Purpose:To investigate the therapeutic effect a nd toxicity of radiotherapy plus ultrasound hyperthermia for treatment of malign ant tumors. Methods:41 cases of locally advanced, recurrent or radioresista nt cancer treated from January 1997 to January 2000 were given radiotherapy plus Sonotherm 1000 ultrasound hyperthermia. The mean radiation dose was 61?12 Gy;h yperthermia was administered within 30 minutes following radiotherapy with mean heating time of (52.4?6) minutes at 1-2 times/week. 3-year local control and survival were estimated by Kaplan-Meier method and Log rank test, factors affec ting prognosis were analyzed by Cox regression. The significance of differences between temperatures was tested by one-way ANOVA. Results:There was significant difference between Tmin and Tmax on tumor local response. Tumor complete response was 58.5%, the 3-year local co ntrol and survival were 13.6%% and 32.69% respectively. There is significant cor relation between radiation dose, tumor volume, Tmin and 3-year local control ( P

Objective To detect the single nucleotide polymorphism(SNP) of chemokine RANTES promoter of healthy and HIV 1 infected individuals of Han and Uiygur Chinese population, and to evaluate the correlation of their SNPs with HIV 1 infection. Methods Case control study was adopted ,Genotypies of RANTES promoter 403 and 28 from 863 samples were detected by DNA sequencing or by polymerase chain reaction restriction fragment length polymorphism. Results There were two SNPs and six genotypes in Chinese Han and Uiygur. 403 and 28 allelic frequencies were high, but there was no significant difference between the two healthy populations. Strong linkage disequilibrium was observed between the two SNPs. RANTES genotypes were AC/AC, AC/AG, AC/GC, AG/GC, GC/GC, and AG/AG. The haplotypes were GC 62 7% in both rases, AC 28 7% and 30 4%, AG 8 6% and 6 8% in Han and Uiygur, respectively. Compared with AC/AC, odd ratio (OR) of RANTES genotypes AC/AG, AC/GC, AG/GC, and GC/GC was associated with reduced susceptibility to HIV 1 infection. Conclusion Same high RANTES promoter mutation was found in Han and Uiygur populations. Compared with AC/AC, odd ratio (OR) of RANTES genotypes AC/AG, AC/GC, AG/GC 9.9%, and GC/GC might be associated with reduced susceptibility to HIV 1 infection. Further study of the implicated in needed

Whole blood samples were collected from 316 Uigur subjects inhabiting Kashi City, Sinkiang Uigur Autonomous Region, and their genomic DNA was extracted using QIAgen Blood Kit. DNA fragment spanning CCR5?32 and CCR5m303 mutation points were amplified by PCR and genotyped by directed electrophoresis and RFLP with HinCII respectively. In all 316 samples only 22 heterozygotes of CCR5?32 were found, in accordance with Hardy Weinberg equilirium. No CCR5m303 mutation was found. No difference existed between male and female individuals. The frequency of CCR5?32 in Uigur population is 3.48%, similar to Medi Asia ethnic groups (higher than that of Chinese Han people and lower than that of Caucasian people), i.e, in continuity regarding district distribution. Due to its slow down effect on clinical course of AIDS , high frequency of CCR5?32 is highly significant in prevention and treatment of AIDS in Uigur population.

Objective To compare bone marrow and lymph node biopsy specimens of two kinds of multidrug resistance (MDR) proteins expression and clinical significance in untreated non-Hodgkin lymphoma.Methods We developed multiparameter flow cytometric assay to quantify expression of these multidrug resistance (MDR) proteins in lymph node viable blasts and reverse transcriptase-polymerase chain reaction (RT-PCR) method to semi-quantitate mdrl mRNA of non-Hodgkin lymphomas, including 41 lymph node and 37 bone marrow, and further study of the correlation of the multidrug resistance proteins with general clinical parameters and treatment outcome. Results In two kinds of samples P-gp, MRP and LRP over-expression of three kinds of drug-resistant gene and frequencies are very low. Patients with P-gp expression had a poor outcome of chemotherapy than those without P-gp (P ＜0.05), Patients with LRP expression had poor outcome of chemotherapy than those without LRP (P ＜0.01). In the lymph node, P-gp expression was associated with higher clinical stage (P = 0.046), elevated serum lactate dehydrogenase levels (P ＜0.05). MRP wasn' t associated with higher clinical stage (P =0.369), elevated LDH (P =0.762) and higher malignant degree(P =0.214). LRP expression was associated with higher clinical stage, elevated LDH and higher malignant degree (P ＜0.05). And in the bone marrow, LRP expression was associated with elevated LDH (P =0.003), but the others have no differences. Conclusion These data suggest that P-gp and LRP expression are important mechanism of drug resistance associated with worse clinical outcome in previously untreated NHL. The use oflymph node biopsy to detect drug-resistant protein can provide more accurate clinical information than that of bone marrow.

Burnout, Professional ; Humans

Objective To evaluate the effects of allografi and rhBMP-2 in posterolateral lumbar spinal fusion in a rabbit model.Methods Thirty rabbits were randomly divided into three groups:autogenous lilac crest bone graft group,rhBMP-2/allograft composite group,and allograft group.The animals were killed and sampled six weeks after the surgery.The lumbar intertransverse process fusion for the animals was assessed by manual palpation,biomechanical testing,radiography,histology and quantitative histology of spine fusion mass in a 6-week observation.Results The ratio of fusion in rhBMP-2/allograft composite group(90%)was significantly higher than that in autogenous lilac crest bone graft group(40%)and allograft group(20%)(P＜0.05).The autogenous lilac crest bone graft group and rhBMP-2/allograft composite group showed significantly higher uniaxial tensile strength than allograft group.The au- togenous lilac crest bone graft group and rhBMP-2/allograft composite group also showed significantly more new bone formation than allograft group,but there was no significant difference between the former two grnups.Conclusion rhBMP-2/allograft composite may be an ideal substitute for autograft in lumbar spinal fusion.

Objective To investigate whether tissue engineered bone with implanted vascular bun-dles can up-regulate release of vascular endothelial growth factor (VEGF) in models of femoral defect in rabbits.Methods Thirty-two rabbits were randomized into 2 even groups.In both groups, a segmental bone defect of 15 mm in length was made at the left femur before a tissue engineered bone was inserted into the defect.In the experimental group, a femoral vascular bundle was implanted into the tissue engineered bone.In the control group, there was no vascular implantation.At 2, 4, 8, and 12 weeks after implantation, samples were taken to determine new bone formation by histology and expression level of VEGF by immuno-histochemistry.Results The new bone formation was significantly higher in the experimental group at the end of 4, 8, and 12 weeks(P < 0.05) .The expression level of VEGF in the experimental group was also significantly higher than in the control group at all time points after operation, and the expression of VEGF peaked at 4 weeks.Conclusion Tissue engineered bone with vascular bundle implanted can up-regulate VEGF release in models of femoral defect in rabbits.

Objective To report computer-aided three-dimensional visualization of simulated surgery for distal femoral fractures using software Unigraphics NX and Mimics. Methods The preoperative CT scans of 6 patients with distal femoral fractures were used for three-dimensional reconstruction of distal femoral fractures using software Mimics. Three-dimensional reconstruction of the surgical instruments using the modeling function of software Unigraphics NX. The assembly function of software Unigraphics NX was used to vi-sualize the simulated internal fixations of distal femoral fractures with both Less Invasive Stable System plates and the retrograde nails. The operative procedures simulated by the software Unigraphics NX were analyzed preoperatively. Results The simulated operative procedures were clearly and vividly visualized in three-dimensions, The fracture reduction and operative effects could be predicted. Conclusion This system of three-dimensional visualization of simulated surgery for distal femoral fractures using software Unigraphics NX and Mimics can help surgeons make preoperative predictions and select reliable methods to improve the reliability and effectiveness of the orthopaedic surgery.

Objective To investigate the role of protein kinase C (PKC) in reduction of hepatic ischemiareperfusion injury by CO2 preconditioning in rats.Methods Forty-eight male Wistar rats,aged 8-10 weeks,weighing 230-270 g,were randomly divided into 3 groups (n =16 each):hepatic ischemia-reperfusion injury group (group HIRI),CO2 preconditioning group (group P),and c helerythrine (CHE,a specific inhibitor of PKC) group (group CHE).The portal vein,hepatic artery and bile duct of the left lateral and median lobes of the liver were occluded for 1 h,followed by 4 h reperfusion in anesthetized rats.The rats inhaled 50％ O2-50％ N2 for 1 h during mechanical ventilation in group HIRI.In P group,the rats inhaled 50％ O2-45％ N2-5％ CO2 for 1 h during mechanical ventilation and then inhaled 50％ O2-50％ N2 and the hepatic ischemia-reperfusion injury was performed 15 min later.In group CHE,CHE 5 mg/kg was injected intraperitoneally at 10 min before mechanical ventilation,and the other procedures were similar to those previously described in P group.Before mechanical ventilation,immediately before ischemia,and at 0,1,2,3 and 4 h of reperfusion,mean arterial pressure (MAP) was recorded and arterial blood samples were obtained for blood gas analysis.At 4 h of reperfusion,the serum aspartate amino transferase (AST) and alanine amino-transferase (ALT) activities and tumor necrosis factor-α (TNF-α) concentration (by ELISA) were determined and hepatic specimens were obtained for detection of malondialdehyde (MDA) content and superoxide dismutase (SOD) activity (by spectrophotometry),and the expression of activated caspase-3 (by immuno-histochemistry) and PKC (by Western blot) in hepatic tissues.Apoptosis index was calculated by using TUNEL.Results Compared with group HIRI,MAP,PaO2 and PaCO2were significantly increased immediately before ischemia and during reperfusion in group P,MAP and PaCO2 were increased during reperfusion and PaO2 was increased immediately before ischemia and during reperfusion in group CHE,the serum ALT and AST activities,TNF-α concentrations,MDA content and apoptosis index were decreased,and the expression of activated caspase-3 was down-regulated in P and CHE groups,and the SOD activity was increased,and the expression of PKC was up-regulated in group P (P ＜ 0.05 or 0.01),and no significant changes were found in the SOD activity and PKC expression in CHE group (P ＞ 0.05).Compared with group P,MAP was significantly increased immediately after onset of reperfusion,while decreased at 1-4 h of reperfusion,PaO2 was decreased immediately before ischemia and during reperfusion,PaCO2 was decreased at 3 h of reperfusion,the serum ALT and AST activities,TNF-α concentrations,MDA content and apoptosis index were increased,and the expression of activated caspase-3 was up-regulated,and the expression of PKC was downregulated in group CHE (P ＜ 0.05).Conclusion PKC is involved in reduction of hepatic ischemia-reperfusion injury by CO2 preconditioning in rats.

Objective To detect the expression of IL-17 in renal transplant recipients by Luminex and evaluate the relationship between the level of serum IL 17 and early acute renal allograft rejection.Methods 38 kidney transplant recipients and healthy controls (HC,healthy volunteers,n =20) were selected in this study from January 2009 to October 2011.All patients were divided into two groups according to their allograft outcome as acute rejection group (ARG,n-18) and non-rejection group (NRG,n=20).The expression of serum IL-17 was detected by Luminex technique in two groups of kidney transplant recipients and HC.To evaluate the correlation between the level of serum IL-17 and early acute renal allograft rejection.Results The mean level of IL-17 in all renal transplant recipients 1.3 ± 1.9 pg/ml at the pre-transplantation was significantly lower than that in HC (6.9± 8.5 pg/ml,t=3.968,P＜0.001).The results highlighted that the level of serum IL-17 in ARG 3.4±5.8 pg/ml was significantly higher than that in NRG (0.5±0.4 pg/ml) on the 7th days post Kidney transplantation (post KTx,t=2.242,P =0.031).Kaplan-Meier survival analysis showed that the probability of rejectionfree survival in the higher levels group of IL-17 on the 7th days post-KTx was significant lower than that in the lower levels group (P＜0.001).The results of receiver operating characteristic curve showed that the sensitivity and specificity of the combined IL-17 to predict acute rejection were 66.67％ and 100％,respectively.Conclusion The serum IL-17 levels in renal transplant recipients on the 4th and 7th post-KTx days can predict early renal transplant rejection.