OBJECTIVE:To establish a HPLC method for the determination of stavudine and related substances METHODS:The Hypersil C18(4 6mm?150mm,5?m)was used as analysis column The mobile phase was methanol-water(13∶87,V/V) Detection wavelength was 264nm The flow rate was 1ml/min The column temperature was 20℃ RESULTS:The calibration curves was linear in the concentration range of 0 025～0 3mg/ml(r=0 9 999,n=6) The average recovery was 99 26%(RSD=0 76%) The contents of stavudine in 3 batches of semifinished materials and stavudine capsules(imported and domestic)were 99 48%,99 55%,99 32%(materials);97 21%,101 54%,98 92%(imported stavudine capsule);100 57%,97 86%,102 33%(domestic stavudine capsule)respectively CONCLUSION:The method is simple,accurate,sensitive and repeatable and it is suitable for the determination of stavudine and its preparations

Objective To observe and analyse the application effect and value of problem based learning (PBL) combined evidence-based learning (EBL) in emergency medicine clinical teaching.Methods A total of 53 clinical medicine students were selected.The combined teaching method was applied in emergency clinical teaching.After the end of the teaching,the teaching effectiveness survey and theory test of the combined teaching group was performed,and the theory test scores was compared with the traditional teaching group.Results The combined teaching method could stimulate learning enthusiasm,improve learning efficiency,the abilities of selfstudy,literature retrieval,and the ability to analyze and solve problems.77.4％ of students thought this new teaching method had good application value in clinical teaching.Furthermore,the excellent rate of the theory test scores combined teaching group was better than traditional teaching group (41.5％ vs 15.6％,x2 =7.868,P =0.007).Conclusions The PBL joint EBL pedagogy can overcome diadvantages of tradional teaching and provide higher interest,ability of self-study as well as higher teaching quality of the medical students.It will be worth to spread in medical clinical teaching.

Objective To investigate the influence of high-level of glucose on the expression of ghrelin in human umbilical vein endothelial cells (HUVECs). Methods After 12 h glucose free culturing, the effects of different concentrations of glucose and different incubation times on expressions of ghrelin were observed in HUVECs. ( 1) The cells were treated with 0, 5, 10, 15, 20 mmol/L glucose for 2 h, then ghrelin mRNA expression levels were detected by RT-PCR, and the protein levels of ghrelin were detected by ELISA. (2) The cells were treated with 10 mmol/L glucose for 0, 0.5, 1, 2, 6, 12 hours, ghrelin mRNA and protein levels were detected respectively. Results (1) The expression levels of ghrelin mRNA and protein decreased along with increased glucose concentrations, which showed no obvious changes when the glucose was above 15 mmol/L. (2) The expression levels of ghrelin mRNA and protein decreased with the prolonged incubation time. But more than 6 h culturing time showed no further effect on reducing the expression level of ghrelin. Conclusion High levels of glucose can inhibit the expression level of ghrelin, which may be one of the mechanisms of atherosclerosis.

Objective:To investigate the expression of Cyclin D 1?p16?p27 and PCNA in glioma with different pathological classification, and to explore the correlationship among Cyclin D 1?p16?p27 and PCNA.Methods:Cyclin D 1?p16?p27 and PCNA protein expressions in 12 normal brain tissues and 58 glioma cases were examined by immunohistochemical staining and hemiquantity analysis.Results:With the increasing of glioma malignancy, the expression level of Cyclin D 1 protein increased gradually (P

Objective To compare the changes of serum levels of heme oxygenase‐1(HO‐1) ,C‐reactive protein(CRP) and Chitinase‐3‐1ike protein 1(YKL‐40) in patients with rectal cancer after laparoscopic‐assisted radical operation versus open radical surgery .Methods According the integration and elimination standard ,60 cases of patients with rectal cancer were selected and di‐vided into laparoscopic group (30 cases) and open group (30 cases) ,the concentrations of HO‐1 ,YKL‐40 and CRP in peripheral blood of patients were detected on the first and third postoperative day and preoperative day(P<0 .05) ,and were compared between the two groups .Results The serum levels of HO‐1 ,YKL‐40 and CRP in the laparoscopic group were significantly lower than those in the open group on the first and third postoperative day(P<0 .05) .The serum levels of HO‐1 ,YKL‐40 and CRP were significant‐ly increased after surgery ,and serum levels of HO‐1 and CRP on third postoperative day were significantly increased compared with that on the first postoperative day in the two groups after surgery ,while serum level of YKL‐40 on the third postoperative day was significantly lower than that on the first postoperative day in the two groups after surgery .Conclusion The stress reaction is com‐paratively mild in patients with rectal cancer after laparoscopic assisted radical operation ,and the postoperative period may be shor‐ter in patients treated with laparoscopic assisted radical operation than those treated with open radical surgery .

As a traditional Chinese herbal medicine, Polygonati Rhizoma widely distributed in most areas south of the Yangtze River. It has the function of nourishing liver and kidney, prolonging life and so on. Importantly, it is a Taoist Holy medicine since ancient times. Polygonati Rhizoma has high medicinal value and nutritional value because it contains polysaccharides, saponins, flavonoids, lignin, amino acids, quinones, vitamins, alkaloids and a variety of trace elements and so on. The domestic research institutions have carried out a deeper exploration, while its research is still at an early stage for foreign countries. At present, the experimental studies are mainly concentrated on the polysaccharides, ethanol, the extracts of saponins or the aqueous extracts of Polygonati Rhizoma. The experimental type is mainly based on the animal experiments and the clinical researches of Polygonati Rhizoma or its compound preparations. Various Polygonati Rhizoma preparations have been widely used in clinic, such as Polygonati Rhizoma Oral Liquid, Polygonati Rhizoma Tea, Cistanche and Polygonati Rhizoma Granules, Polygonati Rhizoma Zanyu Capsules, Polygonati Rhizoma essence oil patch and so on, which play different roles in individual products. In this paper, a comprehensive analysis was carried out on the basis of the latest experimental research on Polygonati Rhizoma, and its utility value was summed up from various angles, which provides a reference for the deep development and application of the Polygonati Rhizoma.

Protein arginine methyltransferase (PRMT) can methylate a variety of proteins,including histones and non-histones,affecting a variety of cellular processes such as transcription,RNA splicing,DNA repair,and cell cycle control.The activity of PRMT is affected by a variety of regulatory mechanisms,and its abnormal expression plays an important role in the development of the diseases,especially in tumors such as breast cancer and leukemia.PRMT has a unique value in the diagnosis or treatment of tumors.With the further exploration of PRMT methylation mechanism,PRMT selective inhibitors have made some progress.PRMT-specific inhibitors are expected to be targeted drugs for the treatment of tumors.

OBJECTIVETo study the molecular mechanism of extracts from Euodia rutaecarpa on hepatotoxicity in mice.

METHODTotally 30 KM mice were divided into 3 groups and orally administrated extracts from E. rutaecarpa for consecutively 15 days. The expressions of Erkl/2, CDK8, CK1e, Stat3 and Src were detected by Western blotting method.

RESULTThe extracts from E. rutaecarpa could up-regulated Erkl/2, CDK8 and CK1e expressions (P <0.01) and down-regulate Stat3 and Src (P <0.01).

CONCLUSIONThe molecular mechanism of E. rutaecarpa on hepatotoxicity may be correlated with Erkl/2, CDK8, CKle, Stat3 and Src signal molecules.

Alanine Transaminase ; blood ; Animals ; Aspartate Aminotransferases ; blood ; Down-Regulation ; Drugs, Chinese Herbal ; toxicity ; Evodia ; chemistry ; Female ; Fruit ; chemistry ; Gene Expression Regulation ; drug effects ; Liver ; drug effects ; metabolism ; Male ; Mice ; Plants, Medicinal ; Signal Transduction ; drug effects ; Specific Pathogen-Free Organisms ; Triglycerides ; blood ; Up-Regulation

OBJECTIVETo determine the recognition of healthy medical students on deqi after acupuncture, reveal the qualitative and quantitative rules of deqi and understand whether these rules are the factors of the clinical application of acupuncture therapy.

METHODSThe class questionnaires were used for the investigation study on the understanding of deqi after acupuncture at Hegu (LI 4) or Zusanli (ST 36) in 86 healthy students in the clinical medicine class.

RESULTS(1) Deqi was a kind of complicated compound feelings, with many sensation qualities such as distending pain, distension and pain. (2) Deqi was a kind of mild and moderate sensations. In 10-score credit sys tem of Massachusetts General Hospital acupuncture sensation scale (MASS), the scores of distending pain (4.69 +/- 2.83), distension (4.39 +/- 2.91) and soreness and distension (3.93 +/- 2.93) were around 5 (moderate degree), the scores of stabbing pain (1.89 +/- 2.02) were around 2 (mild degree). (3) The differences in the quantitative scores were significant for stabbing pain, distending pain, distention, soreness and distention and the others before and after treatment (all P<0.05).

CONCLUSIONDeqi of acupuncture is the mild and moderate complicated sensations manifested as distension, soreness, pain and numbness. As the invasive therapy, the filiform needle puncture will bring a certain psychological impacts on the receptors. The subjective sensation is possibly the factor for the patients' selection of acupuncture treatment.

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; methods ; Adult ; China ; Female ; Humans ; Male ; Needles ; Qi ; Schools, Medical ; Sensation ; Young Adult

Objective To investigate the clinical efficacy of the laparoscopic Roux-en-Y gastric bypass (LRYGB) and metformin in the treatment of obese patients with type 2 diabetes mellitus,and influencing factors of remission rate of diabetes.Methods The case-control study was conducted.The clinical data of 172 obese patients with type 2 diabetes mellitus who were admitted to the First People's Hospital of Shangqiu (43 patients) and the First Affiliated Hospital of Sun Yat-sen University (129 patients) from June 2010 to June 2015 were collected.Of 172 patients,82 undergoing LRYGB were allocated into the group A and 90 taking oral metformin were allocated into the group B.Observation indicators:(1) follow-up situations;(2) comparison of metabolic indices after treatment between the 2 groups;(3) influencing factors analysis of remission rate of diabetes in patients undergoing LRYGB;(4) influencing factors analysis of remission rate of diabetes in patients taking oral metformin.Follow-up using outpatient examination and telephone interview was performed to detect occurrence of treatment-related complications up to January 2017,and metabolic indices were measured regularly.Measurement data with normal distribution were represented as ±s and comparison between groups was analyzed using the independent-sample t test.Repeated measurement data were analyzed by the repeated measures ANOVA.Comparisons of count data were evaluated by the chi-square test.The univariate analysis and multivariate analysis were respectively done using the chi-square test and Logistic regression model.Results (1) Follow-up situations:172 patients were followed up after treatment for 19-43 months,with a median time of 28 months.During the follow-up,5 patients complicated with mild diarrhea and 1 complicated with iron deficiency anemia at 1 year postoperatively were improved by symptomatic treatment in the group A,and there was no treatment-related complications in the group B.(2) Comparison of metabolic indices after treatment between 2 groups:body mass,BMI,2-hour postprandial blood glucose (2HPBG),2-hour postprandial serum C-peptide,glycosylated hemoglobin (GHb),fasting insulin,2-hour postprandial insulin (2HPI),low-density lipoprotein (LDL) and cases with hypertension in the group A were (89±6) kg,(31.5±2.0) kg/m2,(19.4±3.9) mmol/L,(3.52± 0.32) μg/L,15.7％ ±5.3％,(8.0± 1.4) uIU/L,(20.6± 2.5) uIU/L,(3.7 ± 1.3) mmol/L,24 before LRYGB and(77±16)kg,(24.2±2.9)kg/m2,(10.6±2.6) mmol/L,(7.19± 2.23) μg/L,5.3％±4.5％,(9.2± 4.3)uIU/L,(28.3±2.9)uIU/L,(2.2±2.1)mmol/L,9 after LRYGB,respectively,with statistically significant differences between preoperative and postoperative indicators (F=2.112,3.026,1.253,2.107,1.257,3.473,1.223,2.584,x2 =8.540,P ＜ 0.05).Fasting blood glucose,2HPBG,fasting serum C-peptide,2-hour postprandial serum C-peptide,GHb,fasting insulin and 2HPI in the group B were (11.3±2.5)mmol/L,(18.5± 4.4) mmol/L,(1.54±0.33) μg/L,(3.57±0.91) μg/L,17.5％ ±8.0％,(8.2± 1.3) uIU/L,(21.2±2.6) uIU/L before taking oral metformin and (6.6 ± 1.1) mmol/L,(10.2 ± 2.8) mmol/L,(3.52 ± 1.34) μg/L,(7.68 ± 1.94) μg/L,5.4％ ±2.1％,(9.6± 3.9) uIU/L,(30.3± 3.1) uIU/L after taking oral metformin,respectively,with statistically significant differences between before and after taking oral metformin (F=1.245,3.224,3.127,2.064,3.672,2.074,1.137,P＜0.05).Remission rate of diabetes and excess weight loss (EWL) in patients after treatment were 14.6％,80％ ± 15％ in the group A and 11.1％,60％ ± 10％ in the group B,respectively.There were statistically significant differences in body mass,BMI and EWL after treatment between the 2 groups (t=1.973,2.326,2.347,P＜0.05),and no statistically significant difference in remission rate of diabetes between the 2 groups (x2 =0.477,P＞0.05).(3) Influencing factors analysis of remission rate of diabetes in patients undergoing LRYGB:the results of univariate analysis showed that BMI,diabetes duration and LDL were factors affecting remission rate of diabetes in patients undergoing LRYGB,with statistically significant differences (x2=11.267,9.519,5.567,P＜0.05).The results of multivariate analysis showed that diabetes duration ＜ 10 years was an independent factor affecting good remission rate of diabetes in patients undergoing LRYGB,with statistically significant differences [OR=2.202,95％ confidence interval (CI):1.418-3.420,P＜0.05].(4) Influencing factors analysis of remission rate of diabetes in patients taking oral metformin:the results of univariate analysis showed that diabetes duration,GHb and LDL were factors affecting remission rate of diabetes in patients taking oral metformin,with statistically significant differences (x2 =6.306,7.758,4.652,P＜0.05).The results of multivariate analysis showed that GHb ＜ 15.0％ was an independent factor affecting good remission rate of diabetes in patients taking oral metformin,with statistically significant differences (OR=3.167,95％CI:1.586-6.325,P＜0.05).Conclusions LRYGB and oral metformin in the treatment of obese patients with type 2 diabetes mellitus are safe and effective,showing an equivalent remission rate of diabetes,and LRYGB had an advantage of weight loss.Diabetes duration ＜ 10 years and GHb ＜ 15.0％ are respectively independent factors affecting good remission rate of diabetes in patients undergoing LRYGB and taking oral metformin.