Objective: To study the expression of the proliferating c el l nuclear antigen (PCNA) and cell nuclear area in the different layers of oral d ysplasia epithelium. Methods: S-P immunohistochemical method an d morphometric technique(computer image measurement method) were used to examine the PCNA and cell nuclear area in the different layers of the normal oral epith elium(NOR) in 8 cases and abnormal oral epithelium in 46 cases including mild d ysplasia(LD), moderate dysplasia(MD), severe dysplasia(SD) and well-differentia ted squamous cell carcinoma(SCC). Results: The positive PCNA sta ining cells in normal epithelium was found mainly in the basal layer. The prolif erating index(PI) in the whole layer of abnormal oral epithelium were increased (P05). PI in the basal la yer of abnormal epithelium was higher than in NOR (P0.05). PI in the spi nosum layer and superficial layer (granulosum and lucidum layer) increased with the development of the lesions, The cell nuclear area in the basal and spinosum layer of the abnormal epithelium increased(P

Objective To investigate the characteristic and satisfaction degree of clinical applica-tion of "fingers pain score model" from the aspects of nurses and patients in order to evaluated the fea- sibility and pragmatism of the model. Methods "Fingers pain score model" was designed and to-gether with the NRS- 10 scale were applied in clinic for 2 years. Evaluation from both nurses and patients were in-vestigated after two-year probation, and the results underwent χ<'2> test. Results Evaluation from nurses on convenience, fidelity, communication and satisfaction of "fingers pain score model"were all sig-nificantly higher compared with the control. And evaluation from patients on direct-viewing,accuracy,re-ception and satisfaction of "fingers pain score model"were different from the NRS- 10 control, except for the fidelity. Conclusions Outweighing the NRS- 10 scale, the "fingers pain score model" is a better choice to meet the needs of the nurses and patients in pain evaluation in clinic.

Objective To investigate the selection of flaps for the reconstruction of facial skin defects.Methods A total of 40 patients with facial skin defects were treated from February 2011 to February 2015 in our hospital,and they were given different surgery methods ac-cording to the different facial skin defect sizes.Minor defects were primarily treated by direct suturing;medium-sized defects were treated by local skin flap transposition or island skin flap;and larger defects were treated by expanded skin flap.Results All patients were followed up for 1 to 2 years.All the flaps survived with good color and texture match.All the scars healed well which were almost invisible.There was no obvious deformity in the donor and recipient sites.In addition,there was no lesion recurred.Conclusion Select suitable flaps for the recon-struction of facial skin defects according to the face defect area could get reliable blood supply of the flap,inapparent incision scar and a high level of satisfaction.

Objective To investigate the protective effect of the first window(FW)of liver ischemic preconditioning(IPC),the second window(SW) of remote(leg) ischemic preconditioning(RPC) and conbined applications of liver and lges IPC to against liver ischemia/reperfusion(I/R) injury in the rat,and to investigate the mechanism of the protection.Methods Rats were randomly divided into five groups(n=8 each):(1) Sham group(S group),rats without IPC,(2) Rats with 5 min IPC(IPC group);(3) Rat wiht both liver and lower limbs IPC and repeated three times(RPC group);(4) IPC 24 h after RPC group;(5) IR without IP(I/R group);except S group,the rats were subjected to 60 min sustained liver ischemia followed by 180 min reperfusion.All ischemia rats were only subjected to 70% liver ischemia.Finally,blood and liver samples were obtained to determine the activity of ALT and AST,the expressions of TNF-? and HSP70 protein,and liver wet/dry weight(W/D) and pathology.Results All IPC group and RPC group and IPC+RPC group had obviously lower levels of ALT,AST,W/D,TNF-? than that of the I/R group(P0.05).Conclusions The FW of the IPC,the SW of the RPC and combined applications can lessen hepatic I/R injury.There is no significant difference in the protective intensity of the 3 motheds.The protective effects possibly are due to suppression of TNF-? production,induction of protein HSP70 expression and improvement of liver microcirculation.

Objective:To compare the bonding strength of 3M Adper Easy One(3AEO),Clearfil S3 Bond(CSB)and Super-Bond C&B(SBCB)in vertical tooth fracture mode.Methods:30 freshly extracted human molars were randomly assigned to three groups(n =10).The teeth were cut along the long axis with low speed cutting machine and were prepared into a unified model of the vertical tooth fracture.The three adhesives were respectively used to adjoin the surface of the fractured teeth.The samples were subjected to thermal cycling for 500 cycles,stored in distilled water at 37 ℃ for 24 h.Then the pillar-like specimens with the bonding area of 1.0 mm × 1.0 mm were prepared.The microtensile bond strength was measured and the fracture mode was observed.Results:The bond strength (MPa)of 3AEO,CSB and SBCB was 18.57 ±4.98,16.93 ±4.70 and 22.75 ±5.18 respectively(P <0.05).The fracture mode was mainly interficial failure in all groups(P >0.05).Conclusion:The surface bonding of Super-Bond C&B in tooth fracture is stronger than 3MAdper Easy One and Clearfil S3 Bond.

Objective To evaluate the role of 5-hydroxy trptarine 2A receptor (5-HT2A) in the pathogenesis of biliary fibrosis after liver transplantation in rats.Method Rats were randomly divided into control group Ⅰ and control group Ⅱ[(supplied livers were preserved for 1 or 12 h),ketanserin group (recipients of control group Ⅱ were intraperitoneally injected with ketanserin 24 h postoperatively at the dosage of 5 mg · kg-1 · day-1),and sham group (rats were subjected to transverse laparotomy and closure without manipulation of the liver).During 4-week observation period,serum biliary enzymes,5-HT content in the liver,the expression of fibrosis-related genes,cholangiocytes proliferation and biliary fibrosis were evaluated.Result Compared with the sham group,the serum ALP,GGT,TBil and 5-HT contents in the liver homogenate were increased on the postoperative day 1 (POD1) and then restored to the normal level.There was slight proliferation of bile duct epithelial cells on POD3 in the control group Ⅰ,with fewer collagen fibers and α-sooth muscle actin (α-SMA)-positive myofibroblasts in the portal area.The expression of matrix metalloproteinase-2 (MMP-2) and procollagen α1-mRNA in graft livers was not significantly increased in the control group Ⅰ.To the contrast,the control group Ⅱ demonstrated high levels of serotonin in the liver homogenate and enhanced serum biliary enzymes.Active cholangiocytes proliferation was triggered on POD3 and remained higher than in the control group Ⅰ and the sham group.The control group Ⅱ showed a large number of α-SMA-positive myofibroblasts and collegan fibers at the postoperative week 4.In parallel,the major profibrogenic transcripts MMP2 and procollagen α1 were significantly increased at 2nd,and 4th week postoperation in the control group Ⅱ.Importantly,we also found that ketanserin relieved the signs of biliary fibrosis at 4th week postoperation in 5-HT2A group by the demonstration of reduced collagen fibers and a-SMA-positive myofibroblast in the portal area,as well as the decrease in the fibrosis-related gene expression.In addition to the lower cholangiocytes proliferation,serum levels of biliary enzymes including GGT,ALP and TBil in 5-HT2A group were significantly decreased at 4th week postoperation as compared with the control group Ⅱ.Conclusion Selective 5-HT2A receptor antagonist,Ketanserin retards biliary fibrosis progression posttransplantation,suggesting that 5-HT2A receptor is a potential therapeutic target for ischemia-related biliary fibrosis after DCD liver transplantation.

Objective To investigate the protective effect of ischemic preconditioning(IP) on liver ischemia/reperfusion(I/R)injury in rats with cirrhosis.Methods Thirty-two SD rats with liver cirrhosis induced by carbon tetrachloride were randomly divided into IP group and Non-IP(NIP) group,according to whether an IP was performed before liver I/R injury or not.The function of liver, superoxide dismutase(SOD),glutathione peroxidase(GSH-PX),malonyldialdehyde(MDA),adenine nucleotide(ATP,ADP,AMP),energy charge(EC),nitric oxide(NO)in liver tissues,the changes in liver histology,and one-week survival rate after the test in both groups were compared.Results Compared with NIP group,the serum AST,ALT ,and LDH and the MDA contents significantly decreased(P

BACKGROUND:Early detection and accurate staging diagnosis of heart failure are the basis of good clinical therapy efficacy. Due to lack of simple and effective staging model for the diagnosis of heart failure, it is difficult to diagnose heart failure in clinics, leading to poor control of heart failure. OBJECTIVE:To establish the disease staging model based on Adaboost and SVM for heart failure, and improve the accuracy of diagnosis and staging of heart failure. METHODS:A total of 194 cases were roled into this study, including heart failure patients and healthy physical examination persons. According to the stage standards formulated by American Colege of Cardiology and American Heart Association, specific clinical feature parameters closely related to heart failure were colected and selected. Based on clinical diagnosis results and using Adaboost model and SVM model, we trained the models for heart failure diagnosis and staging, thus obtaining diagnosis model. RESULTS AND CONCLUSION: The parameters included stroke volume, cardiac output, left ventricular ejection fraction, left atrial diameter, left ventricular internal diameter at end-systole, N-terminal pro-brain natriuretic peptide and heart rate variability. As for the Adaboost model, its sensitivity and specificity was 100% and 94.4%, respectively. At the same time the SVM model had good sensitivity and specificity, 86.5% and 89.4% respectively. Adaboost classification model can be accurate in the diagnosis of heart failure symptoms, the accuracy reached 89.36%. On the basis of the diagnosis of heart failure, the SVM classification model is effective in staging the severity of heart failure, staging accuracy for staging B and C was 86.49% and 81.48%, respectively. The findings indicate that, combining Adaboost and SVM machine learning models could provide an accurate diagnosis and staging model for heart failure.

Objective·To study the change of circulating endothelial progenitor cells (cEPCs) in acute ischemic stroke (AIS) patients within one week after attack,and the correlation of cEPCs with the prognosis.Methods·Ninty-two patients with AIS (AIS group) and 20 patients with risk factors (Risk group) were recruited.The proportion of cEPCs (CD34TKDR+ cells) in peripheral blood mononuclear cells of AIS patients was measured by flow cytometry (FCM) on the first day of admission and the seventh day after attack.Functional recovery was assessed by modified Rankin Scale (mRS) on the 90th day after onset.The cEPCs percentages of AIS patients with different mRS were compared to analyze their correlation.Results·Compared with Risk group,cEPCs percentage of AIS group on the 1st day of admission was lower (P=0.016).In AIS group,compared with poor prognosis group (mRS＞2),eEPCs percentage of good prognosis group on the 7th day after onset (mRS ≤ 2) elevates (P=0.002).The result of multiple linear regression showed that cEPCs percentage on the 7th day after onset was positively correlated with mRS on the 90th day (t=4.608,P=0.011).Conclusion·The percentage of cEPCs in peripheral blood of AIS patients decreases significantly during the acute phase.The percentage on the 7th day after onset is correlated with prognosis of AIS patients.

Objective To investigate the expressions of Wnt-1 and FZD-1 in small cell lung cancer(SCLC) patients and their relations with chemotherapy resistance,clinical feature and prognosis.Methods Peripheral blood specimens were collected from 41 SCLC patients.The expression of Wnt-1 and FZD-1 in peripheral blood monouclear cells (PBMC) were detected.The relationship among the expression of Wnt-1 and FZD-1,clinicopathologic feature and prognosis was analyzed.Results The relative expression of Wnt-1 and FZD-1 in chemotherapy resistant group was significantly higher than that in chemotherapy sensitive group (all P ＜ 0.05).The expression of Wnt-1was positively correlated with that of FZD-1 (r =0.186,P ＜ 0.05).The FZD-1expression level was not correlated with patients' age,sex and smoking history (all P ＞ 0.05),but closely with clinic-staging (P =0.008).The Wnt-1 expression level was not correlated with patients' clinical features (all P ＞ 0.05).There was statistical difference in median survival time between Wnt-1 and FZD-1 high-expression group and low-expression group.Conclusions Wnt-1 and FZD-1relationships with chemotherapy resistance and prognosis.Wnt-1 and FZD-1 may act as an important role in chemotherapy resistance of SCLC and could be served as indicators for the chemotherapy resistance and outcome assessment of SCLC.