Objective]To explore the diagnostic value of magnetic resonance imaging(MRI)combined transrectal ultrasound (TRUS)to guide prostate cancer detection at different serum prostate-specific antigen(PSA)levels.[Methods]Totally 278 patients who underwent a systematic biopsy were collected in our hospital from November 2014 to June 2016. Preoperative tests of PSA , MRI,TRUS were performed in all the included patients. According to the PSA level of 4~10 ng/mL,10~20 ng/mL,over 20 ng/mL, 278 cases were divided into three group of A ,B ,C. Retrospective analysis was performed within the three groups of diagnostic accuracy.[Results]In Group A,the areas under ROC for MRI+TRUS and TRUS were 0.73 and 0.59,respectively(P = 0.02). In Group B ,the areas under ROC for MRI+TRUS and TRUS were 0.68 and 0.56 ,respectively (P < 0.001). In Group C ,the area under ROC for MRI+TRUS and TRUS were 0.74 and 0.63,respectively(P < 0.001). There is more significant statistical difference in Group B and C.[Conclusion]MRI combined TRUS has higher diagnostic value in cancer detection than TRUS before biopsy between different PSA levels ,which Indicates that MRI combined TRUS is an effective method for the improvement of prostate cancer detection.

Objective To investigate the safety and efficacy of nephron-sparing surgery (NSS)for selective T2 stage renal tumor.Methods The surgical database of 26 patients treated with NSS for clinical T2 stage renal cell carcinomas between March 2010 and May 2013 were collected and analyzed retrospectively.There were 17 males and 9 females,with a mean age of 52 years (39-74 years),mean tumor size of 10.3 cm(7.2-16.5 cm),and mean R.E.N.A.L score of 7.5 (6-10).Patients'demographics,clinical characteristics,oncologic outcomes,renal function were reviewed.Results The renal masses were removed successfully and the surgical margins were negative.There were 21 (80.8％) cases of clear cell carcinoma,4 (15.4％) papillary carcinoma and 1 (3.8％) chromophobe carcinoma.The mean ischemia time was (28.3 ± 12.5) minutes (7 patients were clamp-free).Three patients needed transfusion,one experienced urine fistula and cured by conservative treatment,and one patient's renal function got progressive worsening and required long-term hemodialysis.The average serum creatinine was 121 μ mol/L before and 136 μmol/L after surgery (P =0.06).After a period of 22-47 months' follow-up,no patient had local recurrence or metastasis.Conclusions NSS can be safely performed and provide effective oncologic outcomes for selective patients with clinical T2 stage renal cell carcinomas.R.E.N.A.L nephrometry is an important factor and should be used to evaluate the feasibility of NSS.

Objective To investigate the efficacy and safety of radical nephrectomy associated with venous thrombectomy and the role of preoperative angioembolization.Methods From Sep 2006 to Dec 2014,the data from 15 cases with renal cell carcinoma and venous tumor thrombus were collected and analyzed retrospectively.The 15 patients included 8 men and 7 women,whose age ranged from 16 to 75 years.Before operation,all patients underwent imaging examinations which demonstrated the renal tumor and venous thrombus.The tumors size ranged from 5.4 to 14.5 cm.The levels of venous thrombus included 0 grade in 4 cases,Ⅰ grade in 2 cases,Ⅱ grade in 6 cases and Ⅲ grade in 3 cases.The 15 patients were divided into angioembolization group (n =5) and non-angioembolization group (n =10) according to the conduction of preoperative angioembolization.Results All cases successful accepted the nephrectomy.The venous thrombectomy were undergone in 14 cases except for one case due to the severe adhesion between renal vein and aorta.The average operative time was 243.3 ± 77.0 min.The mean blood loss was 1 373.3 ± 1 440.9 ml and the volume of blood transfusion was 533.3 ± 521.9 ml.The average time of postoperative hospital stay was 12.7 ± 5.2 days.Symptomatic tumor thrombus embolism didn't occur in all cases,perioperatively.There were no significant difference between these two groups in operative time,blood loss,blood transfusion volume and postoperative hospital stay (P ＞ 0.05).Eight cases were followed up with a period of 6 to 69 months.Four cases had disease-free survival during follow up.Two cases died at 30 and 55 months after surgery,respectively.One had tumor recurrence at 6 months after surgery.One patient accepted a 6-months target therapy (sunitinib) before surgery.However,his thrombus could not be removed during the operation.After the operation,he continued to choose the target drug therapy for 18 months.No progression for thrombosis or metastasis has been found.Conclusions Nephrectomy and venous thrombectomy could be safe and effective for renal cell carcinoma associated with venous thrombosis.Preoperative angioembolization could not reduce the perioperative risk such as blood loss.

A novel hydrogen peroxide sensor was fabricated by the seed-mediated growth method. First, polyethyleneimine(PEI) functionalized multiwalled carbon nanotubes(MWNTs) were used as growth scaffold on the glass carbon electrode ( GCE). Then, Au nanoparticles were electrodeposited uniformly as seeds. Finally, Pt nanoparticles ( PtNPs ) grew on Au nanoparticles to form Pt @ Au core-shell structure nanocomposite. A new type of electrochemical sensor based on Pt @ Au / PEI-MWNTs nanocomposites for detection of hydrogen peroxide was developed, and the designed Pt@ Au / PEI-MWNTs/ GCE was characterized by electrochemical methods and field emission scanning electron microscopy (FESEM). The Differential pulse experimental results showed that the modified electrode exhibited excellent electrocatalytic activity towards the reduction of H2 O2 with the wide linear range from 9. 2 ×10-8 mol/ L to 1. 3 ×10-3 mol/ L. The correlation coefficient was 0. 9994 and the low detection limit was 3. 1×10-8 mol/ L at the signal-to-noise of 3.

ObjectiveTo evaluate the clinical effect of post bladder sparing surgery intra-arterial chemotherapy combined with intravesical chemotherapy for the treatment of T1G3 bladder urothelial carcinoma.MethodsSeventy-four T1G3 bladder cancer patients were enrolled in this study.After bladder sparing surgery,22 patients received intra-arterial chemotherapy combined with intravesical chemotherapy,while the other 52 patients were treated with intravesical chemotherapy only.There was no significant difference between the 2 groups in sex,age,the size and number of bladder tumor and newly diagnosed cases (P ＞0.05).Twenty-two patients were treated with intra-arterial chemotherapy of piarubicin or epirubicin (40 -60 mg)+ cisplatin (60 -80 mg) 2 or 3 weeks after bladder sparing surgery,3 times as a cycle,repeat every 4 - 6 weeks.All the patients received the same protocol of intravesical chemotherapy.With a median follow-up of 32 months,effects of combination therapy group were compared with intravesical chemotherapy group in the aspects of tumor-specific death rates,recurrent rate,progressive rate,recurrent interval and the adverse reactions.ResultsThe tumor-specific death rates of combination therapy group and intravesical chemotherapy group were 0％ (0/22) and 13.5％ (7/52),respectively.There was no difference between the 2 groups (P =0.096).The recurrent rates were 13.6％ (3/22) and 46.2％ ( 24/52 ) ； The progressive rates were 0％ (0/22) and 21.2％ (11/52).There were significant differences between the 2 groups in recurrent rate (P =0.000) and progressive rate (P =0.048 ).The recurrent intervals of the 2 groups were 15 months and 6.5 months.During the interval of intra-arterial chemotherapy cycle,12 patients suffered 1 -2 degree nausea and vomit,2 patients suffered hypoleukemia,2 patients suffered neutropenia,4 patients'liver function was impaired and 1 patient's renal function was impaired.All the adverse reactions were minimal and reversible.ConclusionsIntra-arterial chemotherapy combined with intravesical chemotherapy is effective in preventing T1 G3 bladder cancer from recurrence and metastasis after bladder sparing surgery.The adverse reactions of this protocol were minimal and reversible.

Activation-induced cytidine deaminase (AID) is required for the generation of antibody diversity through initiating both somatic hypermutation (SHM) and class switch recombination. A few research groups have successfully used the feature of AID for generating mutant libraries in directed evolution of target proteins in B cells in vitro. B cells, cultured in suspension, are not convenient for transfection and cloning. In this study, we established an AID-based mutant accumulation and sorting system in adherent human cells. Mouse AID gene was first transfected into the human non-small cell lung carcinoma H1299 cells, and a stable cell clone (H1299-AID) was selected. Afterwards, anti-hTNF-α scFv (ATscFv) was transfected into H1299-AID cells and ATscFv was displayed on the surface of H1299-AID cells. By 4-round amplification/flow cytometric sorting for cells with the highest affinities to hTNF-alpha, two ATscFv mutant gene clones were isolated. Compared with the wild type ATscFv, the two mutants were much more efficient in neutralizing cytotoxicity of hTNF-alpha. The results indicate that directed evolution by somatic hypermutation can be carried out in adherent non-B cells, which makes directed evolution in mammalian cells easier and more efficient.
Animals ; Antibody Affinity ; Cells, Cultured ; Cytidine Deaminase ; genetics ; metabolism ; HEK293 Cells ; Humans ; Immunoglobulin Variable Region ; genetics ; immunology ; Mice ; Mutation ; Single-Chain Antibodies ; chemistry ; genetics ; immunology ; Somatic Hypermutation, Immunoglobulin ; genetics ; immunology ; Tumor Necrosis Factor-alpha ; immunology

Objective To discuss the feasibility and safety of retroperitoneal laparoscopic nephrectomy for treatment of kidney tuberculosis. Methods From March 2005 to February 2009, 28 patients with kidney tuberculosis underwent retroperitoneal laparoscopic nephrectomy. The patients′ data were reviewed and analyzed. Results There were 18 men and tencwomen with an average age of 36 (26-51) in the cohort. Sixteen patients had lesions on the left kidney and 12 on right kidney. All patients had a normal renal function on the contra lateral side. The severely impaired renal function of the lesion side was confirmed before operation. Anti-tuberculosis chemotherapy was administered to patients for two weeks to six months in advance of the surgery. No active lesion of tuberculosis was found and ESR level was normal before operation. All the operations were successfully performed without switching to open surgery. The average operative time was 170 (121-258) minutes, blood loss was 110 (70-250) ml and average postoperative hospital stay was 5.7 (5-14) days. Peritoneum injury was seen in three patients and incision infection in two patients. No severe complications were observed. Anti-tuberculosis chemotherapy was continued for three months. Twenty-four patients were followed-up, and the average follow-up time was 12.5 (6-20) months. All patients recovered without any lesion remaining. Conclusions Retroperitoneal laparoscopic nephrectomy could be a safe and reliable method for the treatment of non-functioning kidney due to tuberculosis.

ObjectiveTo explore the expression of novel protein kinase C ε (PKCε) in normal prostate (NP) tissue, benign prostate hyperplasia(BPH), peficancerous (PC) tissue and prostate cancer (Pca), and study its correlation with the grade and stage of Pca.MethodsTen NP slides, ten BPH slides, ten PC slides and 43 Pca slides were collected from our hospital. These slides were routinely proceased and analyzed according to the requirement of immunohistochemical staining. Tumors were classified according to the 2002 TNM staging system. The grading system used in the study was based on the Gleason grade.ResultsWe was found that the expression of PKCεs in Pca (27/43) were significantly higher than those in NP(1/10), BPH (0/10) and PC (2/10) tissue, and the difference was statistically significant ( P ＜0.05 ). With regard to grade of prostate cancer, the expression of PKCε in Pca with Gleason score ≥8 group (12/13) was higher than the Gleason score 2 -4 group (4/10) and the Gleason score 5 -7 group (11/20). The difference was statistically significant (P ＜ 0.05 ). Moreover, the T3 and T4 stages had a more positive rate (10/12 & 9/10) than the T1 and T2 stages( 1/6 &7/15). There is statistically significant difference between early and advanced stage of prostate cancer ( P ＜ 0. 05 ). Furthermore, the positive expression of PKCε in prostatic carcinoma samples increased significantly in the metastasis group (9/10)compared to the non-metastasis group ( 18/33 ) ( P ＜ 0. 05 ), but the difference was not statistically significant between the concentration of prostate-specific antigen in blood serum ( P ＞ 0. 05 ).Conclusions PKCε is expressed in prostate cancer, and it correlates with the grade and stage of prostate cancer. PKCε may be related to the origin and the development of Pca, and it may be used as a prognostic factor for Pca.

Objective To evaluate the feasibility of European Organization for Research and Treatment of Cancer (EORTC) risk tables in non-muscle invasive bladder cancer in Chinese patients.Methods A retrospective analysis was performed on the data from 185 patients with non-muscle invaaive urothelial bladder cancer from January 2003 to February 2009. Among the 185 patients, 128 patients were stage Ta compared with 57 patients who were stage T1. There were 87, 53 and 45 patients with grade G1, G2 and G3 respectively. Transurethral resection of the bladder tumor was performed on all the patients and all the patients received routine post-operative intravesical instillation. A telephone interview follow-up was conducted on all the patients, and the average follow-up period was 36 months. EORTC risk tables were used to calculate risk scores for recurrence and progression for each patient. The recurrence and progression rates of different risk groups were recorded and compared with the estimated rates by EORTC risk table. Statistical analysis was used for comparison. ResultsTotal 1-year recurrence rate and progression rate for these patients were 25.9% and 3.8% respectively. According to calculated values of the patients, the 1-year recurrence rates of Group 0, Group 1-4, Group 5-9, Group 10-17 were 10.4%(5/48), 21. 5%(14/65), 35. 2% (19/54), 55.6%(10/18), respectively. The 1-year progression rates of Group 0, Group 2-6, Group 7-13, Group 14-23 were 0% (0/43), 1.5% (1/67), 6. 7% (4/60), 13. 3% (2/15). There was no significant difference between the real rates and estimated rates of the EORTC risk tables (P＞0. 05). However,the 1-year recurrence and progression rates between the low risk group, the medium risk group and the high risk group showed significant differences respectively (P ＜ 0. 05 ). Conclusions The EORTC risk tables are feasible to evaluate the recurrence and progression risk of non-muscle invasive bladder cancer in the present cohort. Nevertheless, the long term value and feasibility need more research to confirm.

[Objective]This study was designed to determine growth inhibition of diallyl trisulfide(DATS)in human prostate cancer cells by inducing apoptosis and further to investigate the mechanism underlying such effect.[Methods]Growth inhibition by DATS was estimated by the tetrazolium(MTr)assay.Apoptosis induction in DATS-treated cells was assessed by fluorescence microscopy analysis of cells with condensed and segmented nuclei following staining with DAPI and flow cytometric analysis of cells with sub-G1 DNA content following staining with propidium iodide.Protein levels of apoptosis regulating proteins were determined using western blot.The activity of caspase-3 was measured using a colorimetric assay.[Result]DATS showed tumor growth inhibition in a time-and dose-dependent manner,IC_(50) of DATS was 14 μmol/L at 72 h.DATS evoked apoptosis as confirmed by cell morphology and by the analysis of flow cytometry.The expression of Bcl-2 and Bcl-xL,the apoptosis-suppressing proteins,was more down-regulated.The activity of caspase-3 was enhanced by DATS.[Conclusion]DATS inhibits growth of prostate cancer cells by inducing apoptosis in association with down-regulation of Bcl-2 and Bcl-xL and activation of caspase-3.