0.05). According to the logistic regression, the OR of age was 1.128 which showed that when age increase 1 year, the possibility of contracting CP was higher. The OR of genotype was 0.187 and 0.421, which showed that people with XX genotype were also more susceptible than those with Xx and xx genotype, when the other conditions were invariable. Conclusion:Specific relationship is found between the susceptibility of severe CP and the ER gene-XbaI polymorphism. People with XX genotype are most susceptive to CP.

Objective To investigate the expression and clinical significance of toll-like receptor 9 (TLR9) and hypoxia inducible factor 1 α (HIF-1 α) in pancreatic cancer.Methods The real-time RT-PCR technique,western blot method and immunohistochemical method were used to examine the expressions of TLR9 and HIF-1α in 30 samples of pancreatic cancer,para-cancerous tissues,and 10 samples of normal pancreatic tissues.The relationship between TLR9 and HIF-1 α was determined,and the correlations between their expressions and clinicopathological parameters were measured,and the impact on survival was detected.Results The levels of TLR9 mRNA and HIF-1 α mRNA expression in human pancreatic cancer tissues was 2.32(1.41～3.22) and 2.26 (1.62～ 2.89) folds as many as that in normal tissues.The levels of TLR9 mRNA and HIF-1α mRNA expression in para-cancerous tissues were 1.23 (1.18 ～ 1.28) and 1.36 (1.17 ～1.55) folds as many as that in normal tissues.The expressions in human pancreatic cancer tissues were significantly higher than those in para-cancerous tissues (t =2.642,P =0.023 ; t =4.076,P =0.001).The positive rates of TLR9 and HIF 1α protein were 73.3％ (22/30) and 70.0％ (21/30),and the corresponding values were 33.3％ (10/30) and 36.7％ (11/30) in para-cancerous tissues,while the corresponding values were 20％ (2/10) and 10％ (1/10) in normal tissues,which showed a decreasing trend (x2 =13.99,P =0.001 ;x2 =13.15,P =0.001).The expressions of TLR9 mRNA in human pancreatic cancer tissues was positively associated with HIF 1 α mRNA (r =0.537,P =0.003).The expressions of TLR9 protein was also positively associated with HIF 1α protein (r =0.511,P =0.001).The expressions of TLR9 and HIF 1α were positively correlated with the degree of tumor differentiation,TNM staging and lymph node metastasis,but were negatively correlated with the survival.Conclusions TLR9 and HIF-1α are over-expressed in pancreatic cancer and they are associated with malignant biological behavior and poor prognosis.

Objective To investigate the mechanism by which epidermal growth factor (EGF) accelerates the growth of estrogen-negative breast cancer cell line MDA-MB-435S. Methods Under the effect of EGF cyclin D_1 was measured by Western blot and cell-cycle was assayed by FCM. Results EGF enhanced cyclin D_1 expression. Protein kinase C (PKC) inhibitor Go6976 blocked cyclin D_1 over-expression caused by EGF. In EGF group G_0/G_1 was 69.36%, phase S was 22.77% and PI was 0.31. Differences were all significant compared with control (P

Objective To investigate the level of serum retinol-binding protein 4 (RBP4) and related factors in chronic hepatitis C (CHC). Methods Fifty-six patients with CHC (CHC group) and 35 healthy volunteers (control group) were selected. Serum RBP4 level was measured by ELISA method.Fasting blood glucose ( FBG ), triglycerides (TG), total cholesterol ( TC ), alanine aminotransferase (ALT),γ-glutamyl transpeptidase (γ-GT) were measured, HCV-RNA level was tested by qualitative polymerase chain reaction(q-PCR). Results There were no significant difference in FBG, TC,TG, γ-GT between two groups (P ＞ 0.05 ). Serum RBP4 level in CHC group [(33.38 ± 6.43 ) mg/L] was higher than that in control group [(26.11 ± 3.35) mg/L](P＜ 0.01),the CHC patients with ALT normal (26 cases) had significantly higher RBP4 level [( 38.96 ± 4.09) mg/L] compared with ALT abnormal [30 cases, ( 28.53 ± 3.43 ) mg/L](P ＜ 0.01 ). ALT level was negative with RBP4 in CHC group (r = -0.6368, P ＜ 0.05 ). Conclusion Serum RBP4 level is significantly associated with CHC and negatively correlated with ALT level,but not associated with FBG, TC,TG, γ-GT and HCV-RNA.

Aim To improve the sensitivity of phycobiliprotein immunofluorescence assay(PBPIFA), by introducing into bridged avidin biotin(BRAB) technique,known as BRAB-PBPIFA. Methods Using ELISA as a gold standard, effectiveness of three assays(direct PBPIFA, BRAB-PBPIFA and ELISA)were compared in simultaneous detection of standard antigen and 500 serum samples. Results BRAB improved greatly sensitivity of PBPIFA in detecting antigen of low concentration, and detection rate of weakly positive samples could increase by one times and a half. In the applying, protein-free blocking agent Tween 20 to BRAB-PBPIFA,possessed better blocking effect. Conclusion Combination of BRAB technique with PBPIFA can improve the detcctive sensitivity.

Objective:To examine the adiponectin level in gingival crevicular fluid(GCF)in patients of chronic periodontitis with dia-betes mellitus type 2.Methods:20 patients of diabetes mellitus type 2 with chronic periodontitis(DM&CP),20 of periodontitis(CP) and 20 health subjects(H)were included.The periodontal indexes (SBI,PLI,PD and AL)were measured,GCF samples were quan-tified by periotron 8000,the adiponectin content in GCF was tested by adiponectin ELISA kit.The relationship between the adiponectin level in GCF and the periodontal indexes of the DM&CP patients was analyzed statistically.Results:The adiponectin level in GCF in group DM&CP was significantly lower than that in the other 2 groups(P <0.05).The adiponectin levels in GCF in group CP and H were not statistically different.The adiponectin level in GCF was negatively correlated with PD and AL(P <0.05),but had no correlation with SBI and PLI(P >0.05).Conclusion:Decrease of adiponectin in GCF may play a role in the development of DM&CP.

Objective To study the expression of Mage A1、A2、A3 in breast cancer tissues and four breast cancer cell lines Methods The expression of Mage A1、A2、A3 in breast cancer tissues and four breast cancer cell lines, MCF 7、Sk Br 3、MDA MB 435s and TM40D was detected by reverse transcription polymerase chain reaction (RT PCR) Results The positive expression rate of Mage A in breast cancer tissues was 13/33 (39%), of Mage A1 was 4/33 (12%), of Mage A2 was 8/33 (24%), and of Mage A3 was 7/33 (21%), respectively Both Mage A1 and Mage A3 were positive in breast cancer cell line MCF 7 and Sk Br 3 MDA MB 435s expressed Mage A2 and Mage A3 Mage A3 was positive in TM40D Conclusion Mage genes were often expressed in breast cancer, but expression of Mages varies in the breast cancer cell lines Mage genes encoding proteins are eligible for Mage peptide based active immunotherapy

Objeetive To explore routine magnetic resonance imaging characteristics of newborn bilirubin encephalopathy(NBE).Methods MRI features and clinical data of 17 patients with Newbern bilirubin encephalopathy were retrospectively analyzed, globus pallidus (GP)and subthalamic signal intensity was evaluated.The increase of GP signal intensity and serum total bilirubin peak value were analyzed using pearson correlation analysis.Serum total bilimbin peak value between patients with high signal in the subthalamic nuclei on T1 WI and patients without high signal in the subthalamic nuclei were compared statistically.Results The main MRI presentation in the NBE group Was abnormally increased signal intensity in the GP on T1 WI,which was not apparent on T2 WI One patient showed abnormal high signal intensity in the postemmedial part of GP.Nine patients had high signal in the subthalamic nuclei on T1 WI and normal signal on T2 WI Four patients showed hiigh signal in the brainstem with sparing of dorsal pontine.The increase in value of GP signal intensity was 249.0-423.8 in 12 patients and their serum total bilirubin peak values were 366.0-983.3μmol/L A positive correlation Was found between increase of GP signal intensity and serum total bilirubin peak value.The serum total bilirubin level of abnormal subthalamic group and normal subthalamic group were 660.7±192.4 μmol/L and 513.3±107.5μmol/L respectively.The difference between the two groups was not statistically significant(t=1.914,P＞0.05).Conclusion The routine MRI has some characteristics and is useful in the diagnosis of newborn bilirubin encephalopathy.

Objective To evaluate the safety of dynamic anterior plate fixation for cervical distractive flexion injuries and compare its rigidity between different types of plate design. Methods Twelve sets of cadaveric calf spine were used in this test. All the specimens were made into distractive flexion injury models (C4-C5) ac- cording to Allen's method. After discectomy and grafting, they were randomized into three groups in which Orion, Codman, and Window instrumentations were used respectively. The stiffness of each construct was tested in flexion, extension, lateral bending and axial torsion conditions sequentially. Results Compared with an intact cervical spine, the range of motion (ROM) of an injured cervical spine increased whatever plate was applied. Orion in- strumentation presented stiffness the closest to that of the normal control, except for less torsional stiffness. Codman instrumentation provided stiffness close to that for normal and Orion groups only in lateral bending. Window's was the weakest mad not enough in all kinds of movement. Conclusions Static anterior fixation is the first choice for cervical injuries. Dynamic plate fixation may sacrifice stiffness to some extent, especially when a shifting kind of design is to be chosen.

Objective To investigate the expression of HIF-1 α and toll-like receptor 4 (TLR4) in human pancreatic cancer cell line panc-l under hypoxia.To observe the effect of HIF-1α in the regulation of TLR4 expression in pancreatic cancer cells under hypoxic conditions.Methods Cells were placed in airtight chamber or treated with CoCl2 to mimic tumor hypoxic micro environment.mRNA and protein levels of HIF-lα and TLR4 were detected by reverse transcription-polymerase chain reaction(RT-PCR) and flow cytometric analysis.By RNA interference( RNAi ) originated from small interference RNA (siRNA) to use siRNA was transfected into panc-1 cells.Western blot was used to detect gene scilencing effect on HIF-1α.RT-PCR and flow cytometric analysis was used to observe the change of TLR4 gene expression after HIF-1α gene silence.Results Under hypoxia,both mRNA and protein levels of TLR4 were up-regulated.The siRNA targeting HIF-1α gene down-regulated HIF-1α gene in panc-l cells efficiently,and TLR4 gene was down-regulated as well.Conclusions Hypoxia can increase protein level of TLR4 in pancreatic cancer cells.TLR4 signaling pathway together with HIF-1α may promote development of the pancreatic cancer.