R Siener

Summary

Affiliation: University of Bonn
Country: Germany

Publications

  1. pmc Determinants of brushite stone formation: a case-control study
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    PLoS ONE 8:e78996. 2013
  2. ncbi request reprint Dietary hyperoxaluria is not reduced by treatment with lactic acid bacteria
    Roswitha Siener
    Department of Urology, University Stone Centre, University of Bonn, Sigmund Freud Strase 25, 53105 Bonn, Germany
    J Transl Med 11:306. 2013
  3. doi request reprint The role of Oxalobacter formigenes colonization in calcium oxalate stone disease
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    Kidney Int 83:1144-9. 2013
  4. doi request reprint Determinants of urolithiasis in patients with intestinal fat malabsorption
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    Urology 81:17-24. 2013
  5. pmc Effect of a conventional energy-restricted modified diet with or without meal replacement on weight loss and cardiometabolic risk profile in overweight women
    Christine E Metzner
    Bonn Education Association for Dietetics r, A, Fürst Pückler Str, 44, D 50935 Cologne, Germany
    Nutr Metab (Lond) 8:64. 2011
  6. pmc Effect of a fat spread enriched with medium-chain triacylglycerols and a special fatty acid-micronutrient combination on cardiometabolic risk factors in overweight patients with diabetes
    Roswitha Siener
    Bonn Education Association for Dietetics r, A, Cologne, Germany
    Nutr Metab (Lond) 8:21. 2011
  7. ncbi request reprint Impact of dietary habits on stone incidence
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Str 25, 53105, Bonn, Germany
    Urol Res 34:131-3. 2006
  8. ncbi request reprint Oxalate content of cereals and cereal products
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Strasse 25, D 53105 Bonn, Germany
    J Agric Food Chem 54:3008-11. 2006
  9. ncbi request reprint [Modern general metaphylaxis of stone disease. New risks, new evidence, new recommendations]
    R Siener
    Medizinische Ernährungswissenschaft, Klinik und Poliklinik fur Urologie, Universitat Bonn, Bonn
    Urologe A 45:1392, 1394-8. 2006
  10. doi request reprint Change in the fatty acid pattern of erythrocyte membrane phospholipids after oral supplementation of specific fatty acids in patients with gastrointestinal diseases
    R Siener
    Department of Urology, Medical Nutrition Science, University of Bonn, Bonn, Germany
    Eur J Clin Nutr 64:410-8. 2010

Detail Information

Publications30

  1. pmc Determinants of brushite stone formation: a case-control study
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    PLoS ONE 8:e78996. 2013
    ..The occurrence of brushite stones has increased during recent years. However, the pathogenic factors driving the development of brushite stones remain unclear...
  2. ncbi request reprint Dietary hyperoxaluria is not reduced by treatment with lactic acid bacteria
    Roswitha Siener
    Department of Urology, University Stone Centre, University of Bonn, Sigmund Freud Strase 25, 53105 Bonn, Germany
    J Transl Med 11:306. 2013
    ..Oxalate-degrading bacteria might have beneficial effects on urinary oxalate excretion resulting from decreased intestinal oxalate concentration and absorption...
  3. doi request reprint The role of Oxalobacter formigenes colonization in calcium oxalate stone disease
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    Kidney Int 83:1144-9. 2013
    ..Thus, dietary factors have an important role in urinary oxalate excretion. The data indicate that O. formigenes colonization may reduce the risk of stone recurrence...
  4. doi request reprint Determinants of urolithiasis in patients with intestinal fat malabsorption
    Roswitha Siener
    University Stone Centre, Department of Urology, University of Bonn, Bonn, Germany
    Urology 81:17-24. 2013
    ....
  5. pmc Effect of a conventional energy-restricted modified diet with or without meal replacement on weight loss and cardiometabolic risk profile in overweight women
    Christine E Metzner
    Bonn Education Association for Dietetics r, A, Fürst Pückler Str, 44, D 50935 Cologne, Germany
    Nutr Metab (Lond) 8:64. 2011
    ..abstract:..
  6. pmc Effect of a fat spread enriched with medium-chain triacylglycerols and a special fatty acid-micronutrient combination on cardiometabolic risk factors in overweight patients with diabetes
    Roswitha Siener
    Bonn Education Association for Dietetics r, A, Cologne, Germany
    Nutr Metab (Lond) 8:21. 2011
    ..abstract:..
  7. ncbi request reprint Impact of dietary habits on stone incidence
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Str 25, 53105, Bonn, Germany
    Urol Res 34:131-3. 2006
    ....
  8. ncbi request reprint Oxalate content of cereals and cereal products
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Strasse 25, D 53105 Bonn, Germany
    J Agric Food Chem 54:3008-11. 2006
    ..Recommendations for prevention of recurrence of calcium oxalate stone disease have to take into account the oxalate content of these foodstuffs...
  9. ncbi request reprint [Modern general metaphylaxis of stone disease. New risks, new evidence, new recommendations]
    R Siener
    Medizinische Ernährungswissenschaft, Klinik und Poliklinik fur Urologie, Universitat Bonn, Bonn
    Urologe A 45:1392, 1394-8. 2006
    ..One of the most effective dietary measures is a sufficient circadian fluid intake of suitable beverages. The reduction of overweight is suggested to additionally contribute to a decrease in the risk of recurrent stone formation...
  10. doi request reprint Change in the fatty acid pattern of erythrocyte membrane phospholipids after oral supplementation of specific fatty acids in patients with gastrointestinal diseases
    R Siener
    Department of Urology, Medical Nutrition Science, University of Bonn, Bonn, Germany
    Eur J Clin Nutr 64:410-8. 2010
    ..The aim of this study was to improve the fatty acid profile of erythrocyte membrane phospholipids after oral supplementation of specific fatty acids in patients with maldigestion and/or malabsorption...
  11. doi request reprint Bioavailability of magnesium from different pharmaceutical formulations
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Str 25, 53105, Bonn, Germany
    Urol Res 39:123-7. 2011
    ..This may be attributed to the fact that the tablets have to be dissolved in water before ingestion so that magnesium becomes ionized, which is an important precondition for absorption...
  12. doi request reprint Effect of n-3 fatty acid supplementation on urinary risk factors for calcium oxalate stone formation
    Roswitha Siener
    Department of Urology, University of Bonn, Bonn, Germany
    J Urol 185:719-24. 2011
    ..We evaluated the physiological effects of supplementation with eicosapentaenoic acid and docosahexaenoic acid on urinary risk factors for calcium oxalate stone formation under standardized conditions...
  13. doi request reprint [Recurrence prevention of urolithiasis with respect to economic aspects]
    R Siener
    Universitäres Steinzentrum, Klinik und Poliklinik für Urologie und Kinderurologie, Universitatsklinikum Bonn, Sigmund Freud Strase 25, 53105, Bonn, Deutschland
    Urologe A 50:1276, 1278-82. 2011
    ..In addition to general metaphylaxis (reduction of overweight, physical activity, appropriate fluid intake, balanced diet) further specific measures may be necessary depending on the risk group and stone type...
  14. ncbi request reprint Recent advances in nutritional research on urolithiasis
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Str 25, 53105 Bonn, Germany
    World J Urol 23:304-8. 2005
    ..Further randomized controlled studies should explore the long-term effects of dietary interventions in stone formers...
  15. ncbi request reprint The efficacy of dietary intervention on urinary risk factors for stone formation in recurrent calcium oxalate stone patients
    Roswitha Siener
    Department of Urology, University of Bonn, Bonn, Germany
    J Urol 173:1601-5. 2005
    ..The study was designed to evaluate the effect of dietary intervention on urinary risk factors for recurrence in calcium oxalate stone formers...
  16. ncbi request reprint Dietary risk factors for hyperoxaluria in calcium oxalate stone formers
    Roswitha Siener
    Department of Urology, and Institute of Medical Biometry, Informatics and Epidemiology, University of Bonn, Bonn, Germany
    Kidney Int 63:1037-43. 2003
    ..The aim of the present study was to clarify the role of dietary oxalate in urinary oxalate excretion and to assess dietary risk factors for hyperoxaluria in calcium oxalate stone patients...
  17. ncbi request reprint Urinary oxalate excretion in female calcium oxalate stone formers with and without a history of recurrent urinary tract infections
    R Siener
    Experimentelle Urologie, Klinik und Poliklinik für Urologie der Universität Bonn, Germany
    Urol Res 29:245-8. 2001
    ....
  18. ncbi request reprint Prospective study on the efficacy of a selective treatment and risk factors for relapse in recurrent calcium oxalate stone patients
    Roswitha Siener
    Department of Urology, University of Bonn, Sigmund Freud Str 25, D 53105 Bonn, Germany
    Eur Urol 44:467-74. 2003
    ..The present study was performed to examine the efficacy of a selective treatment according to the guidelines for the prevention of recurrence in calcium oxalate stone patients and to assess risk factors for stone recurrence...
  19. ncbi request reprint The effect of a vegetarian and different omnivorous diets on urinary risk factors for uric acid stone formation
    Roswitha Siener
    Experimentelle Urologie Klinik und Poliklinik für Urologie, Universitat Bonn, Sigmund Freud Str 25, 53105, Bonn, Germany
    Eur J Nutr 42:332-7. 2003
    ..About 10-15% of all urinary stones are composed of uric acid. A high urinary uric acid excretion, a low urine volume and an acidic urinary pH value are suggested to be the most important risk factors for uric acid stone formation...
  20. ncbi request reprint Calcium-binding capacities of different brans under simulated gastrointestinal pH conditions. In vitro study with (45)Ca
    R Siener
    Division of Experimental Urology, Department of Urology, University of Bonn, D 53105 Bonn, Germany
    J Agric Food Chem 49:4397-401. 2001
    ..The results suggest that dietary fiber makes no important contribution to calcium binding, except for soy and oat brans. Oxalate plays only a minor role in calcium binding by brans...
  21. ncbi request reprint Fluid intake and epidemiology of urolithiasis
    R Siener
    Division of Experimental Urology, Department of Urology, University of Bonn, Germany
    Eur J Clin Nutr 57:S47-51. 2003
    ..The type of fluids should be carefully selected to achieve the appropriate change of urine composition depending on stone composition. A sufficient intake of fluid is one of the most important preventive measures for stone recurrence...
  22. ncbi request reprint The role of overweight and obesity in calcium oxalate stone formation
    Roswitha Siener
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Obes Res 12:106-13. 2004
    ..The aim of the study was to assess the influence of overweight and obesity on the risk of calcium oxalate stone formation...
  23. ncbi request reprint Influence of a mineral water rich in calcium, magnesium and bicarbonate on urine composition and the risk of calcium oxalate crystallization
    R Siener
    Division of Experimental Urology, Department of Urology, University of Bonn, Bonn, Germany
    Eur J Clin Nutr 58:270-6. 2004
    ..To evaluate the effect of a mineral water rich in magnesium (337 mg/l), calcium (232 mg/l) and bicarbonate (3388 mg/l) on urine composition and the risk of calcium oxalate crystallization...
  24. ncbi request reprint The effect of different diets on urine composition and the risk of calcium oxalate crystallisation in healthy subjects
    Roswitha Siener
    Division of Experimental Urology, Department of Urology, University of Bonn, Sigmund Freud Street, 25, D 53105, Bonn, Germany
    Eur Urol 42:289-96. 2002
    ..The aim of the study was to determine the impact of defined diet modifications on urine composition and the risk of calcium oxalate crystallisation...
  25. ncbi request reprint Adjuvant chemotherapy in stage I and stage II testicular cancer
    P Albers
    Department of Urology, Bonn University, 53105 Bonn, Germany
    World J Urol 19:76-81. 2001
    ..Thus, 50-84% of patients receive adjuvant treatment unnecessarily. Prognostic factors have been developed in each tumor entity to tailor treatment to patients with high risk of recurrence...
  26. ncbi request reprint Gemcitabine monotherapy as second-line treatment in cisplatin-refractory transitional cell carcinoma - prognostic factors for response and improvement of quality of life
    P Albers
    Klinik und Poliklinik fur Urologie, Universitatsklinikum Bonn, Germany
    Onkologie 25:47-52. 2002
    ..ii) To assess prognostic parameters for response to treatment and for improvement of QoL parameters...
  27. ncbi request reprint Risk factors for relapse in stage I non-seminomatous germ-cell tumors: preliminary results of the German Multicenter Trial. German Testicular Cancer Study Group
    P Albers
    Department of Urology, Bonn University, Germany
    Int J Cancer 83:828-30. 1999
    ..The preliminary results of the current German Multicenter Trial suggest an inferior value of prediction for low-risk patients if risk factor analysis and/or CT staging is performed in non-specialized centers...
  28. ncbi request reprint Randomised phase II trial of gemcitabine and paclitaxel second-line chemotherapy in patients with transitional cell carcinoma (AUO Trial AB 20/99)
    G Fechner
    Department of Urology, Bonn University, Bonn, Germany
    Int J Clin Pract 60:27-31. 2006
    ..The 3-weekly schedule with a nonsplit Pac dose showed a significantly higher complete response rate in our small study population and, thus, might be superior to the 2-weekly schedule...
  29. ncbi request reprint Risk factors for relapse in clinical stage I nonseminomatous testicular germ cell tumors: results of the German Testicular Cancer Study Group Trial
    Peter Albers
    Department of Urology, Bonn University, D 53105 Bonn, Germany
    J Clin Oncol 21:1505-12. 2003
    ..To prospectively assess potential risk factors for relapse in clinical stage I nonseminomatous germ cell tumors of the testis (CS I NSGCT)...
  30. doi request reprint Randomized phase III trial comparing retroperitoneal lymph node dissection with one course of bleomycin and etoposide plus cisplatin chemotherapy in the adjuvant treatment of clinical stage I Nonseminomatous testicular germ cell tumors: AUO trial AH 01/94
    Peter Albers
    Department of Urology, Klinikum Kassel GmbH, Kassel, Germany
    J Clin Oncol 26:2966-72. 2008
    ..Aim of this trial was to prove the advantage of one cycle of bleomycin, etoposide, and cisplatin (BEP) chemotherapy compared with RPLND in terms of recurrence...