Frieder Keller

ORCID: 0000-0001-9280-3334
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About
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Research Areas
  • Renal Transplantation Outcomes and Treatments
  • Pharmacological Effects and Toxicity Studies
  • Antibiotics Pharmacokinetics and Efficacy
  • Renal Diseases and Glomerulopathies
  • Dialysis and Renal Disease Management
  • Electrolyte and hormonal disorders
  • Pharmaceutical studies and practices
  • Acute Kidney Injury Research
  • Pharmacogenetics and Drug Metabolism
  • Vasculitis and related conditions
  • Psychiatric care and mental health services
  • Potassium and Related Disorders
  • Chronic Kidney Disease and Diabetes
  • Metabolism and Genetic Disorders
  • Analytical Methods in Pharmaceuticals
  • Renal function and acid-base balance
  • Pregnancy and Medication Impact
  • Parathyroid Disorders and Treatments
  • Epilepsy research and treatment
  • Bipolar Disorder and Treatment
  • Diabetes Treatment and Management
  • Mental Health Treatment and Access
  • Neurological Complications and Syndromes
  • Organ Donation and Transplantation
  • Statistical Methods in Clinical Trials

University of Massachusetts Chan Medical School
2024

University Hospital Ulm
2010-2023

Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde
2023

Universität Ulm
2006-2022

Helmholtz-Institute Ulm
2021

Universitätsklinik für Kinder und Jugendpsychiatrie
2004-2017

Birmingham VA Medical Center
2015

Creative Research Enterprises (United States)
2015

Semmelweis University
2013

Klinik und Poliklinik für Psychosomatische Medizin und Psychotherapie
2012

Objective: Extended daily dialysis (EDD) combines the advantage of both intermittent hemodialysis and continuous renal replacement therapy: excellent detoxification accompanied by cardiovascular tolerability. The aim this study was to evaluate pharmacokinetics meropenem vancomycin in critically ill patients with failure undergoing EDD. Design: Prospective clinical study. Setting: Surgical intensive care unit a tertiary center. Patients: We studied anuric acute being treated EDD receiving (n...

10.1097/01.ccm.0000190243.88133.3f article EN Critical Care Medicine 2005-12-22

BackgroundKidney recipients maintaining a prolonged allograft survival in the absence of immunosuppressive drugs and without evidence rejection are supposed to be exceptional. The ERA-EDTA-DESCARTES working group together with Nantes University launched European-wide survey identify new patients, describe them estimate their frequency for first time.

10.1093/ndt/gfv437 article EN Nephrology Dialysis Transplantation 2016-01-12

The prognosis of acute renal failure in patients with preexisting liver decompensation is poor, and hemodialysis considered futile, especially for hepatorenal syndrome (HRS). Since we observed a more favorable outcome some patients, retrospectively evaluated 107 decompensated disease (serum creatinine > 200 mumol/L) treated at the medical department university hospital 10-year period (1980-1990). HRS strict sense (urine-Na < 20 mmol/L while on furosemide) was diagnosed 26 (24%). Renal...

10.3109/08860229509026250 article EN Renal Failure 1995-01-01

Nephropathia epidemica, caused by Puumala virus (PUUV) infection, is a form of hemorrhagic fever with renal syndrome variable severity. Early prognostic markers for the severity failure have not been established. We evaluated clinical and laboratory parameters 15 consecutive patients acute PUUV which endemic in Alb-Danube region, South Germany. Severe (serum creatinine >620 micromol/L) was observed seven patients; four required hemodialysis treatment. Low platelet count (<60 x 109/L), but...

10.3201/eid1008.031069 article EN cc-by Emerging infectious diseases 2004-08-01

Cyclosporin A trough blood levels were unusually low during rifampin treatment in a kidney transplant patient. Simultaneously, acute graft rejection occurred. Pharmacokinetic investigation revealed rapid turnover of cyclosporin leading to levels. Cessation therapy reversed these changes. Rifampin substantially reduces the bioavailability and should not be used recipients on A.

10.1159/000166968 article EN American Journal of Nephrology 1985-01-01

Extended daily dialysis (EDD) is increasingly popular in the treatment of acute renal failure (ARF). EDD could remove drugs to a much different degree compared with intermittent standard hemodialysis or continuous replacement therapies; however, there are only scarce data on how influences pharmacokinetics frequently used drugs. The aim this study was determine two quinolone antibiotics patients who had anuric ARF and were being treated EDD. Adult intensive care unit at tertiary university...

10.2215/cjn.01840506 article EN Clinical Journal of the American Society of Nephrology 2006-09-28

In patients with chronic renal failure, secondary hyperparathyroidism (sHPT) is a common problem requiring surgical parathyroidectomy (PTX) if medical treatment active vitamin D and calcimimetics fails. To minimize the risk for recurrence, we perform total PTX (tPTX) without autotransplantation. From October 1997 to January 2004, 46 (31 men 15 women) underwent tPTX autotransplantation (median age 51 years; range 19-80 median dialysis time before 5 0-25 years). Indications were...

10.1159/000191200 article EN Nephron Clinical Practice 2009-01-13

ANCA-associated vasculitis is the most frequent cause of crescentic GN. To define new molecular and/or cellular biomarkers this disease in kidney, we performed microarray analyses renal biopsy samples from patients with Expression profiles were correlated clinical data a prospective study ANCA disease. CC chemokine ligand 18 (CCL18), acting through receptor 8 (CCR8) on mononuclear cells, was identified as upregulated chemotactic cytokine newly diagnosed Macrophages and myeloid dendritic...

10.1681/asn.2014040407 article EN Journal of the American Society of Nephrology 2015-03-12

Besides rejection-induced transplant glomerulopathy, de novo membranous glomerulonephritis (MGN) is the most frequent cause of nephrotic syndrome after renal transplantation. We evaluated 1029 transplantations (271 without and 758 with cyclosporine treatment), performed on 848 patients between 1970 1992, which resulted in 872 functioning grafts. De MGN was seen 30 biopsy specimens from 21 (about 2%), whom 10 had received immunosuppressive treatment 11 cyclosporine. Taking into account longer...

10.1097/00007890-199409270-00002 article EN Transplantation 1994-09-01

Little is known about hepatotoxicity associated with valproic acid (VPA), a widely used substance in neuropsychiatry. All reported cases to the German Federal Institute for Drugs and Medical Devices between 1993 2009 of VPA-induced serious hepatic side effects were evaluated. A total 132 VPA-associated liver failure identified. Approximately one third (34.8%) occurred under VPA monotherapy, while majority was seen plus co-medication, most frequently antiepileptics benzodiazepines (16.7%)....

10.1055/s-0032-1323671 article EN Pharmacopsychiatry 2012-08-22

Abstract Background After kidney transplantation, pregnancy and graft function may have a reciprocal interaction. We evaluated the influence of on course vice versa. Methods performed retrospective observational study 92 pregnancies beyond first trimester in 67 women after renal transplantation from 1972 to 2019. Pre-pregnancy eGFR was correlated with outcome parameters; by Kaplan Meier analysis. The 28 who became pregnant an &lt; 50 mL/min/1.73m 2 compared control group 79 non-pregnant...

10.1186/s12882-022-02665-2 article EN cc-by BMC Nephrology 2022-01-12
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