Toll like receptors (TLRs) are the most characteristic of pathogen recognition receptors.TLR signal pathway affects the outcome of cervical HPV infection,and plays double roles of promoting or inhibiting tumor in immune regulation for the process from high-risk HPV infection to cervical cancer.The polymorphism of TLR gene is closely related to the occurrence of cervical cancer.

The generation and activity of serum neuralizing antibody in cynomolgus monkeys and SD rats undergoing long-term toxicity study with antitumor peptides HM-3 were investigated.The rats were administered intravenously with HM-3 at doses of 4.5 mg/kg,13.5 mg/kg,and 40.5 mg/kg for 6 months,and the cynomolgus monkeys were administrated intravenously with HM-3 at doses of 3 mg/kg,9 mg/kg and 27 mg/kg for 6 months,respectively.Anti-HM-3 antibodies and their neutralizing activities in serum samples taken every month after the administrations were determined by ELISA and cell migration assay,respectively.During the long-term administrations,anti-HM-3 antibodies were generated in some SD rats at high and moderate dose groups,and the antibody-neutralizing activities could be detected in a number of these samples (P ＜0.05).However,activity could be detected in very few monkeys (P ＜ 0.05),and the antibody titers were not correlated with the neutralizing activities.Therefore,we conclude that the antigenicity of HM-3 was low,but after long-term administration at high dose,low affinity neutralizing antibody could be generated in small number of samples.

Aim To investigate the expression of CD31 , CD105 , HIF-1αand VEGF in xenografts tumor of HT-29 tumor cells during different stages of growth. Methods HT-29 tumor cells were transplanted into nude mice, the tumor was removed when the tumor volumes reached <100 mm3 , 100 ~300 mm3 and >300 mm3 respectively. Immunochemical method was a-dopted to detect the expression of CD31 , CD105 , HIF-1α and VEGF. Results HT-29 xenografts tumor vol-umes <100 mm3 , 100 ~300 mm3 , and >300 mm3 showed expressions with CD31-MVD at 37.40±4.17 , 18.80±1.72 and 14.20±2.23 respectively; CD105-MVD at 22.80 ±3.54 , 15.60 ±1.35 and 10.20 ±2.48; positive expression rate of VEGF was 26.20%
±0.83%,40.73% ±6.29% and 13.41% ±1.20%respectively; while positive expression rate of HIF-1αwas 3.20% ± 2.97%, 11.89% ± 1.94% and 80.62% ±3.47% respectively. On the other hand, for different volumes group, CD31-MVD, CD105-MVD, VEGF and HIF-1αexpression ratios had signifi-cant differences ( P <0.01 ) . Conclusions The ex-pression of MVD and vascular-related factors within the tumor caused by HT-29 xenografts tumor in nude mice at different growth stages was varied. There was a cer-tain correlation between tumor volume and MVD, VEGF, HIF-1α.

Aim To evaluate whether the combination of polypeptide AP25 and docetaxel is more efficient in treating experimental breast cancer,than either reagent used alone,and to offer suggestions for clinical use. Methods An experimental breast carcinoma model was set up to investigate the anti-tumor effects of AP25 and docetaxel combination.The Q value was caluculat-ed by Guinness rules and the anti-tumor effects of the combination of polypeptide AP25 and docetaxel were e-valuated.Results The treatment by the combination of polypeptide AP25 and docetaxel showed a better tumor inhibition rate.The combination of AP25 20 mg ·kg -1 and docetaxel 10 mg·kg -1 significantly inhibi-ted the tumor growth with 0.85 1.15,showing a synergistic effect.Conclusions The combination of AP25 and docetaxel can significantly in-hibit the tumor growth with a synergistic effect and de-crease the dose of chemotherapy.

Aim To study the anti-inflammatory activity of the Channa argus bile.Methods The bile was isolated and purified by extraction and silica gel column chromatography.Then the compounds were identified by hydrogen and carbon spectra.The spleen lymphocytes proliferation assay and Lipopolysaccharide(LPS) induced mouse macrophage RAW264.7 releasing Nitrogen Monoxide(NO) experiment were used to evaluate the anti-inflammatory activity.Results Compound(C1) of sodium taurocholate and compound(C2) of sodium taurochenodeoxycholate were isolated by activity tracing.The cell relative viabilities of the two compounds on Concanavalin A(Con A) induced spleen lymphocytes proliferation assay were 65.9%±11.7% and 60.5%±9.4%, which were significantly different from the result of model group (P<0.01), respectively.The NO production of LPS-induced RAW264.7 release of NO was (16.4±1.9) μmol·L-1 and (15.5±1.7) μmol·L-1, which were significantly different from the result of model group(P<0.01).Conclusion Sodium taurocholate and sodium taurochenodeoxycholate from Channa argus perform the anti-inflammatory activities but have no cytotoxic effect on spleen lymphocytes and macrophage.

With the development of recombinant DNA technology, genetically altered mouse models for human cancers are critical to the investigation and characterization of oncogene and tumor suppressor gene expression and function and the associated cancer phenotype. Recently, the inhibition of tumor angiogenesis becomes a new “hot spot” in cancer researches. And the genes involved in the regulation of tumor angiogenesis play an increasingly important role in the field of tumor researches. This review is about the progress of the research in transgenic tumor models and focuses on genes regulating tumor angiogenesis associated with transgenic mice model.

Aim To investigate effects of ZX-5 on the expression and activity of nitric oxide synthase ( NOS) in endothelial cells,and to confirm which kind of NOS increases NO production and promote choroidal blood flow in ZX-5 -induced HUVECs. Methods HUVECs ( human umbilical vein endothelial cells) were used to determine the expression of eNOS,iNOS and nNOS by Western blot; the activities of NOS were investigated by the corresponding kit. Results ( R,R) ZX-5 upregulated eNOS expression and increased NO production; ( S,S) ZX-5 upregulated iNOS expression and slightly increased NO release. Conclusions ( R,R) ZX-5 promotes choroidal blood flow via upregulating eNOS expression and activity and promoting NO production; the compound may be used for the prevention and treatment of age-related macular degeneration in the elderly.

In this article, we report the pancreatic islet cells function of newborn pig pancreatic tissues cultured by Ham F_(10), and the condition of graft survived into the bodies of Sprague-Dawley rats, and also study the influence of Glycyrrhiza uralensis to the grafts. The cultured islet cells of newborn pig were transplanted into the mesenteric cavities (the first & second group), kidney cystic(the third group) and brain tissucs (the fourth group) of the 4 groups adult Sprague-Dawley rats. The first group rats drank Glycyrrhiza uralensis water, after 8～11weeks of operation a examination pathological was made with the cut graft The results showed that the first and second group grafts survived over 11weeks, and survived better the group drunk the Glycyrrhiza uralensis water was much better than other. The purpose of this experiment is to find the heteropolar source of pancreatic tissues offering body.

Purpose The diagnosis, treatment and prognosis of benign and malignant biliary stricture are significantly different. This study aims to evaluate the quantitative analysis of biliary structures using magnetic resonance cholangiopancreatography (MRCP) combined with dynamic contrast enhanced CT (DCE-CT).Materials and Methods The quantitative parameters of MRCP and DCE-CT imaging data from 27 patients with benign biliary stricture (benign group) and 30 patients with malignant biliary stricture (malignant group) were retrospectively analyzed. The wall thickness, stricture length and diameter, proximal ductal dilatation and degree of enhancement in two groups were compared, and its correlation was analyzed to evaluate the accuracy of MRCP and DCE-CT.Results There were significant differences in wall thickness [(3.2±2.0) mmvs (2.1±0.6) mm], stricture length [(15.8±8.1) mmvs (9.5±6.5) mm] and diameter [0 mmvs (2.0±0.9) mm], proximal ductal dilatation and the degree of enhancement [(12.7±3.6) mmvs (9.3±2.7) mm] between the two groups (t=2.825, 3.270, 4.025,P<0.001;Z=-3.909,P<0.001). Multivariable stepwise regression analysis showed that the wall thickness and diameter, and the CT HU in portal venous and equilibrium phases combined with CT plain scanning were significant predictors of malignant biliary strictures (t=-6.424-2.309,P<0.05). The sensitivity, specificity, inter-modality agreement and Youden index of MRCP and DCE-CT in diagnosing 57 patients with biliary stricture were 96.67%, 100.00%, 98.25% and 0.97, respectively; with statistical significance in predicting benign and malignant biliary stricture (AUC=0.994,P<0.001).Conclusion Using MRCP and DCE-CT, the wall thickness and diameter of the stricture, and the difference in CT HU in portal venous and equilibrium phases combined with CT plain scanning are valuable in differential diagnosis of benign and malignant biliary stricture.

Objective To study the cytotoxicity against brain microvessel endothelial cells and blood compatibility in rats of OX26 conjugated endomorphin (EM) loaded hyperbranched polyglycerols-poly(lactic-co-glycolic acid)(HBPG-PLGA) nanoparticles.Methods Prepared nanoparticles were divided into group B (HBPG-PLGA nanoparticles),group EP (EM-HBPG-PLGA nanoparticles) and group OEP (OX26-EM-HBPG-PLGA nanoparticles).The cytotoxicity against brain microvessel endothelial cells (BMECs) of nanoparticles of different groups were measured by MTT test,haemolysis test,normal haemotological parameter and several primary items of coagulation system were tested after nanoparticles of different groups and different dosages injection on rats.Results ①All the three groups of nanoparticles induced decreased cell viability in a dose dependent manner in MTT test,whereas all groups of nanoparticles showed low cytotoxicity against the BMECs during 30 to 600 μg/ml.②There was no significant difference in haemolysis ratio (P＞0.05) and normal haemotological parameter (P＞0.05).③There was no significant difference between the low dosage of all the three groups of nanoparticles and the control group on the function of coagulation system in rats (P＞0.05).④Compared with C group,high dose groups demonstrated longer prothrombin time (PT),activeated partial thromboplasting time (APTT) and lower fibrinogen (Fbg) (P＜0.05).At the same time,compared with the low dose subgroups,PT and APTT were prolonged,Fbg significantly decreased in the high dose subgroups (P＜0.05 or P＜0.01).Conclusion OX26 coupled with EM-HBPG-PLGA nanoparticles showed low cytotoxicity against BMECs and had no significant effect on the coagulation system in rats with low concentration and low dosage.