Animals ; Corticosterone ; pharmacology ; Hippocampus ; drug effects ; physiology ; In Vitro Techniques ; Long-Term Potentiation ; drug effects ; physiology ; Male ; Rats ; Rats, Wistar

Objective To explore the expressions and significance of Yes-associated protein (YAP) and large tumor suppressor gene 1 ( LATS1 ) in renal clear cell carcinoma (RCCC).Methods There are 30 cases of RCCC,15 males and 15 females.The median age was 63 (36 - 77) years.There were 17 cases of stage Ⅰ - Ⅱ,13 cases of stage Ⅲ - Ⅳ.There were 8 cases well differentiated,13 cases moderately differentiated and 9 cases low differentiated.The expressions of YAP,LATS1 mRNA and proteins in 30 cases of RCCC and normal renal tissues were tested by RT-PCR and immunohistochemistry,and were analyzed with clinical data.ResultsThe expression level of YAP mRNA in RCCC was higher than that in normal renal tissues (0.569 ± 0.066 vs 0.515 ±0.068,P =0.003 ),and the level of LATS1 mRNA in RCCC was lower than that in normal renal tissues (0.454 ± 0.115 vs 0.514 ± 0.093,P =0.029 ).Thepositive rate of YAP proteins in RCCC was obviously higher than that in normal renal tissues (63.3％ vs 33.3％,P =0.020),and the positive rate of LATS1 proteins in RCCC was lower than that in normal renal tissues (46.7％ vs 76.7％,P =0.017).The positive rate of YAP proteins was 33.3％ in well differentiated tissues,61.5％ in moderately differentiated tissues and 88.9％ in low differentiated tissues ( P =0.018),and the positive rate of LATS1 proteins was 75.0％ in well differentiated tissues,53.8％ in moderately differentiated tissues and 11.1％ in low differentiated tissues (P =0.024).The positive rate of YAP proteins was 47.1％ in stage Ⅰ - Ⅱ and 84.6％ in stage Ⅲ - Ⅳ ( P =0.034 ),and the positive rate of LATS1 proteins was 64.7％ in stage Ⅰ - Ⅱ,23.1％ in stage Ⅲ - Ⅳ ( P =0.024 ).ConclusionYAP and LATS1 play important roles in the development of renal clear carcinoma,and may become new targets in the treatment of RCCC.

BACKGROUND:Ideal tissue-engineered urinary tract should have good mechanical properties to bear long-term attack of urine and excretion. Muscular conduit of urinary tract in static culture exerts poor strength. It is reported that mechanical stimuli promote cellular growth and secretion of extracellular matrix. OBJECTIVE:To investigate the feasibility of constructing tissue-engineered muscular conduit of urinary tract in bioreactor. METHODS:Adipose-derived stem cells were harvested by col agen enzyme method. After series culture and expansion in vitro, flow cytometric analysis was carried out to detect the immunophenotypes of adipose-derived stem cells. Then the cel-polyglycolic acid complex was constructed by seeding adipose-derived stem cells on polyglycolic acid fibers. After 1 week of in vitro culture, cel-polyglycolic acid complex was cultured in a bioreactor. The experimental group was subjected to pulsatile stimuli, while the control group was cultured in static state. After 3 weeks of in vitro culture in basic medium, the cel-polyglycolic acid complex was induced in the induced culture medium for 4 weeks, and then engineered tissue was examined both grossly and histological y. RESULTS AND CONCLUSION:Flow cytometry demonstrated that the adipose-derived stem cells expressed CD90 (99.42%), CD44 (98.12%) and CD105 (93.27%), but not CD34 (4.92%) or CD45 (0.38%). In the experimental group, tissue-engineered muscular conduit of urinary tract appeared bright color with a round lumen. Immunohistochemical staining showed that after cel-polyglycolic acid complex was induced for 4 weeks, the cells expressed desmin and α-smooth muscle actin. More col agen was found in the complex. In contrast, the control group appeared pale surface and its lumen col apsed slightly. Less col agen was in the complex. Tissue-engineered muscular conduit of urinary tract with good structure can be constructed in a bioreactor.

Objective To study the expression of PTEN,Fas and DCR3 in human gastric cancer and evaluate their effects on carcinogenesis,cell proliferation,invasion and metastasis of gastric carcinoma,as well as clinical significance.Methods The expression of PTEN,Fas and DCR3 were detected by immunohistochemical method (streptavidin-peroxidase) in the tissues of 75 primary gastric carcinomas and 15 gastric ulcers.Results The positive expression rate of DCR3 in gastric carcinoma tissues was significantly higher than that in normal tissues,and the expression of PTEN and Fas was obviously lower than that in normal tissues (P<0.01).The expression of DCR3 was negatively correlated with Fas and PTEN respectively (r=-0.720,P<0.001; r=-0.336,P<0.001).There was a positive correlation between PTEN and Fas.The expression of PTEN,Fas and DCR3 was closely correlated with lymph node metastasis,clinical stage,histological differentiation grade and tumor depth of gastric cancer,but not related to sex,age and tumor size (P>0.05).Conclusion PTEN,DCR3 and Fas have mutual restrictive relationships in the process of invasion and metastasis in gastric cancer.Detecting the expression of PTEN,Fas and DCR3 in gastric cancer is helpful to judge the malignant biological behavior of gastric cancer at a different angle,which may be considered as reliability index in clinic diagnosis,judging curative effect and monitoring the prognosis of gastric carcinoma.

OBJECTIVE: To study the changes of serum vascular endothelial growth factor (VEGF) and beta 2-microglobulin levels before and after radiotherapy in 58 patients with nasopharyngeal carcinoma (NPC), and to elucidate the clinical significance of VEGF and beta 2-microglobulin test before radiotherapy. METHODS: Serum VEGF level was measured by sandwich ELISA in 58 patients with NPC and 24 healthy individuals, and the serum beta 2-microglobulin was assayed with time-resolved fluoroimmunoassay. RESULTS: The serum VEGF level in patients with NPC was (174.0+/-130.0) ng/L, higher than (134.1+/-66.6) ng/L of the healthy subjects, but the difference was not significant (P>0.05). The serum VEGF level was higher in T4 and IV a patients with NPC. No significant differences in the levels of serum VEGF were found among various N classifications in the patients with NPC. Patients with the serum VEGF level higher than 267.3 ng/L (mean+2 s of the serum VEGF level in the healthy individuals) had a shorter metastasis-free survival time (P<0.05). Although the patients with high beta 2-microglobulin level had a shorter survival time, the difference was not significant. CONCLUSION: The NPC patients with high serum VEGF level have a poor prognosis.

Objective To evaluate a kind of operative management in the treatment of chronic non bacterial prostatitis. Methods From 1992 to 1999,cross incision of the prostatic capsule and bladder neck plasty were performed for 102 cases of chronic non bacterial prostatitis. Results The effective rate is 85.3% (87/102).It was 92.6% for the prostatitis of obstructive type (63/68) and 70.6% for patients complained of pain (24/34).43 cases have been followed up for an average of 4.5 years of which the outcome has been satisfactory in 36 and noneffective in 7. Conclusions The operative management for chronic non bacterial prostatitis is effective,safe,with less damage and less complication.

Objective To evaluate the clinical application and mid-term result of Gore-Tex suture as an artificial chordae in mitral anterior leaflet valvuloplasty. Methods 38 patients with the anterior leaflet received surgery. The data of the cardiac function (EF), the diameter of left ventricular and left atria and the degree of mitral regurgitation were analyzed before and after operation. Results The degree of mitral regurgitation decreased significantly after operation. The mean degree of pre-operation mitral regurgitation was (3.76?0.43) +, and after surgery was (1.08?0.99)+,P

OBJECTIVE To assess the value and limitation of the ultrasonography in diagnosis of vocal cord paralysis(VCP).METHODS We analyzed the ultrasound images of 33 patients with VCP,which were confirmed by laryngoscope.RESULTS Among the 33 cases,30 with unilateral VCPs were shown with ultrasound,having the vocal cords with distortion(n=18)and reduced movement or immobilization(n=27),enlarged fissure of the glottis(n=19),arytenoid cartilage with reduced movement or immobilization(n=30),distended piriform sinus(n=25),and posterior cricoarytenoid muscle with increased echogenicity and decreased thickness(n=10);3 with bilateral VCPs were diagnosed in ultrasound examination,all of which had distortion of vocal cord,enlarged fissure of glottis,and reduced movement of arytenoid cartilages.Ultrasonographic appearances were correlated with laryngoscope findings,with consistency rates of 93.9% for VCPs.CONCLUSION Ultrasonography,in particular observing movement of arytenoid cartilages,could be a non-invasive and effective alternative method in diagnosis of VCP.

Radionuclide imaging was widely used in the diagnosis and treatment of skeletal diseases.It is of early diagnostic value in metastatic osteosarcoma，osteomyelitis and Paget's disease,and early affirmative value in vitality of transplanted bone.It also demonstrates a significant analgesic effect on theosteosarcoma and metastatic osteosarcoma.

BACKGROUND:Percutaneous vertebroplasty, percutaneous kyphoplasty and expandable pedicle screw fixation can treat primary osteoporotic thoracolumbar fractures. The three methods have their own advantages and disadvantages. OBJECTIVE:To investigate the methods and clinical effects of primary osteoporotic thoracolumbar fractures. METHODS:Clinical data of 61 patients with primary osteoporotic thoracolumbar fractures were col ected and retrospectively analyzed. Perioperative preparation must be done. Al patients were treated by percutaneous vertebroplasty, percutaneous kyphoplasty and expansive pedicle screw fixation. We recorded Visual Analogue Scale (VAS) and the Oswestry Disability Index (ODI) before treatment, 3 months after treatment, as wel as sagittal index (SI) and Cobb angle of vertebral fracture before treatment, 3 days and 3 months after treatment. RESULTS AND CONCLUSION:(1) Al cases were fol owed up for 12-18 months. (2) There was no significant difference in VAS scores, ODI, SI and Cobb angle of vertebral fracture among the three groups of patients preoperatively. (3) At 3 months after treatment, there were significant differences in VAS scores and ODI in the three groups as compared with that preoperation (P<0.05). However, no significant difference in VAS and ODI was determined among intergroup comparison (P>0.05). (4) SI and Cobb angle of vertebral fracture were significantly increased;the difference was statistical y significant (P<0.05). The efficacy was similar between the percutaneous kyphoplasty and expansive pedicle screw fixation groups (P>0.05), and was better than the percutaneous vertebroplasty group (P<0.05). (5) Three kinds of treatment can effectively restore the vertebral height and intensity, relieve pain and stabilize the spine, and no significant vertebral compression was found in the short term. However, restoration of postoperative vertebral height was better in percutaneous kyphoplasty and expansive pedicle screw fixation groups than in the percutaneous vertebroplasty group. In view of their respective indications, advantages and disadvantages, the key point of raising therapeutic effect was to choose appropriate surgical procedures.