Malignant colon cells require angiogenesis and optimal tumor microenvironment for proliferation, invasion and metastasis. The non-receptor tyrosine kinase signal transducer and activator of transcription (JAK-STAT) pathway are involved in multiple processes, including chronic inflammation-associated tumorigenesis, cancer proliferation, tumor angiogenesis, immune evasion and facilitating tumor metastasis, making JAK-STAT a new target in molecular target therapy. In this review, advances on JAK-STAT pathway as a new target in colon tumorigenesis are updated, and a preliminary estimation of JAK-STAT in prognosis and target therapy will be mentioned to show a potential future of JAK-STAT in colon cancer.

Tacrolimus is a newtype immunodepressant and used after organ transplantation extensively. It has beed reported tacrolimus may injure intestinal barrier function but the mechanism was ambiguous.

Objective: To explore and modify the isolation method for mouse intestinal intraepithelial lymphocytes. Methods: Epithelium mucosae of mouse small intestine was incubated in iced bath and shaked in PBS containing DTT. The cell suspension was obtained after filtration with 80 and 400- screen mesh trap valve in turn. The yield, viability and purity of intestinal intraepithelial lymphocytes were observed to estimate the feasibility. Results: About (5.6±0.7)×10～6 intestinal intraepithelial lymphocytes were obtained from every 20cm samll intestine. The viabilty of intestinal intraepithelial lymphocytes was (90.46±5.71)% and the purity was (92.21±5.20)%. Conclusion: Compared with other reported isolation methods, the modifled method is convenient and esay to handling.The yield, viability and purity are high enough to be used for intestinal intraepithelial lymphocytes studies.

Objective: To explore the clinicopathological features and prognosis of mucinous tubular and spindle cell carcinoma (MTSCC) of the kidney in order to improve the understanding of the tumor. Methods: The clinical and pathological information of 15 patients with MTSCC in 7 hospitals were retrospectively collected and analyzed from July 2010 to July 2018. The sections were reviewed by two high-seniority pathologists. The EnVision two-step immunohistochemical staining technique was used to detect the expressions of villin, cytokeratin 7 (CK7), epithelial membrane antigen (EMA), alpha-methylacyl-CoA racemase (AMACR), transducin-like enhancer of split 1 (TLE1), hepatocyte nuclear factor-1p (HNF-1p)and kidney specific calcium binding protein (Ksp-cadherin). The fluorescence in situ hybridization (FISH) was used to detect the synovial sarcoma translocation (SYT)-synovial sarcoma X chromosome breakpoint (SSX) fusion gene in the patients with sarcomatoid changes and positive immunohistochemical staining of TLE1. Finally, the prognostic data of all patients and the relevant literature were reviewed. Results: Among 15 patients with MTSCC, seven of the patients were male and the other eight were female, with an average age of 62 years (ranging from 48 to 75 years). The tumors were found by chance in 12 patients during physical examination, and the other 3 patients developed clinical symptoms such as frequent urine pain or hematuria, including 1 patient with a history of renal calculi for 15 years. The cut surface of tumor is firm and grey or yellow. Except for 2 cases, the majority of tumors were well-circumscribed. Microscopically, 1 case showed neoplastic necrosis, 13 cases showed a mixture of mucinous stroma, tubules and spindle cells, 1 case was mainly composed of spindle cells and mucus, and 1 case was mainly composed of tubule and mucus. Some tumors were with obvious clear cytoplasmic changes, and two cases were accompanied by sarcomatoid differentiation. The immunohistochemical results showed that the positive rates of villin, CK7, EMA, AMACR, TLE1, HNF-1 p and Ksp-cadherin were 20.0% (3/15), 80.0% (12/15), 93.3% (14/15), 80.0% (12/15), 20.0% (3/15), 20.0% (3/15), 93.3% (14/15) and 13.3% (2/15), respectively; the result of FISH excluded synovial sarcoma. Eight patients were followed up wihout other treatment after operation. Bone metastasis occurred in half a year after operation in one patient with follow-up information, while no evidence of local recurrence or distant metastases was identified in the other 7 patients until now. Conclusion: A few cases of MTSCC can metastasize and belong to malignant tumors. The positive expressions of AMACR, CK7 and villin in some cases suggests that the tumor has both proximal and distal renal tubular origins. The positive expression of HNF-ip is correlated with the histological characteristics of MTSCC clear cytoplasm.

ObjectiveTo investigate the effectiveness and toxicity of CyberKnife in the treatment of lung metastases.MethodsTreatment details and outcomes were reviewed for 93 targets of 48 histologically verified patients treated by CyberKnife at the CyberKnife Center of Tianjin between September 2006 and June 2010.The median tumor volume was 6.0(0.2 - 135.2) cm3,the median biological equivalent dose was 140.8(53 - 180) cGy (α/β =10),the median fraction was 3(1-7) times and the median isodose line was 81％ (71％-91％ ).ResultsThe rate of follow-up is 96％.33 cases were followed up for more than 2years.The effective rate was 90.3％.Two targets of 2 patients locally progressed.The 1-and 2-year local control rates,overall survival (OS) rates and progression-free survival (PFS) rates were 98％ and 98％,83％ and 63％,and 64％ and 37％,respectively.Univariate analyses showed that age older than 60 versus ≤60 years tended to be predictor for PFS ( x2 =3.45,P =0.063 ) ;The PFS of patients who had single lesion was better than patients with multiple lesions ( x2 =4.49,P =0.034 ) ; patients with disease-free interval longer than 18 months had better OS ( x2 =6.50,P =0.011 ).Five patients were reported to experience treatment-related grade 1 radiation pulmonary injury,and one each for subcutaneous fibrosis with pigmentation,grade 2 and grade 3 adverse event.ConclusionsFor patients with lung metastatic lesion,CyberKnife is an effective option with high local control rate and little acute reaction.The long-term outcome and toxicity need further study.

Objective: To investigate the effect of bone marrow mesenchymal stem cells (MSC) on the variation of intestinal permeability damaged by superior mesenteric artery ischemia and reperfusion. Methods: Bone marrow mesenchymal stem cells were isolated from cavity of tibias and femurs of male Sprague Dawley rat in a sterile condition, and were cultured and proliferated in plastic dishes. 10 week old female Sprague Dawley rats were randomly divided into three groups:group A (sham group), group B (MSC group) and group C (saline group). In group B and group C, the superior mesenteric artery (SMA) of the animals were seperated and occluded by non-invasive vascular clamp for 45 minutes. Immediately after removing the vascular clamp,1×10~7 MSC suspended in 0.5 ml sterile L-DMEM and the same volume of normal saline was submucosally injected into the small intestine at ten different points in group B and group C, respectively. In group A, the animals were only underwent laparotomy without clamping the SMA. 3 days and 6 days after the operation, 100 mg lactulose and 50mg mannitol dissolved in 2 ml distilled water were administrated by oral gavage and urine during 6 h experiment was collected for assaying the L/M ratio before sacrificing the animals. The donor derived MSC was identified by Y chromosome in situ hybridization in ileum tissue, and the serum D-lactate level was determined. Results: The donor derived MSC could home to the ischemia/reperfusion injured intestinal mucosa, and the intestinal permeability was much lower in group B (MSC group) than that in group C (saline group)(P<0.05). Conclusion: Mesenchymal stem cells can reduce the small intestinal mucosal permeability impaired by ischemia/reperfusion, and can participate in the preservation of integrity of the damaged gut mucosal mechanical barrier.

Objective To evaluate clinical risk factors that can predict brain metastasis after complete resection of small cell lung cancer (SCLC) and to assess the role of prophylactic cranial irradiation (PCI) in such kind of patients.Methods Eighty-eight patients with completely resected stage Ⅰ - Ⅲ SCLC from Jan.2000 to Dec.2009 in our hospital were retrospectively analyzed.Kaplan-Meier was used to compare the differences in the incidence of metastasis free survival in different groups.Logistic model was used to assess the independent risk factors for brain metastasis.Results The follow-up rate is 100％,and 37 patients were followed up for more than three years.None of the 3 patients who received PCI developed brain metastasis,while for patients without receiving PCI,24％ developed brain metastases.The incidence of brain metastasis for stage Ⅰ,Ⅱ and Ⅲ SCLC after surgery were 4％,26％ and 29％ ( x2 =7.57,P =0.023),respectively.The median survival time and the 3-year survival rate were 18 months and 25％ for patients who developed brain metastasis,and 48 months and 59％ for those without brain metastasis ( x2 =10.63,P =0.001 ).Both univariate and multivariate analyses showed that pre-treatment disease stage wasindependent risk factor for brain metastasis ( x2 =7.57,8.52 ; P =0.023,0.004 ).Age,sex,tumor location,pathological type,induction chemotherapy,and postoperative chemotherapy/radiotherapy were not significantly correlated with the incidence of brain metastasis ( x2 =0.03,0.00,0.00,2.58,0.01,1.23,0.84;P =0.869,0.998,0.992,0.109,0.936,0.266,0.361,respectively).Conclusions Pre-treatment disease stage was independent risk factor for brain metastasis in SCLC.PCI may be important for stage Ⅱ -Ⅲ SCLC but not for stage Ⅰ disease.<英文关键词>=Carcinoma,small cell lung/surgery; Neoplasm metastasis,brain/prophylactic irradiation; Factors analysis

Visceral myopathy is a rare disorder characterized by atrophy,losing and fibrosis of visceral smooth muscle.Digestive tract is often invaded by the lesions,and the symptoms are various according to different lesions and degrees.Small intestinal involvement is characterized by abdominal distension,diarrhea and vomiting.Colon involvement is characterized by chronic intestinal pseudoobstruction.Malnutrition and hypoproteinemia may be secondary to this disease.The diagnosis of visceral myopathy is difficult,paralytic ileus,chronic constipation and systemic sclerosis must be considered in the differential diagnosis.The progression of the disease is slow,and the longterm prognosis is poor.In this article,the diagnosis and treatment of visceral myopathy causing acute intestinal pseudoobstruction were introduced based on the clinical data of 1 patient.

Objective To study the clinical manifestations,endoscopic features,pathological features,treatment and prognosis of patients with duodenal neuroendocrine carcinoma (DNEC).Methods The clinical data of 9 patients with duodenal neuroendocrine carcinoma who were admitted to our hospital from December 2006 to December 2014 were retrospectively analyzed.Results There were 6 males and 3 females.The mean age was 61.5 years (range 48 ～75 years).The clinical manifestations were abdominal pain (n =7),jaundice (n =4),melena (n =1) and asymptomatic (n =1).The DNEC was usually solitary in the duodenum.The operations included duodenopancreatectomy (n =5),surgical resection (n =2),subtotal gastrectomy (n =1),and 1 patient was palliated by common bile duct stenting using an endoscopic retrograde cholangio-pancreatographic (ERCP) approach.The patients were followed up for 3 ～ 40 months after operation.For the 5 patients who underwent radical excision 4 were alive.One patient died from liver metastasis.For the 4 patients who underwent palliative therapy,one was alive,two died and one lost to follow-up.Conclusions The clinical manifestations of duodenal neuroendocrine carcinoma were non-specific.Endoscopic,pathologic and immumohisotochemical tests were important in the diagnosis.Surgical resection improved the prognosis of these patients.

Objective To investigate the curative effect of transcatheter arterial chemoembolization (TACE) combined with endovascular 125I seed strip implantation for the treatment of primary hepatocellular carcinoma (PHC) complicated by extensive portal vein tumor thrombus. Methods The clinical data of 72 patients with PHC complicated by extensive portal vein tumor thrombus were retrospectively analyzed. The patients were divided into group A (n=32) and group B (n=40). TACE combined with endovascular 125I seed strip implantation was performed for the patients of group A, while only TACE was employed for the patients of group B. The changes of portal vein tumor thrombus, the survival time and procedure-related adverse events were recorded. The preoperative and postoperative measured values were compared using paired samples t test, the count data were evaluated by χ2 test, and the survival time was analyzed with Kaplan-Meier method. Results Technical success rate of portal vein 125I seed strip implantation was 100%. No serious procedure-related adverse events occurred. The median survival periods of group A and group B were 210 days and 141 days respectively, the difference between the two groups was statistically significant (P=0.012). Conclusion For the treatment of primary hepatocellular carcinoma complicated by extensive portal vein tumor thrombus, TACE combined with endovascular 125I seed strip implantation can significantly improve the patient’s survival time.