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Objective:To construct an index system for evaluating the development of research-oriented disciplines in medical institutions, and to provide a basis for guiding the superior disciplines towards international high-level disciplines.Methods:Through literature research and expert discussions, the basic framework of the research-oriented disciplines development evaluation system was established. The final version of the index system was determined using the Delphi method and expert interviews, and the weights of each index were established using the hierarchical analysis method.Results:After consultation, the framework of 5 first-class indexes, 16 second-class indexes, and 51 third-class indexes was finally constructed for the evaluation system of research-oriented discipline development, and the weights of indexes at different classes were calculated. The high-frequency terms " research mechanism construction" , " research team construction" and " representative research results" extracted from the expert interviews echoed the results of the weighting calculation.Conclusions:The evaluation system for research-oriented disciplines constructed in this study is relatively reasonable, scientific, reliable, and operable. The construction of the index system adapts to the characteristics of the development of research-oriented disciplines, with guiding significance for enhancing the development of research-oriented disciplines.
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Objective To compare the efficacy of different concentrations of pyruvate-based peritoneal dialysis solution for peritoneal resuscitation in a rat model of hemorrhagic shock.Methods Forty SPF healthy male Sprague-Dawley rats,weighing 200-250 g,were assigned to 4 groups (n=10 each) using a random number table method:sham operation group (S group),routine Ⅳ resuscitation group (VR group),and intraperitoneal resuscitation with different concentrations of pyruvate-based peritoneal dialysis solution groups (PY1 group,PY2 group).The animals were anesthetized with pentobarbital sodium 400 mg/kg.Hemorrhagic shock was induced by withdrawing blood from the left femoral artery until mean arterial pressure (MAP) was reduced to 30-40 mmHg and maintained for 60 min,and the animals were then resuscitated by infusion of shed blood.In VR group,hemorrhagic shock was resuscitated by retransfusion of autologous blood and with normal saline 2 times the volume of blood loss at 1 h after hemorrhagic shock.Routine Ⅳ resuscitation was performed,and 40 and 80 mmol/L peritoneal dialysis solution 20 ml were intraperitoneally infused for 30 min at the same time in PY1 and PY2 groups,respectively.MAP was recorded before blood-letting (T0),at 5,30 and 60 min of shock (T1-3) and 5,30,60,90 and 120 min after the end of resuscitation (T4-8).Blood samples were collected at T8 for blood gas analysis,and pH value,partial pressure of oxygen (PaO2),partial pressure of carbon dioxide (PaCO2),base excess (BE),and bicarbonate ion concentration (HCO3-) were recorded.Results Compared with S group,MAP was significantly decreased at T1-8 in VR and PY1 groups and at T1-7 in PY2 group,and pH value,PaO2,BE and HCO3-were significantly decreased,and PaCO2 was increased in VR group (P＜0.05).Compared with VR group,MAP at T4-8,pH value,PaO2,BE and HCO3-were significantly increased,and PaCO2 was decreased in PY1 and PY2 groups (P＜0.05).Compared with PY1 group,MAP at T6-8 and pH value were significantly increased (P＜0.05),and no significant change was found in PaO2,PaCO2,BE or HCO3-in PY2 group (P＞0.05).Conclusion Peritoneal resuscitation with 80 mmol/L pyruvate-based peritoneal dialysis solution produces better efficacy than 40 mmol/L in a rat model of hemorrhagic shock.
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Objective To evaluate the effect of pyruvate peritoneal resuscitation on Janus kinase (JAK) /signal transducer and activator of transcription (STAT) signaling pathway in intestinal tissues of rats with hemorrhagic shock.Methods Twenty-four healthy male Sprague-Dawley rats,weighing 200-300 g,were divided into 3 groups (n=8 each) using a random number table method:sham operation group (S group),intravenous resuscitation group (VR group),and peritoneal resuscitation with pyruvate group (PY group).Hemorrhagic shock was induced by blood-letting and infusing blood withdrawn with mean arterial pressure reduced to 30-40 mmHg for 60 min in pentobarbital-anesthetized rats.Hemorrhagic shock was resuscitated with autologous blood and normal saline 2 times the volume of blood withdrawn at the end of hemorrhagic shock in group VR.Pyruvate was intraperitoneally infused for 30 min using a micro-perfusion pump simultaneously with the intravenous resuscitation in group PY.The animals were sacrificed at 2 h after resuscitation,and intestinal tissues were obtained for determination of malondialdehyde (MDA) content (by thiobarbituric acid method),superoxide dismutase (SOD) activity (using xanthine oxidase method),myeloperoxidase (MPO) activity (using chemical colorimetry),and expression of phosphorylated STAT3 (pSTAT3),phosphorylated JAK2 (p-JAK2) and caspase-3 expression (by Western blot).Results Compared with group S,the MDA content and MPO activity were significantly increased,the SOD activity was decreased,and the expression of p-STAT3,p-JAK2 and caspase-3 was up-regulated in the other two groups (P＜0.05).Compared with group VR,the MDA content and MPO activity were significantly decreased,the SOD activity was increased,and the expression of p-STAT3,p-JAK2 and caspase-3 was down-regulated in group PY (P＜0.05).Conclusion The mechanism by which peritoneal resuscitation with pyruvate mitigates intestinal damage may be related to inhibiting activation of JAK/STAT signaling pathway in the rats with hemorrhagic shock.
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Objective To evaluate the effect of peritoneal resuscitation (PR) with pyruvate-based peritoneal dialysis solution (PDS) on liver injury in a rat model of hemorrhagic shock.Methods Fifty healthy male Sprague-Dawley rats,weighing 200-250 g,were used in this study.The animals were anesthetized with pentobarbital sodium,tracheostomized and mechanically ventilated.Hemorrhagic shock was induced by withdrawing blood from the left femoral artery at a rate of 0.6 ml/min within 10 min until mean arterial pressure (MAP) was reduced to 30-40 mmHg which was maintained for 60 min.The animals were divided into 5 groups (n =10 each) using a random number table:sham operation group (group SH),conventional Ⅳ resuscitation group (group CVR),PR with normal saline group (group NS),PR with lactate-based PDS group (group LA) and PR with pyruvate-based PDS group (group PY).The animals only underwent surgical procedure in gronp SH.In group CVR,the animals were resuscitated with infusion of the blood withdrawn and normal saline (the volume was 2 times volume of blood loss) via the right femoral artery after successful establishment of hemorrhagic shock.In NS,LA and PY groups,conventional resuscitation was performed,and the animals were simultaneously resuscitated with normal saline,2.5％ glucose-based PDS containing lactate,and 2.5％ glucose-based PDS containing pyruvate 20 ml,respectively.The blood withdrawn and fluid for resuscitation were all infused over 30 min.MAP was recorded before blood letting,at 5,30 and 60 min of shock and at 5,30,60,90 and 120 min after the end of resuscitation.The arterial blood lactate level was measured by chemical colorimetry at 120 min after the end of resuscitation.The animals were then sacrificed and livers were removed for examination of the pathological changes with a light microscope.The damage to livers was assessed and scored.Results Compared with MAP before blood letting,MAP was significantly decreased during hemorrhagic shock and increased at each time point after resuscitation in CVR,NS,LA and PY groups (P＜0.05).Compared with group SH,MAP during hemorrhagic shock and at each time point after resuscitation was significantly decreased,and the arterial blood lactate level and liver damage scores were increased in CVR,NS,LA and PY groups (P＜0.05).Compared with CVR and NS groups,the arterial blood lactate level and liver damage scores were significantly decreased in LA and PY groups (P＜0.05).There was no significant difference in the arterial blood lactate level or liver damage scores between group CVR and group NS (P＞0.05).Compared with group LA,the arterial blood lactate level and liver damage scores were significantly decreased in group PY (P＜0.05).Conclusion PR with pyruvate-based PDS can reduce liver injury in a rat model of hemorrhagic shock.
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Objective To evaluate the clinical characteristics,pathology,treatment and prognosis of gastrointestinal stromal tumors.Methods A retrospective analysis was made on clinical data of 469 patients with gastrointestinal stromal tumors (GIST) admitted between January 2010 and August 2016.Results There were 231 males and 238 females,the median age was 57 years old.The tumor was located in the esophagus in 6 cases (1.3％),in the stomach in 295 cases (62.9％),in the duodenum in 23 cases (4.9％),in the small intestine in 69 cases(14.7％),in the colorectum in 26 cases (5.5％).There were altogether 50 cases (10.6％) in this group with a final diagnosis of extra-gastrointestinal stromal tumors.Tumor invasion depth,risk of ulcer caused bleeding and NIH classification varied with its locations (all P ＜ 0.05).Conclusions The clinical characteristics of gastrointestinal stromal tumors can be used to preliminarily predict its malignant degree.Surgical resection is the treatment of choice,and postoperative recurrence or metastases of gastrointestinal stromal tumors can be treated by imatinib.
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Objective To evaluate systematically the long-term efficacy and prognostic factors of surgical treatment for gastric carcinoma with liver metastases (GCLM).Methods Database including Chinese Journal Full Text Database,Wan Fang Database,VIP database,Chinese Database of Literature on Biomedicine,Pubmed,EMBASE,Cochrane Library,Medline,Springerlink and Wiley Online Library were searched with“胃癌,胃月中瘤,肝转移,手术治疗,外科手术,肝切除术,生存率,预后因素,gastric cancer,gastric carcinoma,hepatic,resection,hepatic resection,hepatectomy,liver metastases,hepatic metastases,surgery,surgical,survival,prognostic factors.The time for retrieving was from January 1995 to August 2015.Literatures on longterm efficacy and prognostic factors of radical resection of gastric carcinoma combined with hepatectomy for GCLM were retrieved,and data were analyzed and evaluated by 2 independent researchers.The count data were presented by the relative risk (RR) and 95％ confidence interval (95％ CI).The group rate was merged by the formula RR/(1 + RR),corresponding 95％ CI upper limit values were transferred by the formula RR/(1 + upper limit value RR),and the lower limit values were transferred by the formula RR/(1 + lower limit value RR).The comparison of group rates was done by indirect comparison,Z =difference between group rate/√∑ni=1 (standard error of group rate)2.The heterogeneity was analyzed by I2.Results Eighteen literatures of cross-sectional studies were retrieved and the total sample size was 410 patients.The results of Meta analysis:(1) the summary RR of 3-year overall survival of surgical patients with GCLM was 0.47 (95％ CI:0.37-0.60) while the summary 3-year overall survival rate was 32.0％ (95 ％ CI:0.27-0.38).(2) The summary RR of 5-year overall survival of surgical patients with GCLM was 0.35 (95％ CI:0.27-0.45),summary RR of 5-year overall survival rate was 25.9％ (95％ CI:0.21-0.31).(3)The summary RR of overall recurrence of surgical patients with GCLM was 2.95 (95％CI:2.23-3.88) while the summary overall recurrence rate was 74.7％ (95％CI:0.69-0.80).(4)The summary RR of remnant liver recurrence of surgical patients with GCLM was 1.39 (95％ CI:0.91-2.15) while the summary RR of remnant liver recurrence rate was 58.2％ (95％ CI:0.48-0.68).(5)The summary 3-year survival rate of surgical patients with GCLM and primary carcinoma serosal invasion was 32.9％ (95％ CI:0.23-0.44),and summary 5-year survival rate was 25.9％ (95％ CI:0.16-0.40).The summary 3-year survival rate of surgical patients with GCLM and without primary carcinoma serosal invasion was 47.9％ (95％ CI:0.38-0.58),and summary 5-year survival rate was 38.3％ (95％ CI:0.29-0.49).The summary 3-year survival rate of surgical patients with synchronous hepatic metastases was 30.6％ (95 ％ CI:0.24-0.38),and summary 5-year survival rate was 24.2％ (95％ CI:0.18-0.32).The summary 3-year survival rate of surgical patients with metachronous hepatic metastases was 40.1％ (95％ CI:0.32 0.48),and summary 5-year survival rate was 32.9％ (95％ CI:0.25-0.41).The summary 3-year survival rate of surgical patients with solitary metastatic hepatic carcinoma was 47.6％ (95％ CI:0.40-0.56),and summary 5-year survival rate was 37.1％ (95 ％ CI:0.26-0.48).The summary 3-year survival rate of surgical patients with multiple metastatic hepatic carcinoma was 28.6％ (95％ CI:0.18-0.42),and summary 5-year survival rate was 15.3％ (95％ CI:0.07-0.30).The summary 3-year survival rate of surgical patients with GCLM and R0 resection was 28.6％ (95 ％ CI:0.19-0.40),and summary 5-year survival rate was 20.0％ (95％ CI:0.12-0.32).The summary 3-year survival rate of surgical patients with GCLM and without R0 resection was 0.0,and summary 5-year survival rate was 9.1％ (95 ％ CI:0.03-0.25).The summary 3-year survival rate of surgical patients with GCLM and resection margin ＜ 10 mm was 13.0％ (95 ％ CI:0.05-0.30),and summary 5-year survival rate was 8.3 ％ (95 ％ CI:0.02-0.28).The summary 3-year survival rate of surgical patients with GCLM and resection margin ≥ 10 mm was 34.6％ (95 ％ CI:0.21-0.52),and summary 5-year survival rate was 34.6％ (95％ CI:0.21-0.52).The summary 3-year survival rate of surgical patients with GCLM and chemotherapy was 45.9％ (95％ CI:0.29-0.64),and summary 5-year survival rate was 29.1％ (95 ％ CI:0.19-0.42).The summary 3-year survival rate of surgical patients with GCLM and without chemotherapy was 38.7％ (95 ％ CI:0.26-0.53),and the summary 5-year survival rate was 25.4％ (95％ CI:0.18-0.35).The 3-year survival rate of surgical patients without primary carcinoma serosal invasion and with metachronous hepatic metastases,solitary metastatic hepatic carcinoma,R0 resection and resection margin ≥10 mm was statistically significantly higher than that of surgical patients with primary carcinoma serosal invasion,synchronous hepatic metastases,multiple metastatic hepatic carcinoma and resection margin ＜ 10 mm and without R0 resection (Z =2.118,1.999,3.01 8,5.295,2.183,P ＜ 0.05).The 5-year survival rate of surgical patients with solitary metastatic hepatic carcinoma and resection margin ≥ 10 mm was statistically significantly higher than that of surgical patients with multiple metastatic hepatic carcinoma and resection margin ＜ 10 mm (Z =4.528,2.819,P ＜ 0.05).Conclusion Overall long-term efficacy of surgical patients with GCLM is not good enough,and there is the better prognosis in the surgical patients without primary carcinoma serosal invasion and with metachronous hepatic metastases,solitary metastatic hepatic carcinoma,R0 resection and resection margin≥ 10 mm.
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Ulcerative colitis( UC)is a disease difficult to cure and easy to relapse. Although the pathogenic and recurrent factors for UC are not clear,dietary factors are thought to be associated with both of them and becoming the hot topic of UC-related studies. Traditionally,dietary fiber is considered beneficial to UC,however,some of the latest overseas studies raised doubts about it. In this article,the dietary fiber and its role in UC were reviewed.
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Objective To investigate the effect of 1-MT in combination with 5-FU on the number of myeloid-derived supressor cells (MDSC) in gastric carcinoma beating mice.Methods By using the lipofectamine TM 2000,the eukaryotic expression plasmid pcDNA3.1-IDO and empty vector pcDNA3.1 (+) were transfected in a MFC cell line.Animal model of gastric cancer bearing 615 mice were established to give respectively normal saline (NS),1-MT,5-FU and 1-MT + 5-FU therapy.Flow cytometry and immunofluorescence were used to analyze MDSC expression in tumor tissue.Result (1) The expression of MDSC was detected in transplanted tumor.(2)The expression of MDSC in gastric cancer beating 615 mice (49.8％ ± 1.1％) was higher than the normal group (1.2％ ± 0.3％) (P ＜ 0.05).(3) Compared with normal group the MDSC expression in 1-MT + 5-FU group (18.5 ％ ± 0.5 ％) decreased significantly (P ＜ 0.05).Conclusions Combining 1-MT with 5-FU can reduce the number of MDSC in gastric cancer bearing 615 mice,improving tumor microenvironment.
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ObjectiveTo investigate the inhibitory effect of 1-methyl-tryptophan (1-MT) on transplanted hepatocellular carcinoma in mice.MethodsHuman hepatocellular carcinoma subcutaneous tumor models were established in mice,and the mice were divided into hepG2 group,empty plasmid group,indoleamine 2,3-dioxygenase (IDO) saline group,IDO) 5-fluoropyrimidine (5-FU) group,IDO 1-MT group,and the group combining IDO 1-MT with 5-FU treatment (n=8 in each group).The tumor growth,tumor volume and pathological examination were observed and the expression of IDO in tumor tissues was determined by immunohistochemistry.ResultsCompared with hepG2 and the empty vector saline groups,IDO saline group had bigger tumor,faster growth,and the differences were statistically significant (P＜0.05).Compared with IDO saline group,5-FU group,1-MT group and combination treatment groups showed smaller tumor volume and weight,and the tumor inhibitory rates were 86.54％,79.95％,94.46％,respectively.There were significant differences between these groups (P＜0.05).However,there were no significant differences in tumor volumes between 5-FU group and 1-MT group (P＞0.05).HE pathological observation of ceils in each treatment group showed reduced density,increased necrotic area and significant decrease in peripheral blood alpha-fetoprotein (P＜0.05).ConclusionsIDO can promote the growth of liver cancer cells involved in immune escape.1-MT can inhibit the transplanted tumor growth in mice,and therefore may enhance the chemotherapeutic efficacy.
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Objective To investigate the expression and possible function of tumor susceptibility gene 101 (TSG101) in multidrug-resistant cell lines of gastric cancer.Methods The expression of TSG101 was examined in gastric cancer cell line SGC7901 and its vincristine(VCR)-resistant subline SGC7901/VCR with semi -quantitative RT-PCR and Western blot. TSG101 eukaryotic expression vector was transfected into SGC7901 cells by lipofectamine TM 2000. The expression levels of TSG101 in SGC7901 and the transfectants were detected with Western blot. Fluorescence-activated cell sorting was applied to examine the cell cycle alteration and the intracellular mean fluorescence intensity of adriamycin (ADR). Growth curve and drug sensitivity of cells to VCR and ADR were analyzed by MTT assay.Results TSG101 was highly expressed in VCR resistant gastric cancer cells. The expression of TSG101 in TSG101 transfectants was up-regulated compared with that in SGC7901 transfected with empty vector or in SGC7901 cells. TSG101 transfectants were accumulated in S phase, with a concomitant decrease of cell population in G 1 phase. MTT assay showed that TSG101 transfectants proliferated rapidly and were more resistant to VCR and ADR than control cells. Conclusions The over-expression of TSG101 could promote the multidrug resistance phenotype of sGC7901 cells. TSG101 may play a certain role in multidrug resistance of gastric cancer.
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Objective: To study the effect of ?- carotene(?-C) on lipid peroxidation and RBC-membrane fluidity of rats inflicted with alloxan. Methods: Forty-four 2mo-old Wistar rats were randomly divided into 4 groups and fed with basal diet (group A and B), basal diet + vitamin E (200 mg/kg) (C) and basal diet+? carotene (200 mg/kg) (D) for 4 w respectively. Then, alloxon (3%) was injected intraperitoneally except group A, which was injected with normal saline. After 48 h the rats were killed and a series of indices were examined. Results: After injected with alloxan, Na +,K +-ATPase and GSH-Px activity, RBC-membrane fluidity in rats fed with diets C,D were markedly increased while MDA levels were decreased. Conclusion: ?-C and V E can decrease lipid peroxidation and increase the stability of RBC-membrane in rats inflicted with alloxan.