Objective To establish a human colon cancer multi-drug resistant cell line LS174T/5-fluorouracil(5-Fu) and to explore its biological characteristics. Methods A resistant human colon cancer line LS174T/5-Fu was established by stepwise increasing concentrations of fluorouracil selection from the parental cell line LS174T.Drug sensitivity was detected by MTT assay,and the changes of biological characteristics were determined by light microscopy,cell counting,flow cytometry and RT-PCR. Results LS174T/5-Fu cell line was developed after 6 months with stable resistance to 5-Fu and a resistance index of 40.24.The cells exhibited cross-resistance to cisplatin,etoposide,doxifluridine and hydeoxycamptothecin.LS174T/5-Fu cells grew more slowly than LS174T cells,which was longer than LS174T cell line.Cell cycle distribution of LS174T/5-Fu cells was changed compared with parental cells.The percentage of cells in G_(1) and S phase was increased,while in G_(2) phase was decreased.The level of MRP mRNA expression was increased according to the concentration of 5-Fu in resistant cell lines. Conclusion LS174T/5-Fu cells is a reliable multi-drug resistant cell subline of human colon cancer.The successful establishment of this cell subline has laid a solid foundation for further study of the multi-drug resistant mechanism of human colon cancer induced by 5-fluorouracil.

Objective To study the expression level of myostatin in the gastrocnemius muscle of cancer cachexia mice and to observe the improvement of the status and the influence on myostatin expression by use of meloxicam.(Methods The) tumor-bearing cachexia mice model was established by Lovo cell line subcutaneous inoculation.Twenty-four BALB/c mice were randomly divided into 3 groups(n=8 for each group):group A,control;group B,tumor-bearing mice plus saline;group C,tumor-bearing mice plus meloxicam(5 mg/kg).The food intake and body composition were documented.The expression of myostatin in the gastrocnemius muscle was investigated by RT-PCR and immunohistochemistry in all the animals,and the correlation analysis between serum TNF? and myostatin was conducted. Results The body weight of group B was about 60% of group A,and the average food intake was significantly declined(P

[Summary] Diabetic nephropathy is one of the major chronic microvascular complications of diabetes ,which is the leading cause of end‐stage renal disease ,as well as the main cause of death in diabetic patients. Glomerular endothelial cell is an important component of the glomerular filtration barrier ,which is directly related to the materials of circulation ,and it can be easily damaged by glucose ,lipid and inflammatory factors. Under the hyperglycemia ,the PKC pathway ,the polyol pathway and oxidative stress were activated ,producing an excess of advanced glycation end products and reactive oxygen species ,which damage the endothelial nitric oxide synthase ,reduce the generation of nitric oxide ,while produce a large number of Ang Ⅱ. Ang Ⅱ damage the endothelial cell. In addition ,there are crosstalk between glomerular endothelial cells and endothelial cells ,which also cause endothelial cell injury. Here ,we reviewed the role of endothelial cell injury in the pathogenesis of diabetic nephropathy.

To study the misdiagnostic reasons of valua Bowenoid papulosis. MethodTwenty-two cases of Bowenoid papulosis were retrospectively analysed. ResultsSeven cases were diagnosed as vulua Bowen's disease, 10 cases cindyloma acuminatum, 2 cases malignant melanoma and 3 cases melanocytic nevus. ConclusionsThe presence of mild to severe cytological atypia is a feature of Bowenoid papulosis. The diagnosis should be made according to both clinical and pathologic features. The disease may be spontaneously regressed.

Objective To investigate the effect of the Kolb experience learning theory applied in Surgical Nursing teaching.Methods 120 students were selected randomly and were divided into 2 groups,the observation group operated the teaching mode based on the Kolb experience learning theory,the control group operated traditional teaching.After the experiment,using the theory test,the skill test,the questionnaire survey to evaluate the teaching effectiveness.Results The two groups showed statistical difference in theory exam results,learning effect of each dimension and evaluation of teaching effect.Conclusions The teaching mode based on the Kolb experience learning theory can improve the students' interest in learning and study effect,and push forward the reform of teaching implementatiou.

Norovirus ; chemistry ; Receptors, Virus ; physiology ; Viral Structural Proteins ; chemistry ; immunology ; Viral Vaccines ; immunology

Objective To assess the relationship of serum prealbumin level with the severity of acute ischemic stroke (AIS).Methods The clinical data of 2522 AIS patients who were admitted in Peking Union Medical College Hospital from 2000 to 2008 were retrospectively analyzed.The serum prealbumin and hypersensitive C-reactive protein (hs-CRP) levels were evaluated by immunoturbidimetric assay within 24 hours after admission.The AIS severity was evaluated at admission using modified Rankin Scale (mRS).Patients were divided into mild AIS group (mRS score ≤ 3 ) and severe AIS group (mRS score ＞ 3 ).The levels of serum prealbumin and hs-CRP were compared between these two groups,and the relationship between praalbumin and hs-CRP was also analyzed.Results There were 1697 patients in the mild group (average mRS score:1.67) and 825 patients in the severe group ( average mRS score:4.53 ).The severe group had significantly lower prealbumin level [ ( 191.20,82.00)versus (219.18,72.00) mg/L,P =0.000] and higher hs-CRP level [ (6.01,8.22) versus (4.15,6.93) mg/L,P =0.000 ] than the mild group,respectively.Partial regression analysis showed that the stroke severity was negatively correlated with serum prealbumin level (r =-0.115,P =0.000) and positively correlated with hs-CRP level (r =0.098,P =0.000).Serum prealbumin level was inversely correlated with hs-CRP level ( r =- 0.396,P =0.000).Conclusion The prealbumin level is relevant with the severity of AIS and inflammation.

Objective Percheron artery is an uncommon anatomic variant. Percheron artery infarction with unilateral embryonic posterior cerebral artery ( PCA ) was rarely reported.The aim of this study was to characterize the clinical and imaging patterns of Percheron artery infarction with the unilateral embryonic PCA for early diagnosis and treatment.MethodsClinical and imaging data of 2 patients with Percheron artery infarction were reviewed retrospectively.ResultsTwo patients presented acute coma and one had paroxysmal blurred before coma.On neurological examinations,one patient had vertical gaze palsy besides two were unconsciousness. MRI showed symmetrical high signal intensity on diffusion weighed imaging (DWI)in bilateral paramedian thalami in two patients and a distinct pattern of V-shaped hyperintensity on DWI andFLAIR was present on the midbrain in one patient. Digital subtraction angiography and magnetic resonance angiography demonstrated unilateral embryonic PCA in two patients.ConclusionsThe classical clinical symptoms,symmetrical high signal in bilateral paramedian thalami and V-shaped sign in midbrain on DWI can improve recognition,evaluation and management of Percheron artery infarction.The unilateral embryonic PCA may be underlying risk factor of Percheron artery infarction.

Objective:To explore the clinical efficacy of radical resection for lung metastasis from colorectal cancer and the prognostic factors.Methods:The retrospective cohort study was conducted. The clinicopathological data of 63 colorectal cancer patients with lung metastasis who were admitted to Peking University Cancer Hospital from January 2004 to December 2015 were collected. There were 35 males and 28 females, aged (57±12)years. Patients underwent radical resection for primary lesion and lung metastasis from colorectal cancer. Observation indicators: (1) diagnosis and treatment; (2) follow-up and survival; (3) prognostic factors analysis. Follow-up was conducte by outpatient examination and telephone interview to detect the survival of patients after operation up to December 2018. Measurement data with normal distribution were represented as Mean±SD, and measurement data with skewed distribution were represented as M (range). Count data were described as absolute numbers or percentages. The Kaplan-Meier method was used to calculate survival rates and draw survival curves. Log-rank test was used for univariate analysis and COX proportional hazard model was used for multivariate analysis. Results:(1) Diagnosis and treatment: of 63 patients with lung metastasis from colorectal cancer, 6 had synchronous lung metastasis and 57 had metachronous lung metastasis. Eighteen cases of suspected lung metastasis were initially detected by chest X-ray, and further confirmed by computed tomography (CT). Forty-five cases of suspected lung metastasis were initially detected by chest CT. All the 63 patients underwent radical resection for primary and metastatic lesions. Two of 22 cases undergoing mediastinal lymph nodes dissection were detected one positive lymph node, respectively. All patients recovered well after operation, without severe complications. There were 57 of 63 patients receiving more than 6 months of postoperative adjuvant chemotherapy and targeted therapy based on fluorouracils. (2) Follow-up and survival: 63 patients were followed up for 8-143 months, with a median follow-up time of 58 months. During the follow-up, 19 of 63 patients died, 24 patients had secondary recurrence with a 5-year recurrence rate of 38.1%(24/63) and a recurrence interval of 18 months(range, 3-58 months). Of 24 patients with secondary recurrence, 19 had lung metastasis, 3 had brain metastasis, 2 had bone metastasis, 2 had liver metastasis; some patients had multiple metastases. Of 24 patients with secondary recurrence, 5 underwent reoperation and 19 underwent chemotherapy and radiochemotherapy. The 5-year overall survival rate of 63 patients was 62.7%. (3) Prognostic factors analysis: results of univariate analysis showed that location of primary lesion, the number of lung metastases and carcinoembryonic antigen (CEA) level before resection of lung metastasis were related factors for prognosis of patients with lung metastasis from colorectal cancer ( χ2=4.162, 7.175, 6.725, P<0.05). Results of multivariate analysis showed that the number of lung metastases and CEA level before resection of lung metastasis were independent influencing factors for prognosis of patients with lung metastasis from colorectal cancer ( hazard ratio=2.725, 2.778, 95% confidence interval as 1.051-7.064, 1.072-7.021, P<0.05). Conclusions:Radical resection for lung metastasis from colorectal cancer is safe and feasible. The number of lung metastases and CEA level before resection for lung metastasis are independent influencing factors for prognosis of patients with lung metastasis from colorectal cancer.

Objective To investigate current situation of prescription of traditional Chinese medicine (TCM) for acute stroke patients.Methods From June 2008 to October 2010,with simple cluster sampling,48 centers were randomly assigned to the intervention group receiving a standardized treatment strategy,and the usual care group without specific recommendations for treatment.No specific recommendations or restrictions of TCM were proposed for both groups.Consecutive hospitalized patients with acute ischemic stroke were recruited in this study.Clinical data and treatment strategy (including TCM) were recorded by trained investigators.The prescription of TCM three months prior to admission and at discharge was recorded and analyzed.The chi-square test was used for analysis of qualitative data.Results Totally 3 664 patients were included in the analysis (1 709 patients in standard care group and 1 955 patients in the usual care group) with male to female ratio 2∶ 1.The difference of distribution of age,sex and education level between the two groups was not statistically significant.One hundred and eighty-seven patients (5.10％) had taken TCM three months prior to admission,81.28％ of them only taking one type of TCM,without significant difference between the two groups.The percentage of patients taking TCM at discharge was significantly increased to 30.65％ for all the patients with higher percentage (38.16％) in the usual care group than that in the standard care group (22.06％).The percentage of using more than one type of TCM was also higher in the usual care group (x2 =141.43,P ＜ 0.01).Totally,112 types of TCM were prescribed at discharge.Conclusions Nearly one third of hospitalized patients with acute stroke were prescribed TCM at discharge,with mostly monotherapy and a great variety.