Objective To examin and analyze the structure, ultrastructure and the circulation of the spleen ellipsoid in the soft-shelled turtle, Pelodiseus sinensis. Methods Twelve turtles were used and observed by light- and electron-microscopy and injection of ink suspension in this study. Results The spleen white pulp was consisted of the periarteriolar lymphatic sheath (PALS) and periellipsoidial lymphatic sheath (PELS). There was no lymphoid nodule in the spleen. Red pulp included splenic cords and splenic sinusoids. The marginal zone was not found in the turtle spleen. When the central arteriole left out of the PALS, it divided into several ellipsoid capillaries which were surround by the PELS. The end of the ellipsoid capillary opened directly to the splenic cord and the blood cells then entered into the splenic sinusoid through the gap between the endothelial cells. The ellipsoid capillary was consisted of simple cuboidal epithelium with an uncompleted basement membrane. The ellipsoid wall was consisted of supporting cells,ellipsoid-associated cells and reticular fibres. Lymphocytes and red cells were always found on the ellipsoid wall. After 40min of the injection of ink suspesion, much carbon particles of ink were restricted on the wall. Conclusion The ellipsoid capillary in the soft-shelled turtle, just like the high endothelial venule, was the important passage of the lymphocytes and blood cells going out and into the lymph tissue. The splenic circulation in the turtle belongs to the opening model.

To investigate the dose effect of isocenter difference during IMRT dose verification with the 2D chamber array. The samples collected from 10 patients were respectively designed for IMRT plans, the isocenter of which was independently defined as P(o), P(x) and P(y). P(o) was fixed on the target center and the other points shifted 8cm from the target center in the orientation of x/y. The PTW729 was used for 2D dose verification in the 3 groups which beams of plans were set to 0 degrees. The γ-analysis passing rates for the whole plan and each beam were gotten using the different standards in the 3 groups, The results showed the mean passing rate of γ-analysis was highest in the P(o) group, and the mean passing rate of the whole plan was better than that of each beam. In addition, it became worse with the increase of dose leakage between the leaves in P(y) group. Therefore, the determination of isocenter has a visible effect for IMRT dose verification of the 2D chamber array, The isocenter of the planning design should be close to the geometric center of target.
Gamma Rays ; Humans ; Radiotherapy Dosage ; Radiotherapy, Intensity-Modulated ; instrumentation ; methods

OBJECTIVE:To observe therapeutic efficacy and safety of entecavir combined with long-acting interferon in the treatment of HBeAg positive chronic hepatitis B (CHB).METHODS:A total of 140 patients with HBeAg positive CHB selected from our hospital during May 2013-May 2015 were divided into observation group and control group according to random number table,with 70 cases in each group.Both groups received routine liver-protecting treatment;control group was additionally given Peginterferon α-2b injection 80 μg subcutaneously,once a week;observation group was additionally given Entecavir dispersible tablets 0.5 mg,po,qd,on the basis of control group.Both groups received treatment for consecutive 50 weeks.Clinical efficacies,liver function indexes before and after treatment,virological efficacies and the occurrence of ADR of 2 groups were observed.RESULTS:Each 5 cases withdrew from the study in 2 groups,and 130 cases (65 cases in each group) completed the study.Total response rate of observation group was 90.8％,which was significantly higher than 76.9％ of control group,with statistical significance (P＜0.05).Before treatment,there was no statistical significance in the levels of ALT,AST,ALB or TBIL between 2 groups (P＞0.05).After treatment,the levels of ALT,AST and TBIL in 2 groups were decreased significantly,while ALB level was increased significantly,the observation group was significantly better than the control group,with statistical significance (P＜0.05).After 50 weeks of treatment,the negative conversion rate of HBV-DNA,HBeAg serology conversion rate and ALT normalizing rate of observation group were significantly higher than those of control group,and virologic breakthrough rate was significantly lower than control group,with statistical significance (P＜0.05).No severe ADR was found in 2 groups.There was no statistical significance in the incidence of ADR (P＞0.05).CONCLUSIONS:The entecavir combined with long-acting interferon show defmite therapeutic efficacy for HBeAg positive CHB,inhibit the replication of HBV and improve liver function of patients with good safety.

Lung cancer is the leading cause of cancer-related deaths worldwide. Targeted therapy is beneficial in most cases, but the development of drug resistance stands as an obstacle to good prognosis. Multiple mechanisms were explored such as genetic alterations, activation of bypass signaling, and phenotypic transition. These intrinsic and/or extrinsic dynamic regulations facilitate tumor cell survival in meeting the demands of signaling under different stimulus. This review introduces lung cancer plasticity and heterogeneity and their correlation with drug resistance. While cancer plasticity and heterogeneity play an essential role in the development of drug resistance, the manipulation of them may bring some inspirations to cancer prognosis and treatment. That is to say, lung cancer plasticity and heterogeneity present us with not only challenges but also opportunities.
Carcinoma, Non-Small-Cell Lung ; genetics ; metabolism ; Drug Resistance, Neoplasm ; genetics ; Humans ; Lung Neoplasms ; genetics ; metabolism