Objective To study the effect of PIM-1 gene silence by RNA interference (RNAi) on the growth of human prostate cancer xenograft tumor in nude mice. Methods The xenograft tumor model of human prostate cancer was established by injecting PC-3 cells in armpits of 12 nude mice. After modeling, the nude mice were randomly divided into three groups: interference plasmid group (injecting with RNAi recombinant plasmid), empty plasmid group and negative control group (liposome every), 4 mice in each group. Mice were injected every 2 days for 5 times. The tumor volumes of xenografts were measured during experiment, and the curve of tumor growth was drawn accordingly. The quality of tumor was measured, and the inhibitory rate of tumor was calculated at the end of the experiments. The expression levels of PIM-1, c-MYC mRNA and protein in xenograft tumors were detected by real-time PCR and Western blot assay, respectively. Furthermore, immunohistochemistry staining was used to verify the expression of PIM-1. Results The xenograft tumor model of human prostate cancer was established successfully. The volume of tumor was significantly decreased 6 days after the injection treatment in interference plasmid group than that of empty plasmid group and negative control group. The effect of suppressing tumor growth was remarkable. The expression levels of PIM-1 mRNA and protein were down-regulated significantly in interference plasmid group than those of other two groups. The immunohistochemical staining of PIM-1 showed the same changes. There was no significant difference in c-MYC protein level between the three groups. But interestingly, the c-MYC mRNA level was significantly decreased in interference plasmid group than that of other two groups. Conclusion The silence of PIM-1 gene by RNAi recombinant plasmid can result a significant growth suppression of the human prostate cancer xenograft tumors in nude mice. The expression of c-MYC gene is down-regulated at translation level in the therapeutic group concomitantly. PIM-1 may be a promising target of gene therapy for prostate cancer.

Objective To investigate the diagnostic value of acridine orange fluorescene(AO-F) in bladder cancers. Methods One thousand and sixteen bladder cancer patients were reviewed retro-spectively. The positive-rates of AO-F in different stages, grades, size, quantity, position of tumors, hematuria and treatment ways were evaluated. Results The total positive rate of AO-F was 78.05 % (793/1016). The positive-rate was 74.69% (611/818) in superficial stage and 91.92% (182/198) in invasive bladder cancer, 67.24% (351/522) in grade Ⅰ and Ⅱ , 90. 37% (413/457) in grade Ⅲ. The percentage of positive AO-F was 80.30% (750/934) in patients with hematuria, 52.44% (43/82) in patients without hematuria. The percentage was 79.87% (710/889) when the tumor size was more than 2 cm, 65.35% (83/127) when size less than 2 cm. 83.07% (363/437) sample was positive in multiple tumors, 74.27% (430/579) in single tumor. The percentage was 77.21% (105/136) in tumors involving trigone or neck of bladder, 78.07% (687/880) in tumors without involving these re-gions. There was 69.68% (393/564) in treatment with TURBt, 87.87% (268/305) in partial resec-tion, 91.74% (100/109) in total resection. A good association was observed between stage, grade, hematuria appearance, tumor size, quantity of carcinoma, treatment way and AO-F positive-rate, and a linear correlation was present between grade, stage and positive cytology. There was no significant association between position of the tumor and AO-F positive-rate. Conclusions The function of AO-F is significant in diagnosis of bladder cancer.

Objective To construct the prostate-specific double gene expression vector pIRESPSMAe/p-TK-Cx43 and establish the foundation for experimental prostate cancer gene therapy research. Methods Cx43 gene was amplified and cloned into pMD19-T Simple vector. HSV-TK gene was then synthesized and cloned into multiple clone site (MCS) A of the eukaryotie vector plRES. The new plasmid was named plRES-TK: PSMAe/p was obtained and cloned into plRES-TK by replacing CMV promoter. The new plasmid was named plRES-PSMAe/p-TK; Fourth, Cx43 gene was cloned into the MCS B of pIRES-PSMAe/p-TK and the new plasmid was named pIRES-PSMAe/p-TK-Cx43.This plasmid was identified by double digestion with Sal Ⅰ/Not Ⅰ and sequenced; Finally, LNCaP cells were transfected by the plasmid plRES-PSMAe/p-TK-Cx43 and the mRNAs expression of HSV-TK gene and Cx43 gene was tested by RT-PCR. Results The plasmids synthesized in this experiment were double digested respectively and the specific bands of the inserted genes were confirmed by RTPCR. plRES-PSMAe/p-TK-Cx43 was in line with the expected design by DNA sequencing. The mRNAs of TK gene and Cx43 gene were expressed and successfully confirmed by RT-PCR after LNCaP cells transfected with pIRES-PSMAe/p-TK-Cx43. Conclusion Double gene expression vector pIRES-PSMAe/p-TK-Cx43 containing HSV-TK gene and Cx43 gene is constructed successfully.

Objective To investigate the value of the application of the fresh first morning midstream urine in cytological study of bladder cancer patients. Methods The results of the fresh first and second morning midstream urine cytological studies for 52 bladder cancer patients were analyzed.Continual three urine samples and single urine sample were treated as study objects respectively. The positive rates in different tumor stages and grades were evaluated. Results The positive rate of overall 52 patients was 78. 8 % (41/52) in fresh first morning midstream urine and 80. 8% ( 42 / 52) in the fresh second morning midstream urine. While in 156 single urine samples, the positive percentages were 56.4%(88/156) and 60. 9% (95/156). The positive rates of the fresh first and second morning midstream urine were 69.7% (23/33) and 72.7% (24/33) respectively in grade 1- 2 patients, and 44.4 % (44/99) and 48. 5 % (48/99) in 99 single urine samples. The positive rates of 42 non-muscle invasive bladder cancer patients were 73. 8% (31/42) and 76.2% (32/42) in the fresh first and second morning midstream urine, while in 126 single urine samples, the positive rates were 54.8% (69/126)and 57.1% (72/126). There were no significant differences between positive rate of the fresh first and second morning midstream urine in diagnosis of bladder cancer, low grade bladder cancer and nonmuscle invasive bladder cancer. Conclusion The fresh first morning midstream urine can be used for urine cytological study in the diagnosis of bladder cancer, even in the diagnosis of low stage and low grade bladder cancer.

BACKGROUNDIn recent years, the number of patients undergoing primary total knee arthroplasty in China has rapidly increased. However, the incidence of primary total knee arthroplasty is unknown. The purpose of this study was to investigate the sex, age and, annual incidence of primary total knee arthroplasty based on 3118 Chinese patients who underwent the procedure during the period of 2000 - 2011.

METHODSTotal knee arthroplasties were performed on 511 males and 2607 females in our hospital during the period of 2000 - 2011. The sex, age, and annual incidence of primary total knee arthroplasty were evaluated.

RESULTSThe annual incidence of primary total knee arthroplasty increased from 35 knees in 2000 to 681 knees in 2011. The average annual percentage increase in incidence was 33.2%. Females accounted for 83.2% of the patients who underwent primary total knee arthroplasty. In both males and females, the highest incidence was observed in the group aged 65 - 74 years.

CONCLUSIONSThis study demonstrated a rapid increase in the incidence of primary total knee arthroplasty in our Chinese study population. The sex and age incidence of primary total knee arthroplasty in our study population differed from those reported in Western populations.

Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Arthroplasty, Replacement, Knee ; statistics & numerical data ; Female ; Humans ; Incidence ; Male ; Middle Aged ; Osteoarthritis ; surgery ; Sex Distribution ; Young Adult

BACKGROUNDGastric cancer (GC) is the second leading cause of cancer mortality worldwide, and surgical resection is currently the only possible curative approach. Duodenal stump leakage is the most serious complication after radical gastrectomy, and optimal treatment is still lacking.

METHODSWe retrospectively reviewed 2034 cases of total or subtotal gastrectomy for GC from January 1995 to December 2009, including 465 cases of duodenal stump closure using purse-string suture (group A), 835 cases of duodenal stump treated with linear cutting stapler and seromuscular layer suture (group B), and 734 cases of duodenal stump closure using full-thickness and seromuscular layer suture (group C). We evaluated the surgical cost, operative time for duodenal stump closure, short-term postoperative complications, perioperative blood loss, and postoperative recovery.

RESULTSThere was no perioperative mortality in any group. Ninety-four postoperative (within 1 month) complications occurred: 18 abdominal bleeding, 14 anastomotic leakage, 15 abdominal infection, 36 wound infection, and 11 duodenal stump leakage. There was no significant difference among the groups in intra-abdominal hemorrhage, anastomotic leakage, abdominal infection and wound infection. No postoperative duodenal stump leakage occurred in group A, which had a significant difference compared with groups B and C (6 cases in group B and 5 cases in group C suffered duodenal stump leakage. P < 0.01). The surgical cost in groups A and C was significantly lower than in group B (P < 0.01), with no significant difference between groups A and C. The processing time for duodenal stump closure in groups A and B was significantly shorter than in group C (P < 0.01), with no significant difference between groups A and B. There was no significant difference in blood loss and postoperative recovery among the groups.

CONCLUSIONSDuodenal stump closure using purse-string suture seems to be a promising approach with shorter operative time, and lower cost and incidence of duodenal stump leakage in radical gastrectomy.

Aged ; Female ; Gastrectomy ; adverse effects ; methods ; Gastric Stump ; surgery ; Humans ; Male ; Middle Aged ; Postoperative Complications ; surgery ; Retrospective Studies ; Sutures

OBJECTIVEThe purpose of this study was to construct a pathway-based network using differentially expressed genes in prostate cancer (PCa) screened by cDNA microarray chips in domestic research to visualize the relations among the genes obtained from the microarray data, and identify the genes with significant influence on this network by statistical analysis. It also aimed to search for the genes that play key roles in the tumorigenesis of PCa, and probe into the molecular mechanism of PCa pathogenesis in Chinese men.

METHODSThe relevant domestic literature of recent years were reviewed to sum up differentially expressed genes in PCa according to the screened microarray data. The OMIM database was used to analyze the relations among these genes and build a network of biological pathway. Furthermore, a statistical method, namely node contraction, was employed to compare the importance of the key genes.

RESULTSAccording to the gene expression profiling data, there were 113 differentially expressed genes, 51 up-regulated and 62 down-regulated. A pathway-based network including 68 inter-related genes was constructed using the OMIM database. The importance of every key node was calculated using the method of node contraction, and 12 key genes were identified, incuding c-MYC, VEGF, HSPCA, TGFbeta1, RANTES, EGR1, etc, which probably played important roles in the pathogenesis and progression of prostate cancer.

CONCLUSIONWe applied bioinformatics to the analysis of the gene expression profiling data in China, constructed a network of the differentially expressed genes using the OMIM database and method of node contraction, appraised the importance of the key genes, and established a method for the overall analysis of the gene chip data, which have paved a new ground for further researches on the pathogenesis of prostate cancer in Chinese men.

Asian Continental Ancestry Group ; genetics ; Computational Biology ; methods ; Databases, Genetic ; Gene Expression Profiling ; Gene Expression Regulation, Neoplastic ; Humans ; Male ; Oligonucleotide Array Sequence Analysis ; Prostatic Neoplasms ; genetics ; metabolism

OBJECTIVETo observe the incidence, causes and deviation angle of axial offset in patients with fracture ununited treated by Ilizarov bone transport technology.

METHODSFrom January 2007 to December 2012, 10 patients with fracture ununited were treated by Ilizarov bone transport including 8 males and 2 females with an average age of (30.3 ± 10.6) years old ranging from 18 to 49 years old. The segment of bone defect involved upper tibial in 2 cases, medial tibia in 2 cases, lower tibial in 5 cases, upper femoral in 1 case. For Paley type of bone defect, 6 cases were type B1, 4 cases were B3. The incidence and deviation angle of axial offset after Ilizarov bone transport technology were observed and evaluated on bone result by Paley assessment.

RESULTSAll patients were followed up from 19 to 32 months with an average of (22.0 ± 5.6) months. Three cases were natural healed at fracture ends, the other 7 cases were healed after bone graft. The time of external fixator was 16 to 28 months. At the last follow-up, there were 3 cases occurred coronal angulation of angle 5° to 11° with an average of (8.7 ± 3.2). Sagittal angulation was in 4 cases, angle 6° to 9° with an average of (8.5 ± 2.1)°. There were 4 cases occurred axial offset. In the last follow-up, according to Paley evaluation criteria, osseous results were excellent in 7 cases, good in 3 cases; functional results were excellent in 6 cases, good in 4 cases.

CONCLUSIONAxial deviation after the Ilizarov bone transport treatment is relatively common, which will result in delayed healing of bone and poor limb alignment. In order to improve the bone healing, corresponding measurements should be taken to avoid or reduce the incidence of axial deviation during and after the operation.

Adolescent ; Adult ; Female ; Fracture Healing ; Fractures, Ununited ; surgery ; Humans ; Ilizarov Technique ; adverse effects ; Male ; Middle Aged

BACKGROUNDSeveral reports have shown the progression of articular cartilage degeneration after anterior cruciate ligament (ACL) reconstruction. No report has been published about the cartilage comparing changes after single-bundle (SB) and double-bundle (DB) ACL reconstructions. The purpose of this study was to evaluate the articular cartilage changes after SB and DB ACL reconstructions by second-look arthroscopy.

METHODSNinety-nine patients who received arthroscopic ACL reconstruction were retrospectively reviewed at an average of 14 months after reconstruction, 58 patients underwent SB ACL reconstruction and 41 patients underwent DB ACL reconstruction. Hamstring tendon autografts were used in all patients. Second-look arthroscopy was done in conjunction with the tibial staple fixation removal at least one year after the initial ACL reconstruction. Arthroscopic evaluation and grading of the articular cartilage degeneration for all patients were performed at the initial ACL reconstruction, and at the second-look arthroscopy.

RESULTSThe average cartilage degeneration at the patellofemoral joint (PFJ) was found significantly worsened after both SB and DB ACL reconstructions. This worsening were not seen at medial tibiofemoral joint (TFJ) and lateral TFJ. Grade II cartilage damage was the most common. At second-look arthroscopy, the average patellar cartilage degeneration was 1.14 ± 0.14 (at first look 0.52 ± 0.11) for the SB group, and 1.22 ± 0.15 (at first look 0.56 ± 0.12) for the DB group. The average trochlear cartilage degeneration was 1.05 ± 0.16 (at fist look 0.10 ± 0.06) and 0.66 ± 0.17 (at fist look 0.17 ± 0.09), respectively. The average patellar cartilage degeneration showed no significant difference in both groups. However, the average trochlea cartilage degeneration in DB group was significantly less than in SB group.

CONCLUSIONSPatellofemoral cartilage degeneration continued to aggravate after ACL reconstruction. DB ACL reconstruction could significantly decrease the trochlea cartilage degeneration compared with SB ACL reconstruction.

Adolescent ; Adult ; Anterior Cruciate Ligament ; surgery ; Anterior Cruciate Ligament Reconstruction ; methods ; Arthroscopy ; methods ; Cartilage, Articular ; surgery ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Second-Look Surgery ; methods ; Treatment Outcome ; Young Adult

BACKGROUNDAssessment of lymph node metastasis (LNM) is important in early gastric cancer (EGC) and affects treatment decisions. However, the relationship between clinicopathological characteristics and LNM in EGC remains unclear. This study therefore explored favorable predictors of LNM in EGC.

METHODSA total of 716 specimens from gastric cancer patients who underwent curative gastrectomy between 1996 and 2003 at Zhejiang Provincial People's Hospital were reviewed. Forty-five cases were EGC, and clinicopathological characteristics such as gender, age, tumor size, location, gross type, differentiation, invasion depth, and vessel involvement were assessed to identify predictive factors for LNM and survival time.

RESULTSThe overall cumulative 5-year survival rate of EGC patients was 88.92%. Among these, 22.4% developed LNM, which was associated with a poor 5-year survival rate of only 72.7%. Patients with tumors larger than 2 cm in diameters, with depth of tumor invasion to the submucosa, and with positive lymphatic or nerve involvement were also inclined to have poorer survival performances. EGC limited to the mucosa but poorly differentiated also had a high risk for LNM. Multivariate analysis identified lymphatic invasion and tumor size as independent prognosis factors related to survival in EGC patients.

CONCLUSIONSCareful planning is required in EGC patients at high risk of lymph node metastases. Endoscopic mucosal resection or endoscopic submucosal dissection and laparoscopic partial gastrectomy should be cautiously used in EGC, and curative gastrectomy including lymphatic dissection and postoperative adjuvant therapy might be considered to improve the prognosis.

Adult ; Aged ; Female ; Gastrectomy ; Humans ; Lymph Node Excision ; Lymphatic Metastasis ; Male ; Middle Aged ; Stomach Neoplasms ; mortality ; surgery ; Treatment Outcome