ABSTRACT
Objective The aim of this study was to compared the clinical effect of ureteroscopic holmium laser incision (USHLI) with that of ureteroscopic cold knife incision (USCKI) in the treatment of ureteral stricture. Methods Seventy-eight patients with ureteral stricture underwent USHLI (n = 40) or USCKI (n = 38) in the Armed Police Corps Hospital of Jiangsu Province from January 2010 to December 2016. Comparisons were made between the two surgical strategies in the operation time, postoperative complications, hospital days, short-term effect and long-term effect.Results Mild postoperative hematuria occurred in all the patients of the USHLI group, which lasted 1-2 days before it disappeared without intervention, but with no other severe complications as adjacent organ injury, ureteral avulsion, or massive hemorrhage. Moderate postoperative hematuria was observed in all the patients of the USCKI group, which was stopped at 2-3 days by administration of hemostatics. Compared with USCKI, USHLI achieved a significantly shorter operation time ([43.4 ± 5.8] vs [35.3 ± 3.8] min, P < 0.05) and postoperative hospital stay ([5.0 ± 1.4] vs [4.0 ± 0.8] d, P < 0.05), lower incidence of postoperative infection (27.3% vs 7.7%, P < 0.05), and higher cure rate (57.6% vs 87.2%, P < 0.05). Conclusion USHLI, with its advantages of less damage, lower recurrence rate and fewer complications, is obviously superior to USCKI in the treatment of ureteral stricture.
ABSTRACT
Objective: To investigate the effect of human bone marrow mesenchymal stem cells (MSCs) conditioned medium (CM) on cell growth of prostate cancer cell line PC-3. Methods: MSCs were isolated and culture-expanded by using density gradient centrifugation from a healthy adult. When the passage 3 (P3) culture reached 80% confluence, the medium was changed to fresh medium. After 24-hour incubation, the supernatant (MSCs-CM) was collected. Then the PC-3 cells were incubated in fresh medium alone (as the control group) or in the medium supplemented with 50% MSCs-CM (as the CM group). The ultrastructure of PC-3 cells was observed under a transmission electron microscope. The cell viability was measured by WST-8 assay, and the cell cycle was analyzed by flow cytometry (FCM). Results: On day 4, the nucleus to cytoplasm ratio was lower and the number of organelles was much more in PC-3 cells in the CM group than those in the control group. The WST-8 assay showed that the absorbance values (on day 1, 3, 5 and 7) of the CM group were significantly higher than those in the control group (P0.05). On day 4, the percentage of cells in G0/G1 phase was decreased while which in S+G2/M phase was increased in the CM group compared with those in the control group (56.20%±0.78% vs 68.54%±1.21%, P<0.01; 43.80%±0.77% vs 31.46%±1.20%, P<0.01). Conclusion: MSCs-CM can promote the proliferation of PC-3 cells through accelerating G 1 to S phase transition. Copyright© 2011 by TUMOR.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effects of prostate cancer cell line PC-3 conditioned medium (PC- 3-CM) on the proliferation and osteogenic differentiation of human bone marrow human basalis mesenchymal stem cells (hBMSCs).</p><p><b>METHODS</b>hBMSCs were isolated and culture-expanded by density gradient centrifugation from normal volunteers. PC-3 cells were cultured till the time of logarithmic growth and then transferred to a fresh medium, which, after 24 hours of incubation, was collected as PC-3-CM. Passage 3 hBMSCs were cultured in the fresh medium alone (the control group) or that with 50% PC-3-CM (the experimental group), and the effect of PC-3-CM on the proliferation activity of the hBMSCs was detected by WST-8 assay. Based on the types of medium used, the hBMSCs were divided into Groups I (control), II (50% PC-3-CM), III (osteoblast inducer) and IV (osteoblast inducer containing 50% PC-3 CM). The effects of PC-3-CM on the osteoblastic differentiation of the hBMSCs were determined by ALP staining, ALP activity detection, Von Kossa staining, and calcium quantitation.</p><p><b>RESULTS</b>At 1, 3, 5 and 7 days of incubation, the absorbance values of the cells in the experimental group were 0.4370 +/- 0.0285, 0.7980 +/- 0.0213, 1.9090 +/- 0.0612 and 2.3023 +/- 0.0610, and those in the control group were 0.4060 +/- 0.0223, 0.6643 +/- 0.0075, 1.3727 +/- 0.0176 and 1.7947 +/- 0.0115, respectively, with significant differences between the two groups (P < 0.01) except on day 1 (P > 0.05). The positive rate and intensity of ALP staining were gradually increased in the four groups, with the ALP activities of 0.29 +/- 0.03, 1.30 +/- 0.03, 2.13 +/- 0.08, and 3.80 +/- 0.03, respectively (P < 0.01), and so was the intensity of Von Kossa staining, with the calcium depositions of 0.04 +/- 0.01, 0.44 +/- 0.05, 0.98 +/- 0.03, and 1.27 +/- 0.04, respectively (P < 0.01).</p><p><b>CONCLUSION</b>PC-3- CM can promote the proliferation and osteogenic differentiation of human bone marrow mesenchymal stem cells.</p>
Subject(s)
Humans , Male , Bone Marrow Cells , Cell Biology , Cell Differentiation , Cell Line, Tumor , Cell Proliferation , Cells, Cultured , Culture Media, Conditioned , Pharmacology , Mesenchymal Stem Cells , Cell Biology , Osteoblasts , Cell Biology , Osteogenesis , Prostatic NeoplasmsABSTRACT
Objective: To investigate the effects of 5α - dihydrostestosterone (DHT) on calcium mobilization and growth of prostate cancer cell line LNCaP. Methods: Intracellular calcium concentration ([Ca2+]i) was assayed by MiraCal Image System using Fura-2/AM as Ca2+ fluorescence probe. Cell viability was observed by MTT assay and apoptosis by flow cytometry. Results: The calcium levels rapidly increased following addition of DHT, with the latency of response only in seconds. DHT at the concentrations of 1, 10, 100 and 1 000 nmol/L increased [Ca2+]i from (28±5), (29±5), (28±4) and (28±9) nmol/L to (31±3) (P>0.05,65±9) (P<0.01), (193±33) (P<0.001) and (208±42) nmol/L (P<0.001), respectively. The response induced by 1 000 nmol/L DHT was similar to that induced by 100 nmol/L DTH. DHT 1 000 nmol/L did not increase [Ca2+]i under extracellular Ca2+ -free condition. Blockers of L-type voltage-gated calcium channels, including verapamil (50 μmol/L), diltiazem (100 μmol/ L) or nifedipine (5 mmol/L) at 37°C for 5 min prior to stimulation with 1 000 nmol/L DHT, completely inhibited DHT-induced [Ca2+]i rise. Pre-treatment with inhibitor of phospholipase C such as neomycin sulfate (1 mmol/L) at 37°C for 3 min or inhibitor of ryanodine receptor such as procaine (50 mmol/L) at 37°C for 3 min had no influence on [Ca2+]i rise induced by 1 000 nmol/L DHT. The optical density (D) values and early apoptosis rates of the cells stimulated with 1 000 nmol/L DHT for 48 h were significantly different from those of cells pre-treated with verapamil prior to stimulation with 1 000 nmol/L DHT ([0.67±0.10]% vs [2.13±0.16] % and [14.31±2.29]% vs [1.07±0.19]%,P<0.01). Conclusion: DHT can induce rapid [Ca2+]i, rise in LNCaP cells in a concentration-dependent manner. The increase of [Ca2+]i, induced by DHT involves L-type voltage-gated calcium channels, but does not involve release of intracellular Ca2+ stores. The increase of [Ca2+]i induced by DHT increases apoptosis and inhibits growth of LNCaP cells.
ABSTRACT
The purpose of this study is to evaluate the therapeutic effect of radical prostatectomy combined with preoperative neoadjuvant hormonal ablation therapy for prostate cancer (PCa). In this study, a total of 31 patients with local PCa underwent radical prostatectomy; of these, 12 patients underwent preoperative hormonal deprivation with a combination of goserelin and flutamide for a period of 5.6 months. Data regarding clinical characteristics were compared between the neoadjuvant therapy and radical prostatectomy groups. A total of 31 patients received pelvic lymph node clearance, and the rate of positive lymph nodes was 12.9% (4/31). Serum prostate-specific antigen (PSA) was 8.9 +/- 1.2 microg L(-1) after the neoadjuvant therapy and 0.4 +/- 0.3 microg L(-1) one month after the radical prostatectomy. There were significant differences in the positive surgical margins, seminal vesicle invasion and lymph node metastasis between the neoadjuvant therapy group (n = 12) and the radical prostatectomy group (n = 19, P < 0.01). The resulsts indicates that preoperative hormonal deprivation induced by goserelin and flutamide can decrease clinical and pathological staging, but assessment of its influence on long-term prognosis requires further study.