Objective: To establish a method for HPLC determination of ursolic acid in Kangzhitong Jiangzhi Capsule.Methods: HPLC,chromatographic column Kromasil C18(4.6mm?250 mm,5?m)and the mobile phase consisted of methyl alcoholwater-ammonium acetate-acetonitrile(9∶25∶0.8∶65) were used to find ursolic acid.The flow rate was 1.0ml?min and the detector wave-length was set at 215nm.Results: The calibration curve was in good linearity over the range of 64-320?g/ml(r=0.9996).The average recovery rate was 100.10%,with RSD=1.32%.Conclusion: This method is simple,accurate and reproducible so it can be used to determine the content of ursolic acid in Kangzhitong Jiangzhi Capsule.

Objective To establish a reverse transcription loop-mediated isothermal amplification RT-LAMP rapid detection method of enterovirus 71(EV71) in hand ,foot and mouth disease (HFMD) ,and to evaluate its application.Methods Four types of LAMP primers were designed by using the software needle based on the 6 distinct regions of the specific gene of EV71.The process of amplification was completed in the ordinary thermostatic water container by 65 ℃ for 1200 min.The results of amplification were judged by electrophoresis and naked-eye.Seventy EV71 type intestinal positive specimens were simultaneously detected by RT-LAMP and RT-PCR methods.EV71 type of intestinal virus RNA were made a series.After 10 times of dilution ,the RT-LAMP and RT-PCR methods were used to conduct the detection for comparing their sensitivities.Results The LAMP characteristic ladder bands of EV71 appeared ,then the results could judged by the naked-eye.The detection rate in 100 EV71 samples had no statistical difference between RT-LAMP and RT-PCR methods (P>0.05).The sensitivity (10.0 pg/μL) of RT-LAMP was same to that of RT-PCR method.Conclusion The RT-LAMP detection method for EV71 was established ,which can be used for nucleic acid am-plification in the ordinary thermostatic water container.The preliminary application verifies that this RT-LAMP assay has a certain application prospect.

· As a member of the stem cells family, mesenchymal stem cells ( MSCs ) have been proved to be effective on the repair of tissue injury. Although the specific mechanism is still unclear, MSCs do have a promising future in retinal disease therapy.The results of the current research are diverse.We still have an urgent and long way to explore the details of MSCs.So it’s significant for further understanding of MSCs to analyze the possible mechanism and influencing factors.

To study the chemical constituents of Veratrum dahuricum (Turcz.) Loes. f., a new aurone glycoside named as (Z)-7, 4'-dimethoxy-6-hydroxyl-aurone-4-O-β-glucopyranoside was isolated from the 95% ethanol extracts of the rhizomes and roots of Veratrum dahuricum (Turcz.) Loes. f. by repeated column chromatography on silica gel and recrystallization. Its structure was established by extensive spectroscopic analyses, and its cytotoxicities against HepG-2, MCF7 and A549 cell lines were measured in vitro.
Benzofurans ; isolation & purification ; Cell Line, Tumor ; Glycosides ; isolation & purification ; Humans ; Plant Roots ; chemistry ; Plants, Medicinal ; chemistry ; Rhizome ; chemistry ; Veratrum ; chemistry

Animals ; Disease Models, Animal ; Parkinson Disease ; Zebrafish

Objective To investigate the critical thinking ability of medical students and its related factors in order to provide evidence for higher medical education reform. Methods A total of 325 medical students were selected by cluster sampling method, and Critical Thinking Disposition Inventory-Chinese Version (CTDI-CV) was adopted for survery. Results The average total score of critical thinking ability of medical students was above 280, and 51.08% of students showed positive critical thinking ability. Among all the seven critical thinking dispositions, average scores of each item were all positive (>40) except that the significance of truth seeking (37.23) and systematicity (39.05) were indefinite. There were significant differences in critical thinking ability between medical students with different gender and academic years (P<0.05). Conclusion The critical thinking ability of medical students is positive, however, there still exist some shortages. An equal relationship between teachers and students should be established, the traditional course system be continuously reformed, a good environment for clinical training be created, and a variety of teaching methods be implemented to further strengthen the critical thinking ability of medical students.

In this study, we explored the feasibility of biotin-mediated modified polymeric micelles for pancreatic cancer targeted photodynamic therapy. Poly (ethylene glycol)-distearoyl phosphatidyl ethanolamine (mPEG2000-DSPE) served as the drug-loaded material, biotin-poly(ethylene glycol)-distearoyl phosphatidyl ethanolamine (Biotin-PEG3400-DSPE) as the functional material and the polymeric micelles were prepared by a thin-film hydration method. The targeting capability of micelles was investigated by cell uptake assay in vitro and fluorescence imaging in vivo and the amounts of Biotin-PEG-DSPE were optimized accordingly. Hypocrellin B (HB), a novel photosensitizer was then encapsulated in biotinylated polymeric micelles and the anti-tumor efficacy was evaluated systemically in vitro and in vivo. The results showed that micelles with 5 mol % Biotin-PEG-DSPE demonstrated the best targeting capability than those with 20 mol % or 0.5 mol % of corresponding materials. This formulation has a small particle size [mean diameter of (36.74 ± 2.16) nm] with a homogeneous distribution and high encapsulation efficiency (80.06 ± 0.19) %. The following pharmacodynamics assays showed that the biotinylated micelles significantly enhanced the cytotoxicity of HB against tumor cells in vitro and inhibited tumor growth in vivo, suggesting a promising potential of this formulation for treatment of pancreatic cancer, especially those poorly permeable, or insensitive to radiotherapy and chemotherapy.

Objective To investigate an association between Toll-like receptor(TLR)4 Asp299Gly or CD14 C-260T polymorphisms and colorectal cancer in Chinese patients.Methods By a method of polymerase chain reaction-based restriction fragment length polymorphism(PCR-RFLP), TLR4 Asp299Gly and CD14 C-260T polymorphisms in unrelated 110 patients with colorectal cancer and 160 healthy controls in Chinese Han race population were genotyped.Results Significant differences of CD14 genotypes were found between healthy controls and the patients with colorectal cancer.The fre- quency of the CC genotype in healthy controls was extremely lower than that in the group of colorectal cancer(15.6% vs.31.8%,P=0.0027,OR=0.3968,95%CI:0.2209-0.7129)while the frequency of the CT genotype in healthy controls was significantly higher than that in the group of colorectal cancer (48.1% vs.30.9%,P=0.0056,OR=2.074,95%CI:1.246-3.452).No TLR4 Asp299Gly mutant genotype was detected in any patients and healthy controls in Chinese Han population.Conclusion The polymorphism of CD14 C-260T but not TLR4 Asp299Gly is associated with colorectal cancer in Chinese patients.

Objective To investigate the treatment method and prognostic factors of patients with non-Hodgkin lymphoma(NHL)of palatine tonsil.Methods 70 patients with NHL of palatine tonsil were re- viewed.According to Ann Arbor staging classification,12 patients had stageⅠ,39 stageⅡ,15 stageⅢand 4 stageⅣ.Working formulation was used in pathologic classification which was low grade 8 cases,intermedi- ate grade 28 cases and high grade 34 cases.30 cases were treated by chemotherapy alone,3 cases by radio- therapy alone,37 cases by chemotherapy and radiotherapy.Results The overall survival rate was 56.3%. They were 82.5% in 1 year,67.3% in 2 years and 58.5% in 5 years,respectively.The overall survival rates in high grade cases of pathologic classification were 20.0% in chemotherapy alone,0 in radiotherapy alone, 52.6% in chemotherapy and radiotherapy(P