AIM:ToexploretheeffectofcelastrolonapoptosisofSaos-2cellsanditsmechanism.METH-ODS:Saos-2 cells were treated with various concentrations of celastrol , and the cell viability was measured by MTT assay . Apoptosis and reactive oxygen species ( ROS) production were determined by flow cytometry .The protein levels of cleaved caspase-9, cleaved caspase-3 and phosphorylated JNK were evaluated by Western blot .RESULTS:The viability of Saos-2 cells was significantly inhibited by celastrol .Celastrol significantly induced apoptosis of Saos-2 cells.Celastrol signifi-cantly induced ROS production in the Saos-2 cells.Western blot analysis demonstrated that celastrol significantly increased the protein levels of cleaved caspase-9, cleaved caspase-3 and phosphorylated JNK in the Saos-2 cells.CONCLUSION:Celastrol induces caspase-dependent apoptosis through ROS/JNK pathway in Saos-2 cells.

Surgical resection and liver transplantation are still the preferred treatments for patients with hepatocellular carcinoma (HCC).For the patients with advanced HCC which are not suitable for surgical resection,traditional chemotherapy can not improve the prognosis.Molecular targeted therapy is a new method and tendency in the treatment of HCC.Multiple targets inhibitors,vascular endothelial growth factor inhibitors and monoclonal antibodies for HCC are widely researched and applied.

Objective To study the protective effects of propofol against ischemia/reperfusion injury in rat lung. Methods Rat model of pulmonary ischemia/reperfusion injury was used in this study. Rats were randomly divided into three groups, including sham opera-tion group (group A), iachemia/reperfusion group (group B) and propofol group (group C), 15 rats in each group. The concentration of tumor necrosis factor -α and interleukin-6 in bronchoalveolar lavage fluid (BALF) were measured by enzyme linked immunosorbent assay (ELISA). Then blood gas analysis, lung wet/dry (W/D) weight ratio were detected in each group. Results Propofol could significantly improve PaO2, reduce the W/D value and the contents of TNF-α and IL-6 in BALF. Conclusion Propofol effectively suppressed the pro-duction and release of inflammatory cytokine, therefore it can protect the lung from isehemia/reperfusion injury.

Objective To explore the effects of interstitial cells of liver cancer and normal liver cells co‐cultured on the biological function of liver cancer malignancy so as to understand the signal pathway involved by the interaction between these cells and confirm the role of interstitial cells in cancer progression in tumor microenvironment .Methods We co‐cultured interstitial cells or hepatocyte growth factor (HGF ) and human normal liver cell L‐02 ,and then detected the expressions of the tumor‐suppressing gene PTEN and the oncogene K‐RAS and changes of cell proliferation .The downstream signaling pathways were detected by Real‐time PCR and Western blot .Results The expression of PTEN was downregulated at the transcription level by 1 .15 times and translation level by 10 times (P<0 .05) ,while the transcription level and translation level of K‐RAS increased by 1 .4 times and more than 9 times , respectively ( P< 0 .05 ) in normal liver cells co‐cultured with liver cancer mesenchymal cells .The proliferation ability was increased by more than 2 times .ELISA experiment results showed that the medium from co‐culture contained HGF over 3 times more than the control group ( P<0 .05 ,1 085+108 vs .387+23) .At the same time ,cells in the experimental group expressed more than four times of cMET than the control group cells (P< 0 .05) .Exogenous HGF consistently promoted liver cell proliferation and viability (P<0 .05) .Conclusion Our study shows that liver cancer interstitial cells activate the HGF/cMET signaling pathway by secreting HGF and promote the proliferation of normal liver cells ,suggesting a new way to explore the molecular mechanism of tumor microenvironment in tumor development and treatment of hepatocellular carcinoma .

The ethical issues involved in the diagnosis and treatment of malignant tumors are increasing. Case teaching method is a teaching mode that has received much attention in recent years. This paper analyzed the com-mon ethical issues faced by clinical oncology at present, including tumor patients' right of informed consent, tumor patients' right of treatment option, and the hospice care for tumor patients and so on, and combined with cases, introduced the application of case teaching method in clinical oncology postgraduate ethics teaching.

【Objective】 To analyze the data of non-small cell lung cancer (NSCLC) gene chip using the bioinformatics method, screen differential expression genes (DEGs), and explore the biomarkers related to the prognosis of NSCLC so as to provide a new target for the treatment of NSCLC. 【Methods】 The NSCLC gene chip data were downloaded from the GEO database and the common DEGs in the two datasets were screened by GEO2R tool and FunRich3.1.3 software. The DAVID database was used in GO analysis and KEGG analysis of the DEGs. The protein-protein interaction (PPI) network was constructed using the STRING database; Cytoscape 3.8.0 software was used to select the top 20 hub genes. Then Kaplan-Meier plotter was used to analyze the prognosis of the identified hub genes, and multiple external databases were used to verify the expressions of the hub genes and their relationship with prognosis. 【Results】 A total of 159 intersect DEGs were screened from the two datasets. A total of 20 hub genes were identified via PPI network. Survival analysis and validation results from multiple external databases showed that SPP1 was highly expressed in NSCLC tumor tissues and was significantly correlated with the patients’ poor prognosis (P<0.05). The subgroup analysis showed that SPP1 might cause the poor prognosis by affecting lymph node metastasis. 【Conclusion】 SPP1 may be a biomarker for evaluating the prognosis of NSCLC patients, providing a new idea for the targeted therapy of NSCLC.

Dioscoreae Rhizoma formula granules are made from decoction pieces by decocting， extracting， separating， concentrating， drying and granulating， which have the advantages of simple dispensing， convenient use and easy to take without decoction. However， because Dioscoreae Rhizoma is rich in starch and mucus components， its extract powder and formula granules are poorly soluble and difficult to dissolve or disperse completely within 5 min， and the insoluble material is difficult to dissolve completely even after 24 h in water， which affects the quality evaluation of the formula granules and medication psychology of patients. Therefore， by studying the dissolution process and mechanism of Dioscoreae Rhizoma extract and its formula granules， it was found that the special chemical composition of Dioscoreae Rhizoma， the denaturation of starch and its compounding with protein and other substances during the high temperature extraction process， and the contraction of coating membrane during the spray drying process were combined to form the special microstructure of coating membrane covering starch granules， and it is the root cause of poor solubility of Dioscoreae Rhizoma formula granules. Based on the research on the structure， property and function of the powder， this paper proposed a technical strategy to improve the solubility of Dioscoreae Rhizoma formula granules by powder modification process， and experimentally demonstrated that the modified Dioscoreae Rhizoma formula granules could completely dissolve within 2 min， which solved the technical problem and could provide reference for the improvement of solubility of other similar varieties， and promote the high-quality development of traditional Chinese medicine formula granule industry.