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  • Tsaur, Igor  (11)
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  • 1
    Language: English
    In: The Journal of Urology, April 2015, Vol.193(4), pp.e77-e77
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.juro.2015.02.278 Byline: Hendrik Borgmann, Jan-Henning Wolm, Michael Reiter, Kilian Gust, Stefan Vallo, Georg Bartsch, Roman Blaheta, Igor Tsaur, Axel Haferkamp Author Affiliation: Frankfurt, Germany Article Note: (footnote) Source of Funding: none
    Keywords: Medicine
    ISSN: 0022-5347
    E-ISSN: 1527-3792
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  • 2
    Language: English
    In: Cells, 01 September 2018, Vol.7(9), p.129
    Description: This study was designed to investigate whether epigenetic modulation by histone deacetylase (HDAC) inhibition might circumvent resistance towards the mechanistic target of rapamycin (mTOR) inhibitor temsirolimus in a prostate cancer cell model. Parental (par) and temsirolimus-resistant (res)...
    Keywords: Mtor ; Histone Deacetylase ; Prostate Cancer ; Integrins ; Adhesion ; Invasion ; Biology
    E-ISSN: 2073-4409
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  • 3
    Language: English
    In: Patient Preference and Adherence, 2016, Vol.10, p.2181(7)
    Description: PURPOSE: This study compares early complications after cystectomy and urinary diversion (UD) stratified by the surgical focus and case load of two different department chairpersons in a single institution in two time periods. Creating clear data about complications that can affect the quality of life is an important tool for patients to decide whether and where to perform this extensive surgery.HYPOTHESIS: A team of surgeons with a clear focus on pelvic surgery leads to lower complication rates in radical cystectomy.MATERIALS AND METHODS: Radical cystectomy was performed in two separate time periods under the patronage of two different chairmen in the same university hospital. The patient data were analyzed retrospectively and the complications 30 days after surgery were assessed using the Clavien-Dindo classification.RESULTS: Statistical analysis showed a significant difference in the severity of complications between the two time periods, A and B, in total (P〈0.001). When placing patients into subgroups, significantly more complications in period A were also seen concerning sex (male, P〈0.001; female, P=0.003), age (〈70 years, P〈0.001; 〉70 years, P≤50.001) tumor grade (low grade, P〈0.001; high grade, P≤0.001), and UD (ileal conduit, P〈0.001; neobladder, P〈0.001). In a multivariable analysis, age (P=0.031) and type of UD (P=0.028) were determined as independent predictors for complications in period A. When joining the two periods together, the type of UD (P=0.0417), age (P=0.041), and the time periods (A/B) (P〈0.001) show a significant association with the presence of complications.CONCLUSION: This study compares for the first time surgical complications in two time periods with different case load and surgical focus in one department. Categorization shows that patients should prefer radical cystectomy in centers of excellence or a high-volume hospital in order to keep complications at the lowest possible level and thus have the highest benefit for oncologic outcome and quality of life.
    Keywords: Medicine;
    ISSN: 1177-889X
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  • 4
    Language: English
    In: Patient preference and adherence, 2016, Vol.10, pp.2181-2187
    Description: This study compares early complications after cystectomy and urinary diversion (UD) stratified by the surgical focus and case load of two different department chairpersons in a single institution in two time periods. Creating clear data about complications that can affect the quality of life is an important tool for patients to decide whether and where to perform this extensive surgery. A team of surgeons with a clear focus on pelvic surgery leads to lower complication rates in radical cystectomy. Radical cystectomy was performed in two separate time periods under the patronage of two different chairmen in the same university hospital. The patient data were analyzed retrospectively and the complications 30 days after surgery were assessed using the Clavien-Dindo classification. Statistical analysis showed a significant difference in the severity of complications between the two time periods, A and B, in total (70 years, ≤0.001) tumor grade (low grade, 〈0.001; high grade, ≤0.001), and UD (ileal conduit, 〈0.001; neobladder, 〈0.001). In a multivariable analysis, age (=0.031) and type of UD (=0.028) were determined as independent predictors for complications in period A. When joining the two periods together, the type of UD (=0.0417), age (=0.041), and the time periods (A/B) (〈0.001) show a significant association with the presence of complications. This study compares for the first time surgical complications in two time periods with different case load and surgical focus in one department. Categorization shows that patients should prefer radical cystectomy in centers of excellence or a high-volume hospital in order to keep complications at the lowest possible level and thus have the highest benefit for oncologic outcome and quality of life.
    Keywords: Clavien–Dindo Classification ; Ud ; Early Complications ; High-Volume Period ; Low-Volume Period ; Radical Cystectomy ; Urinary Diversion
    ISSN: 1177-889X
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 5
    Language: English
    In: Investigational New Drugs, 2013, Vol.31(2), pp.265-272
    Description: Pharmacologic options for patients with castration-resistant prostate cancer are limited. It has been suggested that targeting intracellular molecules, which have been altered during neoplastic development, may slow tumor growth. Therefore, the growth-blocking potential of the histone deacetylase-inhibitor LBH589 and the multiple tyrosine kinase-inhibitor TKI258, applied alone or in combination, was investigated in a panel of prostate cancer cell lines. PC-3, DU-145 or LNCaP cells were treated with various concentrations of LBH589 and/or TKI258. Tumor cell growth, cell cycle regulating proteins, HDAC3- and HDAC4-expression and histone H3 and H4 acetylation were then evaluated by MTT assay and Western blotting. LBH589 dose-dependently blocked prostate cancer cell growth. In contrast, TKI258 did not down-regulate tumor cell growth up to a 1,000 nM dosage. LBH589 elevated histone H3 and H4 acetylation. The cell cycle regulators cyclin B, cyclin D1, cdk1 and cdk4 were down-regulated in PC-3, whereas the suppressor proteins p21 and p27 were up-regulated in LNCaP by LBH589. TKI258 up-regulated p27 in PC-3 or p21 in LNCaP and additionally elevated cyclin B, cyclin D1, cdk1 and cdk4 in both cell lines. Presumably, the increase in cyclin and cdk caused by TKI258 counteracts the benefit of p21 or p27 up-regulation, resulting in TKI258 non-responsiveness. The LBH589/TKI258-combination was not superior to the LBH589 single-drug use in terms of growth reduction. Obviously, TKI258 did not enhance the sensitivity of prostate cancer cells towards an HDAC based regimen. Therefore, the LBH589/TKI258-combination probably does not provide an optimum strategy in fighting advanced prostate cancer.
    Keywords: Prostate cancer ; LBH589 ; TKI258 ; Molecular therapy ; Tumor growth
    ISSN: 0167-6997
    E-ISSN: 1573-0646
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  • 6
    Language: English
    In: Scandinavian Journal of Urology, 04 July 2017, Vol.51(4), pp.342-344
    Keywords: Angiomyolipoma ; Flank Pain ; Kidney ; Selective Arterial Embolization ; Ureteral Stone ; Medicine
    ISSN: 2168-1805
    E-ISSN: 2168-1813
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  • 7
    Language: English
    In: Journal of Cancer Education, 2017, Vol.32(1), pp.135-140
    Description: Many patients diagnosed with cancer search for health information on the Web. We aimed to assess the quality and reliability of online health information on prostate cancer. Google, Yahoo, and Bing were searched for the term “prostate cancer.” After selecting the most frequented websites, quality was measured by DISCERN score, JAMA benchmark criteria, and presence of HONcode certification. Popularity was assessed by Alexa tool, while accessibility, usability, and reliability were investigated by LIDA tool. Readability was analyzed by Flesch-Kincaid Reading Grade Level and Automated Readability Index. All 13 selected websites were rated as being of high quality according to the DISCERN instrument (76.5 ± 2.6 out of 80 points). JAMA benchmark criteria were fulfilled by 87 % of websites, whereas only 37 % were certified by the HONcode. Median Alexa Traffic Rank was 2718 ranging from 7 to 679,038. Websites received 2.3 ± 0.5 daily pageviews per visitor and users spent an average of 2 min 58 s ± 39 sec on the website. Accessibility (92 ± 5 %) and usability (92 ± 3 %) scores were high and reliability (88 ± 8 %) moderate according to the LIDA tool. Flesch-Kincaid Grade Level was 7.9 ± 2.2, and Automated Readability Index was 7.5 ± 2.4, rating the websites as fairly difficult to read. In conclusion, quality, accessibility, and usability of websites on prostate cancer provided a high rating in the current analysis. These findings are encouraging in view of the growing frequency of patients’ access of health information online.
    Keywords: Prostatic neoplasms ; Internet ; Consumer health information ; Health services research ; Decision making
    ISSN: 0885-8195
    E-ISSN: 1543-0154
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  • 8
    In: Anti-Cancer Drugs, 2011, Vol.22(10), pp.1002-1009
    Description: Our aim was to analyze the impact of the histone deacetylase (HDAC)-inhibitor valproic acid (VPA) on bladder cancer cell growth in vitro. RT-4, TCCSUP, UMUC-3, and RT-112 bladder cancer cells were treated with VPA (0.125–1 mmol/l) without and with preincubation periods of 3 and 5 days. Controls remained untreated. Tumor cell growth, cell cycle progression, and cell cycle-regulating proteins were investigated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, flow cytometry, and western blotting, respectively. Effects of VPA on histone H3 and H4 acetylation and HDAC3 and HDAC4 were also determined. Without preincubation, no tumor cell growth reduction was observed with 0.125 and 0.25 mmol/l VPA in TCCSUP, UMUC-3, and RT-112 cells, whereas 0.5 and 1 mmol/l VPA diminished the cell number significantly. VPA (0.25 mmol/l) did exert tumor growth-blocking effects after a 3-day preincubation. To achieve antitumor effects with VPA (0.125 mmol/l), a 5-day preincubation was necessary. A 3-day or 5-day preincubation was also necessary to distinctly delay cell cycle progression, with maximum effects at VPA (1 mmol/l). After the 5-day preincubation, the cell cycle-regulating proteins cdk1, cdk2, cdk4, and cyclins B, D1, and E were reduced, whereas p27 was enhanced. Diminished HDAC3 and 4 expression induced by VPA was accompanied by elevated acetylation of H3 and H4. VPA exerted growth-blocking properties on a panel of bladder cancer cell lines, commensurate with dose and exposure time. Long-term application induced much stronger effects than did shorter application and should be considered when designing therapeutic strategies for treating bladder carcinoma.
    Keywords: Cell Cycle -- Drug Effects ; Histone Deacetylase Inhibitors -- Pharmacology ; Urinary Bladder Neoplasms -- Drug Therapy ; Valproic Acid -- Pharmacology;
    ISSN: 0959-4973
    E-ISSN: 14735741
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  • 9
    Language: English
    In: Journal of Clinical Oncology, 03/2015, Vol.33(7_suppl), pp.348-348
    ISSN: 0732-183X
    E-ISSN: 1527-7755
    Source: CrossRef
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  • 10
    Language: English
    In: Cancer Epidemiology, February 2018, Vol.52, pp.63-69
    Description: Incidence rates for urothelial carcinoma (UC) have been reported to differ between countries within the European Union (EU). Besides occupational exposure to chemicals, other substances such as tobacco and nitrite in groundwater have been identified as risk factors for UC. We investigated if regional differences in UC incidence rates are associated with agricultural, industrial and residential land use. Newly diagnosed cases of UC between 2003 and 2010 were included. Information within 364 administrative districts of Germany from 2004 for land use factors were obtained and calculated as a proportion of the total area of the respective administrative district and as a smoothed proportion. Furthermore, information on smoking habits was included in our analysis. Kulldorff spatial clustering was used to detect different clusters. A negative binomial model was used to test the spatial association between UC incidence as a ratio of observed versus expected incidence rates, land use and smoking habits. We identified 437,847,834 person years with 171,086 cases of UC. Cluster analysis revealed areas with higher incidence of UC than others (p = 0.0002). Multivariate analysis including significant pairwise interactions showed that the environmental factors were independently associated with UC (p 〈 0.001). The RR was 1.066 (95% CI 1.052–1.080), 1.066 (95% CI 1.042–1.089) and 1.067 (95% CI 1.045–1.093) for agricultural, industrial and residential areas, respectively, and 0.996 (95% CI 0.869–0.999) for the proportion of never smokers. This study displays regional differences in incidence of UC in Germany. Additionally, results suggest that socioeconomic factors based on agricultural, industrial and residential land use may be associated with UC incidence rates.
    Keywords: Environmental Exposure ; Socioeconomic Factor ; Smoking ; Incidence Rates ; Urothelial Carcinoma ; Medicine ; Public Health
    ISSN: 1877-7821
    E-ISSN: 1877-783X
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