Publications by authors named "Bjoern Nashan"

To investigate the clinical efficacy of avatrombopag, an oral thrombopoietin receptor agonist, versus subcutaneous recombinant human thrombopoietin (rh-TPO) in the treatment of severe thrombocytopenia (TCP) associated with chronic liver disease (CLD). Clinical data of 250 patients with severe TCP associated with CLD were collected in a single hospital from January 2019 to January 2022. The main parameters measured were the therapeutic response rate, changes in platelets (PLTs), and adverse events.

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Background: Although the Clavien-Dindo classification is well established in many fields of surgery, a conclusive severity grading system for liver surgery-specific complications has not yet been standardized. Post-hepatectomy liver Failure, Ascites, Bile leakage, Infection, and Bleeding were found to be the five most important components in an international survey. A score system with FABIB as the acronym was proposed by the authors to increase the feasibility of routine use.

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The utility of autologous induced pluripotent stem cell (iPSC) therapies for tissue regeneration depends on reliable production of immunologically silent functional iPSC derivatives. However, rejection of autologous iPSC-derived cells has been reported, although the mechanism underlying rejection is largely unknown. We hypothesized that de novo mutations in mitochondrial DNA (mtDNA), which has far less reliable repair mechanisms than chromosomal DNA, might produce neoantigens capable of eliciting immune recognition and rejection.

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Selection and prioritization of patients with HCC for LT are based on pretransplant imaging diagnostic, taking the risk of incorrect diagnosis. According to the German waitlist guidelines, imaging has to be reported to the allocation organization (Eurotransplant) and pathology reports have to be submitted thereafter. In order to assess current procedures we performed a retrospective multicenter analysis in all German transplant centers with focus on accuracy of imaging diagnostic and tumor classification.

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Background: To be an optimal immunosuppressive regimen after simultaneous pancreas kidney transplantation (SPK), low dose calcineurin inhibitor and early withdrawal of corticosteroids are desired.

Methods: Immunosuppressive regimen as such has been conducted consecutively in SPK recipients since 2009 in authors' institute. In addition to tacrolimus in low trough level and early corticosteroid withdraw, dual induction with basiliximab and low-dose thymoglobulin in combination with everolimus are the important components of the protocol.

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Introduction: Full-split liver transplantation (LTX) offers the possibility to expand the donor pool by utilization of one liver for two adults. The aim of our study was to analyze the long-term outcome in a large series and its applicability in the recent transplant era.

Methods: We performed a retrospective analysis of all full-split LTX from deceased donors (1999-2015).

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Unlabelled: : This multicentric study of 17 high-volume centers presents 12 benchmark values for liver transplantation. Those values, mostly targeting markers of morbidity, were gathered from 2024 "low risk" cases, and may serve as reference to assess outcome of single or any groups of patients.

Objective: To propose benchmark outcome values in liver transplantation, serving as reference for assessing individual patients or any other patient groups.

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Background: Peritoneal dialysis (PD) catheter occlusion is a common complication with up to 36% of catheter obstructions described in the literature. We present a comparison of complications and outcome after implantation of PD catheters in a transplant surgical and a pediatric surgical department.

Methods: We retrospectively analyzed 154 PD catheters, which were implanted during 2009-2015 by transplant surgeons (TS, University Medical Center Hamburg-Eppendorf, Germany, n=85 catheters) and pediatric surgeons (PS, Charité University Medicine Berlin, Germany, n=69 catheters) in 122 children (median (range) age 3.

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The enzymatic defect in MSUD results in accumulation of neurotoxic metabolites of BCAAs. LTX has shown to be a feasible strategy in patients non-responsive to diet. Because of sufficient enzyme activity in extrahepatic tissues in healthy people, the MSUD liver graft is a suitable domino organ.

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Background: BK polyomavirus (BKV) infection and BKV nephropathy (BKVN) are risk factors for allograft function and survival.

Methods: We retrospectively analyzed BK viremia and BKVN in 348 patients who received a kidney transplantation donated after brain death (n=232) or living donation (n=116) between 2008 and 2013. A total of 266 patients were treated with standard immunosuppression consisting of basiliximab induction, calcineurin inhibitor (CNI), and mycophenolic acid (MPA, n=219) or everolimus (n=47); 82 patients received more intense immunosuppression with lymphocyte depletion, CNI and MPA (n=38) or everolimus (n=44).

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Background: Evidence relating to early everolimus use after liver transplantation remains limited.

Material And Methods: Ninety-one adult patients undergoing liver transplantation at our center during 2007-2012 in whom everolimus therapy was initiated <3 months post-transplant were analyzed retrospectively. Everolimus was started on days 1-5 in 50 patients (group 1) and after day 5 in 41 patients (group 2).

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Aims: Chronic renal allograft loss is still an unsolved problem in kidney transplantation. We evaluated the impact of FTY720, a S1P receptor agonist, known to deplete lymphocytes from the peripheral blood by sequestering them into lymph nodes and Peyer's patches, on blood lymphocytes and graft infiltrating cells in a rat model of chronic real allograft rejection.

Methods: LEW rats served as recipients for LEW.

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Background: Surgical complications are estimated to be as high as 30%-40% during the first 8 weeks after implantation of peritoneal dialysis (PD) catheters.

Methods: 70 PD catheters which were implanted by transplant surgeons in 61 children (median age 3.3years, range 0.

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ABO-incompatible (ABOi) kidney transplantation (KTx) has become an accepted therapeutic option in renal replacement therapy for patients without a blood group-compatible living donor. Using different desensitization strategies, most centers apply B-cell depletion with rituximab and maintenance immunosuppression (IS) with tacrolimus and mycophenolic acid. This high load of total IS leads to an increased rate of surgical complications and virus infections in ABOi patients.

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Background: Early detection of alcohol misuse in orthotopic liver transplantation recipients is essential to offer patients support and prevent organ damage. Here, ethyl glucuronide, a metabolite of ethanol found in hair (hEtG), was evaluated for detection of alcohol consumption.

Methods: In 104 transplant recipients, 31 with underlying alcoholic liver disease (ALD) and 73 with non-ALD, hEtG was determined in addition to the alcohol markers urine EtG, blood ethanol, methanol, and carbohydrate-deficient transferrin.

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In case of graft failure, re-LTX is the only life-saving option but it has been associated with inferior results. This study analyzes the outcome following pediatric re-LTX with a main focus on the timely relation between initial transplant and re-LTX. All pediatric LTX at our institution between 2000 and 2010 divided into patients with primary LTX and patients undergoing re-LTX early (≤30 days) or late (>30 days) after previous LTX were analyzed.

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Individualization of immunosuppressive medications is an important objective in transplantation medicine. Reliable biomarkers to distinguish between patients dependent from intensive immunosuppressive therapy and those where therapy can be minimized among pediatric transplant recipients receiving immunosuppressive medications are still not established. We evaluated the potential of cross-sectional quantification of regulatory T cells, lymphocyte subsets, and cytokine concentrations as biomarkers in 60 pediatric liver transplant recipients with AR, CR, or normal graft function and in 11 non-transplanted patients.

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Due to a lack of available size-matched liver grafts from children, most pediatric recipients are transplanted with technical variant grafts from adult donors. Size requirements for these grafts are not well defined, and consequences of mismatched graft sizes in pediatric liver transplantation are not known. Existing formulas for calculation of a standard liver volume are mostly derived from adults disregarding the age-related percentual liver weight changes in children.

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Background & Aims: Prior to listing patients for Orthotopic liver transplantation (OLT) an abstention period of 6 months is required. Ethyl glucuronide in the hair is a new reliable marker for the assessment of alcohol consumption. Here, the diagnostic value of determining the ethyl glucuronide concentration in the hair of liver transplant candidates was evaluated.

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In ARPKD, mutations in the PKHD1 gene lead to remodeling of the kidneys and liver. These may result in progressive liver fibrosis with portal hypertension requiring combined liver and kidney transplantation (CLKT). There is currently no consensus on the indication for CLKT and data on long-term outcomes are scarce.

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Treatment options of recurrent hepatocellular carcinoma (HCC) after liver transplantation are limited and data on systemic compounds for advanced tumor stages in transplant recipients are sparse. We retrospectively analyzed the toxicity, tolerability, and efficacy of sorafenib in combination with mTOR inhibitors (mTORi), or calcineurin inhibitors (CNI) in transplant recipients with recurrent HCC. In total, 20 of 92 patients transplanted for HCC within a 10-year time period, experienced tumor recurrence.

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Human hepatocyte transplantation has not been routinely established as an alternative to liver transplantation in liver disease due to low cell engraftment rates. Preimplantation in vitro engineering of liver tissue using primary human hepatocytes on three-dimensional scaffolds could be an alternative model. Alginate bioscaffolds were seeded with 1×10(6) hepatocytes freshly isolated from the livers of three children suffering from different metabolic disorders.

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Unlabelled: Optimal selection of liver transplant candidates and early detection of alcohol relapse after orthotopic liver transplantation (OLT) is necessary to improve long-term outcomes. In this study, urinary ethyl glucuronide (uEtG) was prospectively evaluated as a novel screening tool for alcohol detection in the transplant setting. Overall, 141 liver transplant candidates and recipients, visiting the outpatient clinic for a total of 308 times, were included.

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