Igor Tsaur

Dr. Igor Tsaur

Department and Outpatient Clinic for Urology and Pediatric Urology, University Medical Center of Johannes Gutenberg University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
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Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 December 2020 in Cells
Verified
Journal Article
Open access
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FZFuguang Zhao
Fuguang Zhao
OVOlesya Vakhrusheva
Olesya Vakhrusheva
SMSascha Markowitsch
Sascha Markowitsch
KSKimberly Slade
Kimberly Slade
Igor TsaurIgor Tsaur
Igor Tsaur
EJEva Juengel
Eva Juengel
Cisplatin, which induces DNA damage, is standard chemotherapy for advanced bladder cancer (BCa). However, efficacy is limited due to resistance development. Since artesunate (ART), a derivative of artemisinin originating from Traditional Chinese Medicine, has been shown to exhibit anti-tumor activity, and to inhibit DNA damage repair, the impact of artesunate on cisplatin-resistant BCa was evaluated. Cisplatin-sensitive (parental) and cisplatin-resistant BCa cells, RT4, RT112, T24, and TCCSup, were treated with ART (1–100 µM). Cell growth, proliferation, and cell cycle phases were investigated, as were apoptosis, necrosis, ferroptosis, autophagy, metabolic activity, and protein expression. Exposure to ART induced a time- and dose-dependent significant inhibition of tumor cell growth and proliferation of parental and cisplatin-resistant BCa cells. This inhibition was accompanied by a G0/G1 phase arrest and modulation of cell cycle regulating proteins. ART induced apoptos is by enhancing DNA damage, especially in the resistant cells. ART did not induce ferroptosis, but led to a disturbance of mitochondrial respiration and ATP generation. This impairment correlated with autophagy accompanied by a decrease in LC3B-I and an increase in LC3B-II. Since ART significantly inhibits proliferative and metabolic aspects of cisplatin-sensitive and cisplatin-resistant BCa cells, it may hold potential in treating advanced and therapy-resistant BCa.

20 February 2021 in Cancers
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Journal Article
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SMSascha Markowitsch
Sascha Markowitsch
KJKira M. Juetter
Kira M. Juetter
PSPatricia Schupp
Patricia Schupp
KHKristine Hauschulte
Kristine Hauschulte
OVOlesya Vakhrusheva
Olesya Vakhrusheva
EJEva Juengel
Eva Juengel
The prognosis for advanced prostate carcinoma (PCa) remains poor due to development of therapy resistance, and new treatment options are needed. Shikonin (SHI) from Traditional Chinese Medicine has induced antitumor effects in diverse tumor entities, but data related to PCa are scarce. Therefore, the parental (=sensitive) and docetaxel (DX)-resistant PCa cell lines, PC3, DU145, LNCaP, and 22Rv1 were exposed to SHI [0.1–1.5 μM], and tumor cell growth, proliferation, cell cycling, cell death (apoptosis, necrosis, and necroptosis), and metabolic activity were evaluated. Correspondingly, the expression of regulating proteins was assessed. Exposure to SHI time- and dose-dependently inhibited tumor cell growth and proliferation in parental and DX-resistant PCa cells, accompanied by cell cycle arrest in the G2/M or S phase and modulation of cell cycle regulating proteins. SHI induced apoptosis and more dominantly necroptosis in both parental and DX-resistant PCa cells. This was shown by enhanced pRIP1 and pRIP3 expression and returned growth if applying the necroptosis inhibitor necrostatin-1. No SHI-induced alteration in metabolic activity of the PCa cells was detected. The significant antitumor effects induced by SHI to parental and DX-resistant PCa cells make the addition of SHI to standard therapy a promising treatment strategy for patients with advanced PCa.

28 March 2020 in World Journal of Urology
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Journal Article
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RDRobert Dotzauer
Robert Dotzauer
ATA. La Torre
A. La Torre
ATAnita Thomas
Anita Thomas
MBM. P. Brandt
M. P. Brandt
KBK. Böhm
K. Böhm
Igor TsaurIgor Tsaur
Igor Tsaur
Purpose: Open simple prostatectomy (OSP) is a standard surgical technique for patients with benign prostatic hyperplasia with prostate size larger than 80 ml. As a minimally invasive approach, robot-assisted simple prostatectomy (RASP) emerged as a feasible surgical alternative. Currently, there are no definite recommendations for the standard use of RASP. Therefore, we aimed at investigating various clinical outcomes comparing RASP with OSP. Methods: In this retrospective single-center study, we evaluated clinical data from 103 RASP and 31 OSP patients. Both cohorts were compared regarding different clinical characteristics with and without propensity score matching. To detect independent predictive factors for clinical outcomes, multivariate logistic regression analysis was performed. Results: Robot-assisted simple prostatectomy patients demonstrated a lower estimated blood loss and need for postoperative blood transfusions as well as less postoperative complications. OSP had a shorter operative time (125 min vs. 182 min) longer hospital stay (11 days vs. 9 days) and longer time to catheter removal (8 days vs. 6 days). In the multivariate analysis, RASP was identified as an independent predictor for longer operative time, lower estimated blood loss, shorter length of hospital stay, shorter time to catheter removal, less postoperative complications and blood transfusions. Conclusion: Robot-assisted simple prostatectomy is a safe alternative to OSP with less perioperative and postoperative morbidity. Whether OSP (shorter operative time) or RASP (shorter length of hospital stay) has a more favorable economic impact depends on the particular conditions of different health care systems. Further prospective comparative research is warranted to define the value of RASP in the current surgical management of benign prostatic hyperplasia.

1 May 2019 in Cancer Treatment Reviews
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Journal Article
Closed access
Igor TsaurIgor Tsaur
Igor Tsaur
IHIsabel Heidegger
Isabel Heidegger
AKAlexander Kretschmer
Alexander Kretschmer
HBHendrik Borgmann
Hendrik Borgmann
GGGiorgio Gandaglia
Giorgio Gandaglia
CSCristian Surcel
Cristian Surcel

2 April 2019 in International Journal of Urology
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Igor TsaurIgor Tsaur
Igor Tsaur
CTChristian Thomas
Christian Thomas
Lymphocele formation is the most common adverse event of pelvic lymphadenectomy during radical prostatectomy for prostate cancer. Previous studies failed to favor one surgical technique over the other in terms of minimizing its rate. Data on risk factors for its development are still conflicting and warranting further research. In this mini‐review, we aimed to scrutinize available evidence on these aspects and outline current achievements in lymphocele prevention approaches.

26 September 2022 in Cancers
Verified
Journal Article
Open access
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Hui XieHui Xie
Hui Xie
JRJochen Rutz
Jochen Rutz
SMSebastian Maxeiner
Sebastian Maxeiner
TGTimothy Grein
Timothy Grein
ATAnita Thomas
Anita Thomas
RBRoman A. Blaheta
Roman A. Blaheta
Combined cisplatin–gemcitabine (GC) application is standard for treating muscle-invasive bladder cancer. However, since rapid resistance to treatment often develops, many patients turn to supplements in the form of plant-based compounds. Sulforaphane (SFN), derived from cruciferous vegetables, is one such compound, and the present study was designed to investigate its influence on growth and proliferation in a panel of drug-sensitive bladder cancer cell lines, as well as their gemcitabine- and cisplatin-resistant counterparts. Chemo-sensitive and -resistant RT4, RT112, T24, and TCCSUP cell lines were exposed to SFN in different concentrations, and tumor growth, proliferation, and clone formation were evaluated, in addition to apoptosis and cell cycle progression. Means of action were investigated by assaying cell-cycle-regulating proteins and the mechanistic target of rapamycin (mTOR)/AKT signaling cascade. SFN significantly inhibited growth, proliferation, and clone formation in all four tumor cell lines. Cells were arrested in the G2/M and/or S phase, and alteration of the CDK–cyclin axis was closely associated with cell growth inhibition. The AKT/mTOR signaling pathway was deactivated in three of the cell lines. Acetylation of histone H3 was up-regulated. SFN, therefore, does exert tumor-suppressive properties in cisplatin- and gemcitabine-resistant bladder cancer cells and could be beneficial in optimizing bladder cancer therapy.