer in measurement of axial length ( AL ) , anterior chamber depth ( ACD ) and corneal curvature ( K1 , K2 , Km ) , and evaluate the consistency of the instruments, with the purpose providing references for the clinical application of Lenstar 900.
METHODS: In this study we picked up 36 patients ( 50 eyes ) underwent cataract surgery, and lens nucleus hardness were under level IV. Before the operation, AL, ACD and K1 , K2 , Km were measured by Lenstar 900, A-scan ultrasound and keratometer respectively. The differences between the results were compared by the paired t-test. The correlation of the results was analyzed by Pearson correlation analysis, and the consistency was measured by Bland-Ahamn method.
RESULTS: The mean AL and ACD values measured by Lenstar 900 and A-scan ultrasound had no significantly statistic differences (P>0. 05). The K1, K2, Km measured by Lenstar 900 and keratometer were not significantly statistical different (P>0. 05). The results measured by these three instruments had close linearity correlation ( r>0.9, P<0. 01). The consistency of the results was well in Bland-Ahamn analysis.
CONCLUSION:The preoperatively biometric result of Lenstar 900, A - scan ultrasound and keratometer in patients with cataract are all reliable, and they can be substituted by each other. However, Lenstar 900 can not only measure AL, ACD and corneal curvature at the same time, but also cornal thickness, lens thickness, white to white, pupil size, optical axis eccentricity, retinal thickness and so on. It has a number of advantages such as non-touching, convenient and efficient, and can be recommended to use widely.

AlM:To investigate the effect of teaching mode of problem- based learning ( PBL ) in the teaching of medical students' clinical ophthalmology.
METHODS: Five classes ( total 148 students ) were randomly selected as experimental group, using PBL method, at the same time another 5 classes ( total 151 students) were also randomly selected as control group, using lecture-based learning ( LBL) mode in 2010 grade. The scores of the experimental group were compared with control at the end of term. ln addition, students and teachers were respectively interviewed using self -administered questionnaire to obtain their evaluation for PBL practice.
RESULTS:The mean scores of PBL group (78. 35±7. 63) were significantly higher than control group (71. 68±6. 37) (P<0. 001). Most of students thought that their ability of referring, synthesizing and analyzing information was enhanced by PBL, and their skills both in written and oral were also improved. PBL made it easier to understand the contexts of course. lt was the best way to improve the effect of teaching in ophthalmology based on the increase of quality in novitiate that gives more chance to students of contacting with practice, developing the ability of clinical thinking and verifying the theory in clinical novitiate. Lots of teachers considered that the classroom atmosphere was more active, students were becoming more and more proactive on their classes and the relationship between students and teachers were more harmonious when PBL was used.
CONCLUSlON:Using PBL teaching mode can highly improve the teaching effectiveness of clinical epidemiology, which is worth popularizing.