To investigate and summarize the characteristics of mass media reports about medical disputs, and to analyze how the reports impact public perception and behaviors, and finally to propose some suggestions. A total of 385 people were conveniently randomizedly sampled to the survey, including 280 citizens in Beijing and 105 netizens. The results showed reporting modes by the mass media were diversified, and their truthfulness was various. Among them, 63.56% people thought the mass media reporting “medical disputs” almost supported the truthfulness, while 23.29% thought the mass media lacked truthfulness, because the format of the mass media reporting was fast speed rather than good quality. A total of 98.63% people thought the mass media has an impact on the public perception and behaviours, where 69.36% supported their positive aspects, while 30.64% showed negative. Based on the views above, it’s found that the mass media lacked right information of medicine. Therefore, in order to make a harmonious condition of doctor-patient relationship, it’s necessary to truly report the news with a scientific view, to build a platform for the information exchanges between hospitals and media, and to strengthen the social supervision and management.

Objective:To investigate the effect of S-phase kinase-associated protein 2 (SKP2) expression level on radiosensitivity of human hepatocellular carcinoma (HCC) cells and the correlation of SKP2 expression with clinical prognosis of patients with HCC.Methods:The expression levels of SKP2 gene in liver cancer tissues and normal tissues were validated and its correlation with clinical prognosis of HCC patients was analyzed based on the TCGA database. Western blot was used to determine the SKP2 protein levels in HCC cell lines before and after radiation. CRISPR/Cas9 technology was employed to delete the promoter and first exon of SKP2 gene in PLC/PRF/5 (PLC) and Hep3B HCC cells for generating the SKP2 knockout cell lines. The difference of radiosensitivity and cell survival rate between normal (SKP2 +/ +) and SKP2 knockout (SKP2 -/ -) HCC cells was determined by using cell clonogenic assay and CCK8 kit. Results:Compared with normal tissues, the expression levels of SKP2 gene in HCC were increased based on the results of TCGA database analysis. K-M analysis showed that the HCC patients with high SKP2 expression had relatively poor prognosis. The 5-year overall survival (OS) was 34.6% in high SKP2 expression HCC patients and 50.6% in low SKP2 expression HCC patients, respectively ( HR=2.18, 95% CI=1.46-3.27, P<0.001). In vitro experiment showed that the expression levels of SKP2 were significantly increased after radiation in HCC cells. Simultaneously, deletion of SKP2 significantly increased the radiosensitivity of HCC cells. Conclusion:The expression level of SKP2 gene is increased in HCC patients, and patients with high SKP2 expression have worse prognosis than those with low expression. Radiation can upregulate the SKP2 expression levels in HCC cells, while the radiosensitivity of the cells is significantly increased after SKP2 deletion.

Background Oral exposure to hexavalent chromium [Cr(VI)] can lead to gastrointestinal tumorigenesis in mice, and the mechanism is not yet clear. To predict health risk due to chemical exposure, data mining and computational toxicology analysis has become an important tool in toxicology research, which can help to elucidate mode of action (MOA) and identify key toxicity pathways. Objective This study aims to identify and evaluate key events in the MOA of oral Cr(VI) exposure. Methods Gene sets established from Comparative Toxicogenomics Database (CTD) and Gene Expression Omnibus (GEO) respectively were imported into Ingenuity® Pathway Analysis (IPA) software for pathway enrichment analysis and biological function analysis to identify potential key toxicity pathways of target organs/tissues toxicity of oral exposure to Cr(Ⅵ). Next, the weight of evidence (WOE) of the identified key toxicity pathways in the MOA of oral exposure to Cr(VI) was evaluated based on the modified Bradford Hill principle. Results A total of 54 pieces of literature related to oral Cr(VI) exposure were screened in CTD, among which 18 and 9 were related to liver and intestine with 125 and 272 corresponding genes, respectively. The pathway enrichment and biological function analysis results showed that liver and intestinal perturbation pathways were mainly related to cell stress and injury, cell cycle regulation, and apoptosis, indicating that Nrf2 pathway and AHR pathway might be the key toxicity pathways involved in the cytotoxic-mediated MOA. Meanwhile, the dose (≥170 mg·L⁻¹ sodium dichromate) and the time point (90 d) of the activation of Nrf2 pathway was similar to the emergence of crypt cell proliferation. It was proposed that Nrf2 pathway activation might be a key event for cytotoxic-mediated MOA of small intestinal tumors. The WOE results showed moderate validity of evidence in this hypothesis, with high validity of evidence for biological plausibility and dose-response manner. Conclusion Nrf2 pathway activation might be the key event in the cytotoxic-mediated MOA of small intestinal tumors induced by oral exposure to Cr(VI) via initiating or maintaining crypt cell proliferation.

Objective To investigate the molecular mechanism of taurine regulating the polarization of M2 macrophages by mitophagy. Methods THP-1 cells were divided into four groups: M0 group (THP-1 cells were treated by 100 nmol/L phorbol myristate ester for 48 hours to polarize into M0), M2 group (THP-1 cells were induced to polarize into M2 macrophages by 20 ng/mL interferon-4 (IL-4) for 48 hours), M2 combined with taurine groups (added with 40 or 80 mmol/L taurine on the basis of M2 macrophages). The mRNA expression of mannose receptor C type 1(MRC-1), C-C motif chemokine ligand 22(CCL22) and dendritic cell-specific ICAM-3 grabbing non-integrin (CD209) in M2 macrophages were detected by quantitative real-time PCR. Mitochondrial and lysosome probes were used to detect the number of mitochondria and lysosomes by multifunction microplate reader and confocal laser scanning microscope. The level of mitochondrial membrane potential (MMP) was detected by JC-1 MMP assay kit. The expression of mitophagy-related proteins PTEN-induced putative kinase 1 (PINK1) and microtubule-associated protein 1 light chain 3 (LC3) were detected by Western blot analysis. Results Compared with M0 group, the expression of MRC-1, CCL22, CD209 and PINK1, the number of mitochondria and the level of MMP in M2 group were significantly increased, whereas the number of lysosomes and LC3II/LC3I ratio were decreased. Compared with M2 group, the expressions of MRC-1, CCL22 and CD209, the number of mitochondria and the level of MMP in M2 combined with taurine group dropped significantly while the number of lysosomes was found increased, and the protein expression of PINK1 and LC3II/LC3I ratio were also increased. Conclusions The polarization of M2 macrophages is regulated by taurine to prevent excessive polarization via reducing the level of MMP, improving the level of mitophagy, reducing the number of mitochondria, and inhibiting the mRNA expression of polarization markers in M2 macrophages.
Mitophagy ; Taurine ; Macrophages/metabolism* ; Protein Kinases/metabolism* ; RNA, Messenger