OBJECTIVE: To investigate the potential effect of NALP3 inflammasome on the occurrence and development of nonalcoholic steatohepatitis (NASH). METHODS: THP-1 macrophages were cultured for 24 h by palmitic acid at various concentrations. The THP-1 macrophages were pretreated with N-acetyl-cysteine at different doses for 24 h before the palmitic acid cultivation. ROS production was determined by flow cytometry. The expression of IL- 1β was detected by ELISA; the expressions of NALP3 protein and caspase-1 protein were detected by immunofluorescence; NALP3, ASC, and caspase-1 mRNA were measured by real-time PCR. RESULTS: Compared with the THP-1 macrophages without palmitic acid, the level of ROS, NALP3 protein and caspase-1 protein, and the expression of IL-1β were increased after palmitic acid treatment in a dose dependent manner (P<0.05). Compared with the THP-1 macrophages with palmitic acid (400 μmol/L), the level of NALP3 mRNA (P<0.05), the level of NALP3 protein and caspase-1 protein (P<0.05), the expression of IL-1β (P<0.05) were decreased after preadministration of N-acetyl-cysteine in a dose dependent manner. CONCLUSION ROS induced by free fatty acid can regulate the activation of NALP3 inflammasome signaling pathway leading to the release of inflammatory cytokines. This pathway may be the possible mechanism of NASH.
Carrier Proteins ; metabolism ; Caspase 1 ; metabolism ; Cell Line ; Fatty Acids, Nonesterified ; chemistry ; Humans ; Inflammasomes ; metabolism ; Interleukin-1beta ; metabolism ; Macrophages ; cytology ; NLR Family, Pyrin Domain-Containing 3 Protein ; Reactive Oxygen Species ; metabolism ; Real-Time Polymerase Chain Reaction ; Signal Transduction

Objective:To investigate the relationship between metabolic syndrome (MetS) and clinicopathological characteristics of patients with gastric cancer.Methods:The clinicopathological data of 245 patients with gastric cancer diagnosed by pathology in Xinzhou People's Hospital of Shanxi Province from January 2015 to December 2018 were retrospectively analyzed, and 462 non-tumor patients who underwent routine physical examination at Xinzhou People's Hospital of Shanxi Province during the same period were selected as control group. The occurrence of MetS and the correlation of MetS with clinicopathological characteristics and overall survival of patients with gastric cancer were analyzed.Results:The incidence rate of MetS in 245 patients with gastric cancer was 21.6% (53/245) and 13.6% (63/462) in the control group, and the difference between the two was statistically significant ( χ2 = 7.464, P = 0.008). Among patients with gastric cancer, the incidence of postoperative lung infection in the MetS group and non-MetS group was 17.0% (9/245) and 3.1% (6/462), respectively, and the difference was statistically significant ( χ2 = 13.874, P = 0.001); there was no significant difference in the tumor site and the incidence of incision infection, abdominal cavity infection, anastomotic leakage, gastric emptying disorder, and overall survival between the two groups (all P > 0.05). In patients with gastric cancer, MetS was associated with poor histological differentiation and late TNM stage ( χ2 = 4.242, P = 0.040; χ2 = 5.547, P = 0.027). Conclusions:The incidence of MetS in patients with gastric cancer is higher than that in the general population, and MetS-related abnormalities are more common in patients with low differentiated, undifferentiated and advanced gastric cancer. MetS may play a role in the occurrence and development of gastric cancer.

Purpose To investigate the corr-elation between Rap1 GAP expression in colon cancer tissues and clinicopatho-logical features and prognosis.Methods Immunohistochemistry was used to detect Rap1 GAP protein expression in 125 cases of colon cancer,and its correlation with clinicopathological features and prognosis was analyzed.Rap1 GAP protein expression in co-lon cancer LOVO,HCT116,SW480 cells and normal colon epi-thelial HCoEPiC cells was detected by Western blot.The expres-sion of Rap1 GAP was down-regulated and up-regulated in LO-VO,HCT116 and SW480 cells by lentivirus transfection,and di-vided into no-load group(sh-NON,LV-NON),sh-Rap1 GAP group(low expression Rap1 GAP)and LV-Rap1 GAP group(overexpression Rap1 GAP)according to different treatments.The transfection efficiency was verified by Western blotting.MTT assay and Transwell assay were used to detect cell proliferation,invasion and migration in each group.Results In 125 colon cancer samples,83 cases(66.4％)had the loss of Rap1 GAP expression,which was higher than that in paracancer control(7.2％,P＜0.001).The rate of loss of Rap1 GAP expression was correlated with the degree of tumor differentiation(x2=6.152,P=0.011)and the presence of mucinous adenocarcino-ma(x2=4.908,P=0.028),but not with gender,age,tumor location,tumor stage,or lymph node metastasis(P＞0.05).Western blotting results showed that compared with HCoEPiC(0.189±0.081)cells,Rap1 GAP protein expression was in-creased in colon cancer LOVO(0.238±0.008)cells.Rap1 GAP protein expression was decreased in HCT116(0.064± 0.002)and SW480(0.152±0.026)cells(F=159.6,P＜0.05).After LOVO cells were transfected with Rap1 GAP low expression lentivirus,the expression level of Rap1 GAP in sh-Rap1 GAP-1 group(0.733±0.071)and sh-Rap1 GAP-2 group(0.559±0.136)and sh-Rap1 GAP-3 group(0.606±0.037)was significantly lower than that in LOVO group(1.880± 0.129)(F=49.57,P＜0.05).Compared with sh-NON(1.260±0.109)group,the proliferation ability of sh-Rap1 GAP-2(1.569±0.059)and sh-Rap1 GAP-3(1.548±0.087)cells was significantly increased at 72 h(F=28.36,P＜0.05).Its invasion and migration ability were significantly increased(P＜0.05).After HCT116 cells transfected with overexpression lentivirus,the expression of Rap1 GAP protein in LV-Rap1 GAP group(1.395±0.137)was relatively higher than that in LV-NON group(0.485±0.097)(P＜0.05).The results of MTT assay showed that compared with LV-NON(0.652±0.047)group,the proliferation ability of cells in LV-Rap1 GAP(1.212 ±0.038)group was decreased,and the invasion and migration ability were significantly decreased(P＜0.05).The transfection results,proliferation,invasion and migration of SW480 cells were consistent with those of HCT116 cells.Conclusion The loss rate of Rap1 GAP expression is related to the differentiation degree of colon cancer and whether it is accompanied by mucin-ous adenocarcinoma.The up-regulation of Rap1 GAP expression can inhibit the proliferation,invasion and migration of colon cancer cells,providing a theoretical basis for exploring the occur-rence and development of colon cancer.

Objective To investigate the cognition and attitude about human papillomavirus (HPV) and HPV vaccines among nurses, so as to provide a certain basis for the popularization of HPV vaccine. Methods A self-designed questionnaire was used to survey the cognition and attitude about HPV and its vaccine among nurses in Zhejiang Cancer Hospital by a professional platform named "Wenjuanxing" from August to September 2017. A total of 206 questionnaires were collected.Results Among 206 nurses, 98.5％ of the nurses had heard of HPV, only 14.1％ knew HPV could spread through touching and 41.3％ knew that HPV infection can be self subsided. 90.3％ of the nurses had heard of HPV vaccine. 78.6％ of the nurses would like to take HPV vaccine, and 70.2％ of the nurses agreed their daughters to take HPV vaccine. Over 60％ nurses worried about the safety and efficacy of HPV vaccine.Conclusions Nurses have some knowledge about HPV and HPV vaccine, but it is not comprehensive enough. The government should strengthen the publicity of knowledge about HPV and HPV vaccine.