Objective:To observe the preoperative changes of human platelet glycoprotein CD 41 and CD 62P in gastric cancer,aiming to laying the foundation for studying the relation between the changes of formation and constitution of CD 41 and CD 62P and cancerous growth and transition,meanwhile,maintaining the basis for the prevention of thrombotic disease after operation.Methods:Immune electron microscopy was applied to study the changes of CD 41 and CD 62P in 9 cases of gastric cancer and in 5 cases of normal group.Results:Compared with normal group,the contents of CD 41 and CD 62P in gastric cancer were increased,and got more during operation,especially got most in 30 minutes after operation.The changes of CD 41 and CD 62P were observed not only in quantity but also in formation and constitution.Conclusion:Platelets are activated in patients with gastric cancer before operation.Operation can further activate human platelets.

Caspase proteins play a key role in the process of promoting apoptosis,we can often detect caspase proteins in hepatic ischemia-reperfusion injury and in experimental study on apoptosis.Now studies on caspase proteins in hepatic ischemia-reperfusion injury of experimental field are reviewed.

Children's portal hypertension is a hemodynamic abnormalities syndrome,it refers to children with portal vein pressure exceeds 5 mmHg,or portal vein,hepatic venous pressure gradient exceeds 10 mmHg.Etiology of portal hypertension of children:portal vein obstruction,congenital hepatic fibrosis,biliary atresia.Current treatment methods are:drug treatment,varicose vein ligation or sclerosis,surgical treatment.Although the incidence of children's portal hypertension is relatively low,it can cause various serious complications,such as ascites,gastric variceal bleeding,hepatic encephalopathy and so on.To increase awareness,improve the cure rate and reduce complications,the artical will review the children's portal hypertension etiology,pathogenesis,diagnosis,and treatment progress.

Objective To establish a human HepG2 cell growth model under the low oxygen environment induced by cobalt chloride in order to observe the impacts of human HepG2 cell proliferation,cellular cycles and apoptosis,namely cellular growth conditions,under the low oxygen environment induced by cobalt chloride with different concentrations and to study the HepG2 cell growth mechanism under the low oxygen environment induced by cobalt chloride.Methods The human HepG2 cells in the logarithmic phase were randomized grouping as control group and CoCl2 experimental group with different concentrations (50 μm/L,100 μm/L,150 μm/L and 200 μm/L).① HepG2 cell proliferation was tested by MTT assay to calculate cell's suppression rate and draw HepG2 cell growth inhibition curves.② The move ability of HepG2 cells was observed by scratch test.③ The cellular apoptosis and periodic changes were detected using the flow cytometer Annexin-V FITC/PI double-staining and PI single staining methods.④HepG2 cell's Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and Bcl-2 protein expression were detected by Western Blot.Results ① The test results obtained via MTT assay showed that CoCl2 suppressed the human HepG2 cell proliferation within a certain amount of time and concentration and presented a time-dose dependent relation.② Scratch damage trial suggested that the cobalt chloride suppressed the HepG2 cell migration and wound repair capacity and presented a concentration dependent relation.③ Flow cytometer' s test results revealed that the apoptosis rates (％) in control group and experimental group with different concentrations (50 μm/L,100 μm/L,150 μm/L and 200 μm/L) were 3.42,7.74,13.07,20.56,28.53 and 44.45 (P ＜0.05),respectively.The apoptosis rate of the experimental group was significantly increased compared with the control group,as well as showing a concentration dependency.The results of cellular cycles revealed that the cobalt chloride significantly suppressed the HepG2 cell's periodic changes along with increases of concentration,as well as blocked the cell cycle staying in phase G1,thereby suppressing cell proliferation.④Western Blot test:Compared with the control group,the Bcl-2 protein expression was significantly decreased in the experimental group after treatment of cobalt chloride with different concentrations.Conclusion Within a certain range,CoC12-indiuced low oxygen environment can suppress the human HepG2 cell proliferation and healing migration capacity,induce apoptosis and present a time-dose dependent relation.The mechanism is likely associated with decreases of Bcl-2 protein expression.

Objective To explore the impact and significance of hypoxia preconditioning on the expression of cytochrome C and caspase 3 protein in rats after hepatic resection.Methods A hepatectomy model was used to study the ischemia reperfusion injury in hepatic resection.Sprague-Dawley rats were randomly divided into the following three groups:normal control (NC) group,hepatic resection(HR) group,and hypoxia preconditioning (HP) group,there were twenty four rats in each group.HP Group was given an 10％ oxygen-mixed gas for 90 minutes before the operation.At 1,6,12 and 24 hours after the operation,the rats were killed and the following tests were conducted:(1) Liver tissue was sampled to observe the expression of cytochrome C and caspase 3 protein; (2) blood was drawn to conduct a chemical examination; (3) Liver tissue and morphology was observed by transmission electron microscopy.Results The serum levels of ALT and AST in HP group were significantly lower than that of HR group (P＜0.05) at 1,6,12 and 24 hours after the hepatic resection.In each time,liver function of the HP group was significantly better than the HR group; The expression of cytochrome C and caspase 3 protein was decreased significantly in HP group at each measurement point.Hepatic cells in HR group showed typical apoptosis signs under transmission electron microscopy (TEM),but no apoptosis was found in HP group.Conclusion HP has marked inhibition to apoptosis by down-regulating the expression of Cyt C and Caspase-3protein and protection to chondrosomes after a hepatic resection.

OBJECTIVETo explore the significance of multi-detector CT (MDCT) in differential diagnosis of papillary renal cell carcinoma and chromophobe renal cell carcinoma.

METHODSClinical data of forty-one cases of renal cancers confirmed pathologically were collected, including 21 cases of papillary renal cell carcinoma (PRCC) (14 type I, 7 type II) and 20 cases of chromophobe renal cell carcinoma (ChRCC). Their morphological and MDCT characteristics were retrospectively analyzed. Receiver operator characteristic curve (ROC) was used to analyze the value of MDCT in differential diagnosis of PRCC and ChRCC. Two senior radiologists analyzed the morphological and the dynamic enhancement characteristics of the images. The attenuation of the lesions and the adjacent renal parenchyma were measured. The morphological indexes were compared with chi-square test and the quantitative indexes were compared with independent sample T-test. Receiver operator characteristic curve (ROC) was used to analyze the sensitivity, specificity and accuracy of diagnosis of PRCC and ChRCC.

RESULTSAngioid enhancement and filled enhancement were more common in ChRCC than in PRCC, while delayed enhancement was more often seen in PRCC than in ChRCC. Calcification was more common in type I than type II PRCC. The enhancement value (ΔCT value) in corticomedullary phase was (29.08 ± 20.12) Hu for PRCC, significantly lower than the (48.29 ± 26.70) Hu for ChRCC (t = -2.611, P = 0.013). The ΔCT value of type I PRCC in corticomedullary phase was (26.36 ± 18.16) Hu, showing a significant difference from that of ChRCC (t = -2.666, P = 0.012). The lesion to kidney ratio (LKR) in corticomedullary phase was 0.44 ± 0.19 for PRCC and 0.58 ± 0.15 for ChRCC, with a significant difference between them (t = -2.587, P = 0.014). The LKR of type I PRCC in corticomedullary phase was 0.39 ± 0.15, showing a significant difference from that of ChRCC (t = -3.628, P = 0.001). The difference value (D-value) of the attenuation of lesion between corticomedullary and nephrographic phases was (-3.69 ± 8.90) Hu for PRCC and (8.39 ± 21.98) Hu for ChRCC, with a significant difference between them (t = -2.285, P = 0.031). The D-value of type I PRCC was (-4.55 ± 9.82) Hu, showing a significant difference from that of ChRCC (t = -2.323, P = 0.028). There was no significant difference between the ΔCT, LKR and D-value of the type II PRCC and ChRCC (P > 0.05 for all). The area under the curve (AUC) for ΔCT value, LKR value in corticomedullary phase, and D-value were 0.718, 0.751 and 0.668, respectively, and there were no significant differences among them (z values were 0.896, 0.683 and 0.559, respectively, and P values were 0.370, 0.495 and 0.576, respectively). Using 49.350 Hu as the cutoff value for ΔCT value in corticomedullary phase, resulted in a sensitivity, specificity and accuracy of 50.0%, 90.5% and 70.7%, respectively. Corresponding values were 65.0%, 81.0% and 73.2%, when using a cutoff value of 0.532 for LKR in corticomedullary phase, and were 60.0%, 76.2% and 68.3%, when using a D-value of 0.400 Hu.

CONCLUSIONSThe ΔCT value, LKR value in corticomedullary phase, and the D-value are all useful indexes for the differentiation of PRCC and ChRCC.

Area Under Curve ; Calcinosis ; Carcinoma, Renal Cell ; diagnosis ; Diagnosis, Differential ; Humans ; Kidney ; Kidney Neoplasms ; diagnosis ; ROC Curve ; Retrospective Studies ; Sensitivity and Specificity

Objective:To summarize the clinical efficiency of paclitaxel drug coated balloon (DCB) in femoral popliteal artery disease.Methods:Retrospective analysis was made on 125 patients (141 limbs) admitted from Jun 2016 to Jul 2019 for femoral popliteal disease treated with DCB.Results:Median follow-up time was 19 months. The average lesion length was (138±78) mm, with an overall cumulative primary patency rate of 81.4% and 60.8% at 12 and 24 months postoperatively and f-TLR rates of 90.1% and 83.0%, respectively. In a total of 109 primary lesions, subgroup analysis showed that among the TASC C/D primary lesions, the primary patency rate was significantly lower in those with combined severe calcification and the f-TLR rate in those with popliteal involved lesions. TASC grade C/D lesions, severe calcified lesions were independent risk factors for patency, while hypertension was an independent protective factor.In-stent restenosis (ISR) target lesions involving the popliteal segment had a significantly worse prognosis than ISR of the superficial femoral artery.Conclusion:DCB in the treatment of lower femoral popliteal artery lesions can achieve a satisfactory medium-term patency outcome, while the efficacy for complex lesions still needs further improvement.