Bile: miRNA Pattern post OLT

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BIOMARKERS accepted our latest paper on "Bile: miRNA Pattern and Protein Based Biomarkers May Predict Acute Cellular Rejection after Liver Transplantation" for publication. Authors are Rosa Bianca Schmuck, Anja Reutzel-Selke, Nathanael Raschzok, Mehmet Haluk Morgul, Benjamin Struecker, Steffen Lippert, Cynthia de Carvalho Fischer, Moritz Schmelzle, Sabine Boas-Knoop, Marcus Bahra, Andreas Pascher, Johann Pratschke, and Igor M. Sauer.

Bile rather than blood depicts the local inflammation in the liver and may improve prediction and diagnosis of acute cellular rejection (ACR) after liver transplantation (OLT). Secretome and miRNAs were analyzed during the first two weeks and on clinical suspicion of ACR in the bile of 45 OLT recipients. Levels of CD44, CXCL9, miR-122, miR-133a, miR-148a and miR-194 were significantly higher in bile of patients who developed ACR within the first 6 months after OLT and during ACR. Analysis of secretome and miRNA in bile could further our understanding of the local inflammatory process during rejection.

Biomarkers. 2016 Aug 5:1-9. [Epub ahead of print]

The Morning After

Referring to our paper „CD44 and CXCL9 serum protein levels predict the risk of clinically significant allograft rejection after liver transplantation“ Geoffrey W. McCaughan, Patrick Bertolino and David G. Bowen wrote an interesting editorial entitled „Could The Morning After liver transplant be immunologically interesting?“

They conclude, „that our study urges us to study the immune system response in liver allograft recipients during the very early phases after liver transplantation and to explore how events in immune organs and the allograft are reflected within the serum. Whether the patterns observed truly represent early detection of ACR versus tolerance, or a combination of both, requires further study and experimentation, including the identification of the cellular sources of these and other potential markers of immune outcome. It seems that despite significant levels of immunosuppressive drugs, immune activation and engagement occurs very early after human liver transplant, within the first 24 hours, in a manner that may have similarities with experimental animal models. Thus, the morning after effect could be an exciting window to longer-term immune outcomes, rather than just being preoccupied with observing important routine outcomes and detecting early complications.“ See Liver Transplantation, Volume 21, Issue 9, pages 1120–1122, September 2015

CD44 and CXCL9 predicting rejection after LTx

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Based on a fruitful collaboration with the department of Visceral, Transplantation, Thoracic, and Vascular Surgery at the University of Leipzig our paper on CD44 and CXCL9 serum protein levels predict the risk of clinically significant allograft rejection after liver transplantationhas been accepted for publication in Liver Transplantation.
Authors are Nathanael Raschzok, Anja Reutzel-Selke, Rosa Bianca Schmuck, Mehmet Haluk Morgul, Ulrich Gauger, Kukuh Aji Prabowo, Laura-Marie Tannus, Annekatrin Leder, Benjamin Struecker, Sabine Boas-Knoop, Michael Bartels, Sven Jonas, Christian Lojewski, Gero Puhl, Daniel Seehofer, Marcus Bahra, Andreas Pascher, Johann Pratschke, and Igor Maximilian Sauer.

The diagnosis of acute cellular rejection (ACR) after liver transplantation is based on histological analysis of biopsies because non-invasive biomarkers for allograft rejection are not yet established for clinical routines. CD31, CD44, and CXCL9 have previously been described as biomarkers for cross-organ allograft rejection. Here, we assessed the predictive and diagnostic value of these proteins as serum biomarkers for clinically significant ACR in the first six months after liver transplantation in a prospective study. The protein levels were measured in 94 patients immediately prior to transplantation, at postoperative days (POD) 1, 3, 7, and 14, and when biopsies were performed during episodes of biochemical graft dysfunction. Our results suggest that CD44 and CXCL9 may serve as predictive biomarkers to identify liver allograft recipients at risk for clinically significant ACR.

WTC 2014 in San Francisco

WTC2014

Ben Strücker presented the latest results on „Perfusion Decellularization of Pig and Rat Livers Applying Undulating Surrounding Pressure Conditions“. Co-authors were A. Butter, K. Hillebrandt, R. Voitl, D. Polenz, A. Reutzel-Selke, K. Joehrens, D. Geisel, N. Raschzok, P. Neuhaus, J. Pratschke and I.M. Sauer.

Nathanael Raschzok presentation was entitled: „Perioperative Serum Levels of CXCL9 and CD44 Predict the Risk of Acute Cellular Rejection in Liver Graft Recipients“. Co-authors were N. Raschzok, A. Reutzel-Selke, R. Schmuck, M. Morgul, M. Bartels, G. Puhl, D. Seehofer, M. Bahra, A. Pascher, P. Neuhaus, J. Pratschke and I.M. Sauer.