Objective To investigate the efficacy of emodin in the treatment of acute pancreatitis in rats.Methods Forty-five SD rats were divided into control group,pancreatitis group and treatment group.The apoptotic index of pancreatic acinar cells.the expression of NF-κB mRNA and Bax mRNA,the apoptosis rate of peripheral polymorphonuclear neutrophil(PMN),and the expression of PMN caspase-3 and PMN caspase-8 were detected.Results Compared with the panereatitis group,the apoptotic index of pancreatic acinax cells and PMN,and the expressions of NF-κB mRNA,Bax mRNA.PMN caspase-3 and PMN caspase-8 in pancreas tissue were significantly increased in the treatment group(F=853.199,327.126,143.586,48.857,231.750,96.552,P＜0.05).The histopathologic score of panereatitis Was negatively correlated with the apoptotic index of the pancreatic acinar cells and PMN(r=-0.96,-0.94,P＜0.05).The apeptotic index ofthe pancreatic acinar cells Was positively correlated with the expression of NF-κB mRNA,Bax mRNA in pancreas tissue(r=0.73,0.76,P＜0.05).The expression of NF-κB mRNA was positively correlated withthat of Bax mRNA(r=0.94,P＜0.05).The apoptotie index of PMN was positively correlated with the expression of PMN caspase-3 and PMN caspase-8 (r=0.99,0.99.P＜0.05).Conclusions Emodin alleviates acute pancreatitis via regulating the apoptosis of pancreatic acinar cells through Bax pathway,and regulating the PMN apoptosis through caspase pathway.

Objective Non-muscle myosin heavy chain 9 (MYH9) plays an important regulatory role in the development of tumor.This study aimed to explore the expression of MYH9 in osteosarcoma tissues and its effects on epithelial-mesenchymal transition and invasion of osteosarcoma cells.Methods We collected 52 cases of osteosarcoma tissues and para-carcinoma tissues at 5 cm form the edge of the tumor.RT-PCR and immunohistochemistry were used to analyze the expression level of MYH9 mRNA and protein in the osteosarcoma tissues and para-carcinoma tissues.MYH9 shRNA plasmid was transfected into U2-OS cells to silenced the expression of MYH9, after transfected, the cells were divided into three groups: the normal U2-OS cells were the control group, the U2-OS cells transfected with empty plasmid were the empty group and U2-OS cells transfected with MYH9 shRNA were interference group.RT-PCR was used to detect the changes of MYH9 mRNA levels in the U2-OS cells, the protein level of MYH9, EMT related protein E-cadherin and Vimentin were detected by Western blot, and the ability of cell invasion was evaluated by Transwell assay.Results The results of RT-PCR showed that the relative expression MYH9 mRNA in para-carcinoma tissues(1.526±0.148) was significantly lower than that in cancer tissues (3.547±0.195) (P<0.05).The results of immunohistochemistry showed that MYH9 protein was mainly expressed in cytoplasm, and the expression in cancer tissues was significantly higher than that in para-carcinoma tissues, the positive expression rate were 59.6%(31/52) and 26.9%(14/52) respectively, the difference was statistically significant(P<0.05).The results of Western blot showed that the relative expression of MYH9 mRNA in interference group was significantly lower than that in control group and empty group (P<0.05) after silenced MYH9 gene, and compared with the control group, the E-cadherin in U2-OS cells was significantly up-regulated but the Vimentin was down-regulated.After 48h, all of the groups had cells through the microfiltration membrane, the numbers of cells through the microfiltration membrane in interference group(41.2±15.1) was significantly lower than that in control group(117.3±12.4) and empty group(193.5±14.7) (P<0.05).Conclusion The expression of MYH9 protein in osteosarcoma tissues was significantly higher than that in para-carcinoma t tissues, silenced MYH9 gene can reduce the invasive ability of osteosarcoma by reducing the epithelial interstitial transition.

Objective To explore the protective effect of atorvastatin on irradiated endothelium and the thrombomodulin(TM)expression.Methods Cultured human coronary artery endothelial cells(HCAEC)and human umbilical vein endothelial cells(HUVEC)were treated by atorvastatin at the final concentration of 10 μmol/ml for 10 min,and then irradiated with 2 and 25 Gy.Cell cycles status and TM expression were quantitatively measured by flow cytometry 24 hours after irradiation.Protein C activation in endothelial cells was also assessod.Results After administration with atorvastatin for 24 h,the TM expression increased by 77%,59% and 61% in normal control group,2 Gy group and 25 Gy group,respectively(t=27.395,26.420,58.065;P=0.000).The protein C levels decreased by 23% and 34% compared with the normal group post-irradiation to 2 and 25 Gy,but increased by 79% and 76% compared with the irradiated control group after administration with atorvastatin.The rates of cell apoptosis decreased by 6% and 16% in 2 Gy and 25 Gy groups,respectively after administration with atorvastatin for 24 h(t=4.178,17.863;P=0.000).Conclusions Atorva statin can protect endothelia cell from irradiation-induced apeptosis by increasing TM expression and protein C activation.

Objective　To compare the irradiation-protective and inter-synergestic effects of E838,WR-2721, Rubia cordifolia, cystamin e hydrochloride and ethinyl estradiol on radiation and combined radiation-burn injury. Methods　Above-mentioned drugs were given to the mice i ntraperitoneally, or intragastrcally, then, the mortality and the average surviv al d for 30 d were observed before and after the administration of the drug s. Results　①When drugs were before injury , the survival rate and the average survival d of the radiation and combined radiation-burn injured mice were increased obviously with the best effect in E838 and WR-2721. ②When drugs were given after injury, E838 and R. cordifolia also kept the effect. ③Combined appling WR-2721（pre) and E838（post）displayed a significant syner gistic reaction. Conclusion　E838 and WR-2721 are more e ffective than the others in the prevention of radiation.

OBJECTIVE：To prepare paclit axel and schisandrin B liposomes modified by cell penetrating peptide RPV ，and to preliminarily evaluate its anti-tumor activity in vitro . METHODS ：RPV modified paclitaxel and schisandrin B liposomes were prepared by film dispersion method. Box-Benhken design-response surface methodology was used to optimize the prescription technology of RPV modified paclitaxel and schisandrin B liposomes using the amount of cholesterol and paclitaxel ，the time interval of ultrasound probe as factors ，average entrapment efficiency of paclitaxel and schisandrin B was used as the index. The liposomes prepared by the optimal technology were characterized. Sulfonylrhodamine B staining method was used to investigate in vitro toxicity of RPV modified blank liposomes ，paclitaxel and schisandrin B liposomes ，RPV modified paclitaxel and schisandrin B liposomes to human ovarian cancer cell SK-OV- 3. The effects of 3 kinds of liposomes on the migration and invasion ability of SK-OV-3 cells were investigated by cell scratch test and Transwell chamber invasion test. RESULTS ：The optimal prescription technology was phospholipid 44 mg，cholesterol 8 mg，paclitaxel 0.64 mg，schisandrin B 1.5 mg，ultrasonic probe time interval 5 s，prescription dosage 5 mL. According to the optimal prescription technology ，the liposomes were spherical in shape ，and the particle size was （126.49±1.19）nm，Zeta-potential was （－4.83±0.61）mV，average entrapment efficiency of liposomes was （93.88±1.67）％. Compared with RPV modified blank liposomes ，after treated with paclitaxel and schisandrin B liposomes and RPV modified paclitaxel and schisandrin B liposomes ，the survival rate ，migration inhibition rate and invasion rate of SK-OV- 3 cells were significantly decreased （P＜0.05）. The effects of RPV modified paclitaxel and schisandrin B liposomes was better than those of paclitaxel and schisandrin B liposomes （P＜0.05）. CONCLUSIONS ：RPV modified paclitaxel and schisandra B liposome are successfu lly prepared ，and they have certain antitumor activity in vitro .

ObjectiveTo understand the health-related life quality and its influencing factors in elderly community residents in Shanghai， and to provide reference for improving their life quality. MethodsDuring April to June 2021， a cross-sectional survey was conducted in five selected community health care centers， from Baoshan District， Minhang District， Songjiang District and Pudong New District of Shanghai， respectively. The elderly residents aged 65 and over who received physical examination were face-to-face interviewed using EQ-5D-5L scale. SPSS 26.0 and Stata 16 were used for statistical analysis. Binary logistic regression， multiple linear regression and Tobit regression were used to analyze influencing factors of each dimension in EQ-5D scale， EQ-VAS score and health utility value. ResultsA total of 1302 elderly residents were included in the study， and the proportions of problems in the five dimensions of EQ-5D-5L scale were pain/discomfort （13.9%）， mobility （9.1%）， daily activity （5.8%）， self-care ability （4.8%） and anxiety/depression （3.6%）， while age was a factor influencing problems in each dimension. The average score of EQ-VAS was 84.28±10.32， and the average health utility value based on Chinese population was 0.97±0.08， which was higher than the rest of the country. Tobit regression analysis showed that female （t=-3.96， P<0.001）， age group over 75 （t=-5.28， P<0.001）， high school education or above （t=-2.53， P=0.012）， chronic disease （t=-5.12， P<0.001） had poor quality of life （P<0.05）. ConclusionThe overall quality of life of the elderly in Shanghai community is good， but the quality of life in the elderly women and in the group suffering from chronic diseases is relatively poor. It is necessary to pay more attention to the key populations to improve their health status.