Analysis of metabolic activities of cytochrome P450 isoenzyme is a crucial index to study drug/toxicant metabolism, drug-drug interaction, polymorphism and et al. Due to this practice, it is important to use the proper probe substrate and to conduct the experiment under optimal conditions. The validation information in literatures on the most common and newest in vitro probe substrates have been reviewed.

AIM: To establish the technique of precision-cut fibrotic liver slice (PCLS) and grope the optimal cultural conditions for researching the liver xenobiotic metabolism in vitro and the drug interaction. METHODS: Complex factors (higher fat diet, alcohol and CCl 4) were used to make the animal model of liver fibrosis. Fibrotic liver slices were prepared and cultivation system was established. Lactate dehydrogenase (LDH) leakage, glutathione S-transferase (GST) activity and 3[4,5-Dimethythiazole-2-yl]-2,5- diphenyltetrazolium bromide (MTT) reduction were chosen as indexes to assess the viability of the slice in different thickness, medium pH and cultural time. RESULTS: Rats were in earlier hepatic fibrosis after administration for 3 weeks. When the thickness of slices was 300 ?m and medium pH was 7.0, the LDH leakage, GST activity and MTT reduction could maintain on a steady level in 6 h. CONCLUSION: A 300 ?m of thickness, 7.0 of medium pH and 6 h of cultural time are the optimal slicing and culturing conditions for fibrotic liver slice.

Thymomas are most frequent primary tumors of anterior mediastinum.Surgery is the principal treatment method.Thymomas are sensitive to chemotherapy,and chemotherapy has showed a sig- nificant anti-tumor effect in locally advanced,recurrent or metastatic thymomas.Chemotherapy,radiother- apy or combined chemotherapy and radiotherapy before or after operation can offer patients excellent re- sponses,improve resectable rate.Some patients who are once inoperable obtain curative and palliative operation.Radiotherapy after operation can decrease residual tumor tissue,increase local control,de- crease recurrence,and prolong the survival.The multimodality therapy plays an important role in thy- moma treatment.

This article introduced the experiences of nongovernmental capital running hospitals in US,Germany,India and Israel and put forward some suggestions that need to be considered in China, such as innovating supply model of health care service,treating social capital running hospitals equally and strengthening supervision.

Objective To investigate the relation of Toll-like receptor 4 (TLR4)and monocyte chemoattractant protein-1 (MCP-1)with acute coronary syndrome.Methods 60 patients with coronary heart disease patients including 39 cases of a-cute coronary syndrome (ACS group),21 cases of stable angina (SA group)from January 2015-March 2016 in Xi’an First Hospital were in this observation.ACS group was divided into acute myocardial infarction (AMI,n=21)and unstable angina pectoris (UAP,n=18).Another 30 cases with angiographically normal was included in control group.Enzyme-linked immu-nosorbent assay (ELISA)detection was used to detect the serum content of MCP-1,TLR4 expression was tested by flow cy-tometry.Triglyceride (TG),total cholesterol (TC),low-density lipoprotein cholesterol (LDL-C)and high-density lipopro-tein cholesterol (HDL-C)were detected.Results TLR4 levels of ACS group was significantly higher than SA group (t=4.455,P=0.021).Serum MCP-1 levels of ACS group were significantly higher than SA group (t=3.220,P=0.002)and control group (t=6.197,P=0.000).MCP-1 levels of ACS group were higher than control group (t=2.306,P=0.025). The Spearman correlation test TLR4 was positively with MCP-1 (r=2.389,P=0.025).Conclusion MCP-1 and TLR4 may determine the severity of coronary heart disease,combined detection of MCP-1 and TRL4 can provide the clinical value for early diagnosis and treatment of ACS.

Aneurysm ; diagnosis ; Carotid Artery, Internal ; pathology ; Diagnostic Errors ; Female ; Humans ; Hypertrophy ; diagnosis ; Middle Aged ; Palatine Tonsil ; pathology

Animals ; Female ; Hydrocarbons ; toxicity ; Kidney ; drug effects ; ultrastructure ; Liver ; drug effects ; ultrastructure ; Male ; Mice

Objective:To evaluate the effect of preoxidation on the bonding strength of titanium to porcelain.Method:12 titanium plates(25 mm?3 mm?0.5 mm) were pre-oxidated according to usual preoxidation procedure and 12 without preoxidation were used as the controls.The samples(6 in each group) were then bonded with bonding porcelain,opaque porcelain,dentin porcelain and glaze of Duceratin(Degussa) or Vita titankeramik(Vita) respectively.The bonding strength of Ti/porcelain was evaluated using three-point bending test according to ISO 9693 1990 standard. The interface of Ti/porcelain bonding was observed by SEM.Results:Bonding strength(MPa) of Ti/Duceratin preoxided group and the corresponding control was 41.910?2.778 and 33.097?5.297(P0.05),respectively.SEM observation showed inter-lock and tight bonding of Ti/porcelain in pre-oxidated interface,more cracks and gaps between Ti and porcelain in non-pre-oxidated interface.Conclusion:Pre-oxidation may improve bonding strength of Ti/Duceratin system, while has no significant effect on bonding strength of Ti/Vita titankeramik system.

Objective To establish the method for detemining the content of ephedrine hydrochloride in Zhike Pingchuan Tangjiang by HPLC. Methods Diamonsil ODS1 C_(18) Column was used with acetonitrile -0.1% phosphoric solution (with 0.1% triehylamine) (3 : 97) as the mobile phase, the detection wavelength as 205 nm, and flow rate was 1.0 mL/min. Results The calibration curve was linear at the range of 0.12～ 0.96 ?g for ephedrine hydrochloride and linear equation was Y= 109759X+3792.8, r=0.9998. The average recovery was 98.4% and RSD was 0.87% (n =5). Conclusion This method was simple, accurate and proper, with good reproducibility. It can be used for quantitative analysis of ephedrine hydrochloride in Zhike Pingchuan Tangjiang.

Objective To evaluate the rate and types of human papillomavirus (HPV) in vulvar intraepithelial neoplasia (VIN).Methods We detected HPV DNA in 67 lesion tissues collected from 40 VIN patients with PCR based reverse line blot hybridization and DNA sequencing. The PCR using GP5/GP6 primers in HPV L1 region resulted in a 150-bp fragment. When the PCR did not amplify the target DNA,another PCR using SPF1/SPF2 primers was performed to amplify the 65-bp fragment.Results HPV DNA amplified with primers GP5/GP6 was positive in 52.2% (35/67) of the lesions. Of the 32 negative lesions,26 (81.2%) were positive for HPV DNA amplified with SPF1/SPF2 primers. The total positive rate was 91.0% (61/67). Ninety percent of the HPV belonged to high risk types. Sequencing data showed that the genotypes of 31 mono-infection lesions were the same as those of the reverse line blot results,yet the sequences in 4 multi-infection samples could not be determined. Of the 26 SPF PCR products,24 could be sequenced. 80.6% (25/31) patients with multiple lesions displayed the same genotype,suggesting HPV in the different lesions from the same patient was monoclonal.Conclusion The high risk type of HPV is associated with vulvar intraepithelial neoplasia and may play an important role in the development of invasive vulvar carcinoma.