Solanine induces the apoptosis of human prostate cancer cells via ROS/p38 signaling pathway / 西安交通大学学报(医学版)

Objective To investigate the molecular mechanism of solanine-induced apoptosis of prostate cancer cells Du145 and LNCaP.Methods The effects of solanine on the viability of Du145 and LNCaP cells were evaluated by MTT assay.The generation of intracellular reactive oxygen species (ROS) and solanine-induced apoptosis were measured by flow cytometry.The protein levels of p38 and p-p38 expressions were examined by Western blot.Results Solanine significantly inhibited the viability of Du145 and LNCaP cells in a dose-dependent manner (P＜0.01).The inhibition of solanine on cell viability was suppressed by the ROS scavenger NAC.ROS generation,apoptosis and phosphorylation of p38 were induced by treatment with solanine at 40 μmol/L for 24 h.The expression of p38 and solanine-induced apoptosis were suppressed by NAC and SB203580.Conclusion Solanine induces the apoptosis of human prostate cancer cell via the RO.S-p38 signaling pathway.

Impact of medical staff loyalty on patient satisfaction:a study based on structural equation model / 中华医院管理杂志

Objective To learn the relationship and operating mechanism between medical staff's loyalty and patient satisfaction.Methods Medical staff and inpatients of a tertiary hospital in Nanjing were sampled at a 1:2 ratio for study,with 840 questionnaires released and 269 valid questionnaires recovered;medical staff service quality as perceived by inpatients served as the intermediate variable,with Mplus7.0 used to build a structural formula model for an empirical study of the relationship between staff loyalty and patient satisfaction.Results Staff loyalty exerts certain positive influence on patient satisfaction and staff service quality ( P direct effect value 0.143).Conclusions Structural formula model can reveal the relationship and extent of the influence of staff loyalty on patient satisfaction.This indicates that hospitals should enhance the loyalty,medical competence and communication skills of their medical staff for higher patient satisfaction.

A meta-analysis of fish intake and the risk of renal cell cancer / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the association of fish intake with the risk of renal cancer.</p><p><b>METHODS</b>PubMed, Embase, CNKI and CA databases were searched for case-control studies or cohort studies examining the relationship between fish or fish products intake and renal cancer. Heterogeneity among the selected studies was assessed using I2 score, and the publication bias was assessed using funnel plots.</p><p><b>RESULTS</b>Seventeen articles were included in the analysis with a heterogeneity across the studies (P=0.003, I(2)=52.3%). A random-effects model was used to generate the pooled risk ratio (RR) and 95% confidence interval (CI), and no statistically significant association was found between the risk of renal cancer and fish intake (RR=0.90; 95% CI, 0.78-1.02). In subgroup analysis, no evidence was found that the study design, study region or publication date influenced the results; but in the gender subgroup analysis, fish intake we found to decrease the risk of renal cancer in men but not in women.</p><p><b>CONCLUSION</b>The results of meta-analysis do not support an association between fish intake and a lowered risk of renal cancer.</p>

Construction of a recombinant lentiviral vector of p38 MAPK and establishment of a human prostatic carcinoma cell line stably expressing p38 MAPK / 南方医科大学学报

<p><b>OBJECTIVE</b>To construct a recombinant lentiviral vector for p38 MAPK and establish a human prostatic carcinoma cell line that stably expresses p38 MAPK.</p><p><b>METHODS</b>EGFP/p38 fusion gene was subcloned into the lentiviral vector pTYF- EF1α-IRES-EGFP. The recombinant lentiviral vector pTYF-EF1α-EGFP/p38 was indentified by restriction enzyme digestion, and packaged in HEK 293T cells using lipofectamintm2000 with the packaging plasmid psPAX2 and envelope plasmid pMD2.G. The viral titer was tested according to the expression level of GFP. The resulting recombinant lentiviral vector was transduced into human prostatic carcinoma DU145 cells, and stably transduced cells were selected by limiting dilution analysis. The intracellular expression level of total p38 was detected by Western blotting and the cell growth curve was drawn.</p><p><b>RESULTS</b>DNA restriction enzyme digestion demonstrated that the recombinant lentiviral vector of the fusion gene EGFP/p38 (pTYF-EF1α-EGFP/p38) was constructed successfully. The recombinant lentiviral vector was packaged in 293T with a viral titer of 4.7×10(6) TU/ml. A stable cell line, EGFP/p38-DU145, was established, which stably expressed exogenous EGFP/p38 MAPK fusion protein as detected by Western blotting and showed a lowered growth rate compared to the control cells.</p><p><b>CONCLUSION</b>We have successfully constructed a recombinant lentiviral vector of the fusion gene EGFP/p38 and established a stable cell line EGFP/p38-DU145. Overexpression of p38 has a significant inhibitory effect on the proliferation of DU145 cells in vitro.</p>