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Wu CL, Ping SY, Yu CP, Yu DS. Tyrosine kinase receptor inhibitor-targeted combined chemotherapy for metastatic bladder cancer. Kaohsiung J Med Sci 2012; 28:194-203. [DOI: 10.1016/j.kjms.2011.06.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Accepted: 12/13/2010] [Indexed: 11/29/2022] Open
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Ping SY, Shen KH, Yu DS. Epigenetic regulation of vascular endothelial growth factor a dynamic expression in transitional cell carcinoma. Mol Carcinog 2012; 52:568-79. [PMID: 22392726 DOI: 10.1002/mc.21892] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 01/30/2012] [Accepted: 02/06/2012] [Indexed: 11/11/2022]
Abstract
Vascular endothelial growth factor A (VEGF-A) is a key mediator in the neovascularization of cancers. We have found that VEGF-A was expressed at significantly higher levels in high-grade transitional cell carcinoma (TCC) cells than low-grade TCC cells in our previous study. In the present study, promoter methylation pattern was assessed and quantified by bisulfite genomic sequencing (BGS) and specific VEGF-A CpG sites in low-grade, but not in high-grade, TCC cells were observed. Reporter assays indicated that hypermethylation of nine CpG sites can inhibit the transcriptional activity of the VEGF-A gene. Subsequent chromatin immunoprecipitation (ChIP) assay revealed down-regulation of transcription activity of VEGF-A with increasing binding of methyl-CpG-binding protein 2 (MBD2) and trimethyl-histone H3 (Lys9) proteins to these CpG sites in low-grade TCC cells during hypermethylation. Furthermore, treatment of low-grade TCC cells with DNA methyltransferase inhibitor and histone deacetylase inhibitor can restore the expression of VEGF-A and promote the invasive ability of low-grade TCC cells. Hypermethylation with lower expression levels of VEGF-A in low-grade TCC tumors than high-grade TCC tumors was also confirmed in clinical specimens by reverse transcriptase-PCR and pyrosequencing analyses. Our findings are the first results indicating that VEGF-A expression is suppressed in low-grade TCC tumors by promoter hypermethylation. This offers a new perspective on the role of VEGF-A in TCC tumor behavior.
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Meng E, Young JS, Cha TL, Sun GH, Yu DS, Brading AF. Neuronal-derived nitric oxide modulates the activity of mouse detrusor smooth muscle. Neurourol Urodyn 2012; 31:572-8. [PMID: 22275213 DOI: 10.1002/nau.21247] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Accepted: 11/07/2011] [Indexed: 11/10/2022]
Abstract
AIMS We investigated the roles of neuronal-derived nitric oxide (NO) in the modulation of spontaneous activity of mouse detrusor smooth muscle. METHODS Detrusor smooth muscle strips were isolated from nNOS gene knock-out (nNOS(-/-) ) mice and their wild type siblings (nNOS(+/+) ). The properties of smooth muscle cells were assessed using intracellular electrophysiology and Ca(2+) imaging by laser-scanning confocal microscopy. The effects of an nNOS inhibitor, 7-nitro indazole (7-NI) on electrically evoked contractility were assessed using nNOS(+/+) mouse detrusor strips. RESULTS In spontaneously active cells, the frequency of spontaneous action potentials (sAPs) and whole cell Ca(2+) flashes in nNOS(-/-) preparations was lower than that in the nNOS(+/+) preparations. The frequency of sAPs was enhanced by a nitric oxide donor, diethylamine NONOate sodium salt (NONOate; 100 µM), both when used alone and when the cGMP pathway was blocked by 1H-[1,2,4] oxadiazolo [4,3-a] quinoxalin-1-one (ODQ, 10 µM). 7-NI (100 µM) significantly suppressed the electrically evoked contraction of mouse detrusor strips. CONCLUSIONS We suggest that neuronal-derived NO facilitates the generation of spontaneous activity via a cGMP-independent pathway, and consequently enhances the evoked contraction of detrusor. Dysregulation of nNOS containing nerves may underlie bladder pathologies.
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Meng E, Chang HY, Chang SY, Sun GH, Yu DS, Cha TL. Involvement of Purinergic Neurotransmission in Ketamine Induced Bladder Dysfunction. J Urol 2011; 186:1134-41. [PMID: 21784472 DOI: 10.1016/j.juro.2011.04.102] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Indexed: 11/16/2022]
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Chen YH, Chang CY, Wang YH, Wen CC, Chen YC, Hu SC, Yu DS, Chen YH. Embryonic exposure to diclofenac disturbs actin organization and leads to myofibril misalignment. ACTA ACUST UNITED AC 2011; 92:139-47. [DOI: 10.1002/bdrb.20292] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Accepted: 02/14/2011] [Indexed: 11/12/2022]
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Yu DS, Ping SY, Wu CL, Chen HI, Chang SY, Ma CP. The Feasibility of BCG and Sunitinib Combination Therapy for Transitional Cell Carcinoma. UROLOGICAL SCIENCE 2011. [DOI: 10.1016/s1879-5226(11)60004-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kao CC, Wu CJ, Sun GH, Yu DS, Chen HI, Chang SY, Ma CP, Cha TL. Congenital Seminal Vesicle Cyst Associated with Ipsilateral Renal Agenesis Mimicking Bladder Outlet Obstruction: A Case Report and Review of the Literature. Kaohsiung J Med Sci 2010; 26:30-4. [DOI: 10.1016/s1607-551x(10)70005-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Tsai TH, Cha TL, Lin CM, Tsao CW, Tang SH, Chuang FP, Wu ST, Sun GH, Yu DS, Chang SY. Ketamine-associated bladder dysfunction. Int J Urol 2009; 16:826-9. [DOI: 10.1111/j.1442-2042.2009.02361.x] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tsao CW, Hsu CY, Chou YC, Wu ST, Sun GH, Yu DS, Fan PL, Chen HI, Chang SY, Cha TL. The relationship between varicoceles and obesity in a young adult population. ACTA ACUST UNITED AC 2009; 32:385-90. [DOI: 10.1111/j.1365-2605.2008.00926.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tsai TH, Tang SH, Chuang FP, Wu ST, Sun GH, Yu DS, Chang SY, Cha TL. Ipsilateral Synchronous Neoplasms of Kidney Presenting as Acute Pyelonephritis and Bladder Metastasis. Urology 2009; 73:1163.e9-11. [DOI: 10.1016/j.urology.2008.03.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Revised: 03/15/2008] [Accepted: 03/31/2008] [Indexed: 11/26/2022]
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Cha TL, Chuang MJ, Wu ST, Sun GH, Chang SY, Yu DS, Huang SM, Huan SKH, Cheng TC, Chen TT, Fan PL, Hsiao PW. Dual Degradation of Aurora A and B Kinases by the Histone Deacetylase Inhibitor LBH589 Induces G2-M Arrest and Apoptosis of Renal Cancer Cells. Clin Cancer Res 2009; 15:840-50. [DOI: 10.1158/1078-0432.ccr-08-1918] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ping SY, Hour TC, Lin SR, Yu DS. Taxol synergizes with antioxidants in inhibiting hormal refractory prostate cancer cell growth. Urol Oncol 2008; 28:170-9. [PMID: 18818108 DOI: 10.1016/j.urolonc.2008.07.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Accepted: 07/10/2008] [Indexed: 11/28/2022]
Abstract
Taxanes are chemotherapeutic agents commonly used to treat various carcinomas. Dietary antioxidants, such as vitamin E, green tea extracts, and isoflavones have been used against prostate cancer, and exhibit anticancer effects both in vitro and in vivo. We evaluated the combined effect of taxol (paclitaxel) with pyrrolidine dithiocarbamate, vitamin E, epigallocatechin gallate, and genistein in killing hormone-refractory prostate cancer cells. Those agents were tested on the hormone-refractory prostate cancer cell line PC-3, and the viability of the cells was determined using MTT {3 (4, 5-dimethylthiazo-2-yl)-2, 5-diphenyl tetrazolium} assay after drug treatment. PC-3 cells were sensitive to these drugs with 50% inhibitory concentrations of 0.1, 23, 220, 1122, and 260 microM, for taxol, pyrrolidine dithiocarbamate, epigallocatechin gallate, genistein, and vitamin E, respectively. Genistein, pyrrolidine dithiocarbamate, and epigallocatechin gallate showed synergistic cytotoxicity to PC-3 cells when combined with 0.01 microM taxol. Only high concentration of vitamin E showed a synergistic effect with this dose of taxol. Further study revealed that 3 combinations could induce sub-G1 phase of cell cycle, induce apoptosis, and increase caspase activity and decrease Bcl-2 expression simultaneously. In conclusion, in addition to vitamin E, incorporation of these antioxidants with taxan-based cytotoxic therapies offers encouraging strategies for combating hormone-refractory prostate cancers.
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Wu ST, Tsui KH, Tang SH, Char DL, Yu DS, Yen CY, Chang SY, Chen HI, Sun GH. Laparoscopic radical prostatectomy: initial experience of robotic surgery in Taiwan. Anticancer Res 2008; 28:1989-1992. [PMID: 18649737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND The incidence of prostate cancer is lower in Taiwan compared to Europe and North America. Only a few urologists have been trained to perform laparoscopic radical prostatectomies (LRP). The initial experience of robotic LRP in Taiwan is reported. PATIENTS AND METHODS Twenty-four patients with localized prostate carcinomas underwent robotic LRP between November 2004 and December 2006. Data collection included basic demographics, prostate specific antigen (PSA), stages, Gleason scores, operative time, estimated blood loss (EBL), catheterization time, pathology, complications and return of continence. RESULTS The mean operative time was 310 minutes, the mean EBL was 234 mL and the average urethral catheterization time was 7.1 days. Three patients had a total of three complications. Continence was 20.8% at one week, 59.1% at six weeks and 75% at three months postoperatively. CONCLUSION Our initial experience with robotic LRP indicated that the procedure was safe and effective. Six case experiences were required to establish a standard operating procedure. Eighteen operations were needed to complete the learning curve and achieve stable results.
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Zhao DM, Wang YX, Chen ZY, Xu RW, Wu G, Yu DS. Preparation and characterization of modified hydroxyapatite particles by heparin. Biomed Mater 2008; 3:025016. [DOI: 10.1088/1748-6041/3/2/025016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yu DS, Lee CF, Chen HI, Chang SY. Bladder wall grafting in rats using salt-modified and collagen-coated polycaprolactone scaffolds: preliminary report. Int J Urol 2008; 14:939-44. [PMID: 17880294 DOI: 10.1111/j.1442-2042.2007.01871.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM A rat model was used for the evaluation of collagen-coated and salt-modified polycaprolactone (PCL) scaffolds for bladder grafting after hemicystectomy. METHODS SD rats underwent partial cystectomy and cystoplasty with collagen-coated and salt-modified polycaprolactone scaffolds. The grafts of the regenerated bladder wall were harvested at different intervals and tissue regeneration was evaluated microscopically. Anatomic and functional characters were evaluated by cystography and urodynamics. RESULTS At harvesting, after 1 and 2 months, we found good preservation of the bladder shape and volume in all 16 rats receiving PCL cystorrhaphy. No stone formation was observed. Good epithelialization and ingrowth of smooth muscle cells were seen after 2 months grafting. Collagen-coated PCL scaffolds showed considerable encrustation, which appeared to be absorbed and disappear with time. The cystographic and urodynamic examinations revealed intact contour and a well-accommodated bladder with reservoir volume and contractility. CONCLUSIONS In the rat model, we have successfully demonstrated the applicability of collagen coated and salt-modified PCL in reconstruction of the partial cystectomized bladder.
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Kim HS, Kim JW, Yu DS. Semicircular (Tenzel) flap for malignant melanoma involving the palpebral conjunctiva and skin of an eyelid. J Eur Acad Dermatol Venereol 2007; 22:102-3. [PMID: 18005025 DOI: 10.1111/j.1468-3083.2007.02166.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yu DS, Shi XZ, Wang HJ, Sun WX, Chen JM, Liu QH, Zhao YC. Regional patterns of soil organic carbon stocks in China. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2007; 85:680-9. [PMID: 17126986 DOI: 10.1016/j.jenvman.2006.09.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2005] [Revised: 09/08/2006] [Accepted: 09/19/2006] [Indexed: 05/12/2023]
Abstract
Soil organic carbon (SOC) is of great importance in the global carbon cycle. Distribution patterns of SOC in various regions of China constitute a nation-wide baseline for studies on soil carbon changes. This paper presents an integrated and multi-level study on SOC stock patterns of China, and presents baseline SOC stock estimates by great administrative regions, river watersheds, soil type regions and ecosystem. The assignment is done by means of a recently completed 1: 1,000,000 scale soil database of China, which is the most detailed and reliable one in China at the present time. SOC densities of 7292 soil profiles collected across China in the middle of the 1980s were calculated and then linked to corresponding polygons in a digital soil map, resulting in a SOC Density Map of China on a 1: 1,000,000 scale, and a 1 km x 1 km grid map. Corresponding maps of administrative regions, river watersheds, soil types (ST), and ecosystems in China were also prepared with an identical resolution and coordinate control points, allowing GIS analyses. Results show that soils in China cover an area of 9.281 x 10(6)km(2) in total, with a total SOC stock of 89.14 Pg (1 Pg=10(15)g) and a mean SOC density of 96.0 t C/ha. Confidence limits of the SOC stock and density in China are estimated as [89.23 Pg, 89.08 Pg] and [96.143 t C/ha, 95.981 t C/ha] at 95% probability, respectively. The largest total SOC stock (23.60 Pg) is found in South-west China while the highest mean SOC density (181.9 t C/ha) is found in north-east China. The total SOC stock and the mean SOC density in the Yangtze river watershed are 21.05 Pg and 120.0 t C/ha, respectively, while the corresponding figures in the Yellow river watershed are 8.46 Pg and 104.3 t C/ha, respectively. The highest total SOC stocks are found in Inceptisols (34.39 Pg) with SOC density of 102.8 t C/ha. The lowest and highest mean SOC densities are found on Entisols (28.1 t C/ha), and on Histosols (994.728.1 t C/ha), respectively. Finally, the total SOC stock in shrub and forest ecosystem classes are 25.55 and 21.50 Pg, respectively; the highest mean SOC density (209.9 t C/ha) was recorded in the wetland ecosystem class and the lowest (29.0 t C/ha) in the desert ecosystem class. Among five forest ecosystem types, Evergreen conifer forest stores the highest SOC stock (6.81 Pg), and Deciduous conifer forest shows the highest SOC density (225.9 t C/ha). Figures of SOC stocks stratified by Administrative regions, river watersheds, soil types and ecosystem types presented in the study may constitute national-wide baseline for studies of SOC stock changes in various regions in the future.
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Yu DS. Bladder wall grafting in rats using salt-modified and collagen-coated polycaprolactone scaffolds: Preliminary report. Int J Urol 2007. [DOI: 10.1111/j.1442-2042.2007.01872.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kim MH, Cho D, Kim HJ, Chong SJ, Lee KH, Yu DS, Park CJ, Lee JY, Cho BK, Park HJ. Investigation of the corticotropin-releasing hormone-proopiomelanocortin axis in various skin tumours. Br J Dermatol 2007; 155:910-5. [PMID: 17034518 DOI: 10.1111/j.1365-2133.2006.07442.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Various types of external stress cause the skin and central neuroendocrine system to express corticotropin-releasing hormone (CRH)-proopiomelanocortin (POMC) axis-related hormones. However, the precise role of the CRH-POMC axis-related hormones in various skin tumours is unclear. OBJECTIVES This study examined expression patterns of the CRH-POMC axis-related hormones in skin tumours. METHODS The production of CRH, adrenocorticotropic hormone (ACTH) and alpha-melanocyte-stimulating hormone (alpha-MSH) in various tumour cell lines including HaCaT and primary keratinocytes was examined using an enzyme-linked immunosorbent assay. Immunohistochemical analysis of the skin tumours was also performed. RESULTS CRH, ACTH and alpha-MSH were strongly expressed in malignant skin tumour cell lines such as G-361 and DX-3 (both malignant melanoma, MM). However, normal and haematological malignancy cell lines did not express the CRH-POMC axis-related hormones. Immunohistochemical analysis of the skin tumours showed that MM (80%), squamous cell carcinoma (SCC, 70%) and basal cell carcinoma (BCC, 10%) had strong immunoreactivity (++/+++) for CRH. Strong ACTH and alpha-MSH expression was observed in MM (70% and 50%, respectively), SCC (80% and 60%, respectively) and BCC (70% and 50%, respectively). CONCLUSIONS We report that an increase in the level of the CRH-POMC axis-related hormones is associated with malignant skin tumours such as MM. These results highlight the importance of the CRH-POMC axis-related hormones in the malignant tendency of skin tumours.
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Kim HS, Yu DS, Kim JW. A case of febrile ulceronecrotic Mucha-Habermann's disease successfully treated with oral cyclosporin. J Eur Acad Dermatol Venereol 2007; 21:272-3. [PMID: 17243979 DOI: 10.1111/j.1468-3083.2006.01843.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yu DS, Lee CF, Chang SY. Immunotherapy for Orthotopic Murine Bladder Cancer Using Bacillus Calmette-Guerin Recombinant Protein Mpt-64. J Urol 2007; 177:738-42. [PMID: 17222673 DOI: 10.1016/j.juro.2006.09.074] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2005] [Indexed: 11/30/2022]
Abstract
PURPOSE We investigated the efficacy of the recombinant bacillus Calmette-Guerin subunit protein vaccine Mpt-64 for inducing cytokine production and suppressing orthotopic bladder tumor growth in mice. MATERIALS AND METHODS One mycobacteria candidate gene (Mpt-64) was cloned and ligated into eukaryotic expression vectors. The induction and efficiency of Mpt-64 protein expression were detected using Western blotting. Various doses of Mpt-64 proteins were instilled intravesically 6 times in 2 weeks after intravesical implantation of MBT-2 tumor cells in chemical injured urothelium. Systemic cytokine responses, tumor growth and cumulative survival rates were monitored. RESULTS In vitro expression of recombinant Mpt-64 subunit protein was efficient in our system. Mice treated with 100 and 200 microg Mpt-64 subunit proteins significantly inhibited orthotopic MBT-2 tumor growth in C3H/HeN mice compared with that in control and 50 microg treatment groups in terms of the tumor taking rate, bladder tumor burden and mortality rate. Meanwhile, marked increased serum interferon-gamma with a limited but significant increase in serum interleukin-2 was observed in mice treated with 100 and 200 microg Mpt-64 proteins compared with control and 50 microg treated groups. CONCLUSIONS A highly immunopotent recombinant Mpt-64 subunit protein of bacillus Calmette-Guerin was produced and it elicited immune responses with a high serum interferon-gamma level, inhibited orthotopic tumor growth and prolonged survival in tumor bearing mice. Thus, intravesical immunogenic therapy using recombinant Mpt-64 protein may be an alternative bacillus Calmette-Guerin regimen for superficial bladder cancer.
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