Visit of Jean-Philippe Courtois and Renate Radon

Jean-Philippe Courtois (Executive Vice President and President, Microsoft Global Sales, Marketing and Operations), Renate Radon (Senior Director Public Sector, Microsoft Deutschland) and other high-ranking representatives of Microsoft visited us in order to see the HoloLens in use for preoperative planning and during surgery. We had a very fruitful discussion on Mixed Reality and Virtual Reality in medicine and are looking forward to a strong collaboration!

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SPARK Berlin supports Fikatas Knot

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The Berlin Institute of Health (BIH) and Stiftung Charité teamed up with Stanford University School of Medicine to initiate SPARK Berlin.

We are very pleased to announce that Dr. Panagiotis Fikatas' project “Device for ready-prepared surgical knots” was selected for both, funding and mentorship. 

SPARK was created to overcome the hurdles associated with translating academic discoveries into therapeutics and diagnostics that address unmet medical needs.
The SPARK mission is to help academics overcome the obstacles involved in moving their early discoveries from bench to bedside, to educate faculty, postdoctoral fellows and graduate students on the translational research process and path to clinical application, so that development of promising discoveries becomes second nature to our institution, and to develop more cost-effective and innovative approaches to drug development .

Congratulations!

...

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Although we do hate Facebook, feel kind of robbed and dislike the music –
We have to admit: 7,201,027 clicks (as of January 25th, 2016) are impressive…

Evaluation of a new knotting concept – Fikatas knot

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Decellularization of rat liver – New time lapse video

Retreat 2013

Einladung zur öffentlichen Abschlußpräsentation

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Sehr geehrte Damen und Herren,
Dear ladies and gentlemen,

Sie sind herzlich eingeladen, unserer öffentlichen Abschlusspräsentation unseres EU/EFRE-Projekts am 20.03.2013 um 15:00 Uhr beizuwohnen. Zusammen mit unseren Partnern der Firma microparticles GmbH werden wir den aktuellen Stand zur „Entwicklung von Partikel zur Detektion und ultralokoregionären Stimulation transplantierter Leberzellen“ darlegen.
You are cordially invited to attend our public presentation of our EU/EFRE project. Together with our partners of microparticles GmbH we will present our latest results concerning the „Development of particles for detection and ultralocoregional stimulation of transplanted liver cells“.

Wann/When?
20.03.2013 um/at 15:00

Wo/Where?
Experimentelle Chirurgie und Regenerative Medizin
Klinik für Allgemein-, Viszeral- und Transplantationschirurgie
Charité, Campus Virchow-Klinikum
Forschungshaus/BMFZ
Pilzraum, 1.OG

Wir wären dankbar, wenn Sie Ihr Kommen via email (anja.selke@charite.de)bestätigen könnten.
RSVP via email (anja.selke@charite.de).

CARS microscopy of MPIO

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Following a successful project sponsored by the BMBF G. Pless, I.M. Sauer and U. Rauen report on the "Improvement of the cold storage of isolated human hepatocytes" (Cell Transplant. 2011 Jun 7. [Epub ahead of print]).
Increasing amounts of human hepatocytes are needed for clinical applications and different fields of research, such as cell transplantation, bioartificial liver support and pharmacological testing. This demand calls for adequate storage options for isolated human liver cells. As cryopreservation results in severe cryoinjury, short term storage is currently performed at 2-8º C in preservation solutions developed for the storage of solid organs. However, besides slowing down cell metabolism, cold also induces cell injury, which is, in many cell types, iron-dependent and not counteracted by current storage solutions. In this study, we aimed to characterize storage injury to human hepatocytes and develop a customized solution for cold storage of these cells. Human hepatocytes were isolated from material obtained from partial liver resections, seeded in monolayer cultures and, after a pre-culture period, stored in the cold in classical and new solutions followed by rewarming in cell culture medium.Human hepatocytes displayed cold-induced injury, resulting in > 80% cell death (LDH release) after one week of cold storage in University of Wisconsin solution or cell culture medium and 3 h of rewarming. Cold-induced injury could be significantly reduced by the addition of the iron chelators deferoxamine and LK 614. Experiments with modified solutions based on the new organ preservation solution Custodiol-N showed that ion-rich variants were better than ion-poor variants, chloride-rich solutions better than chloride-poor solutions, potassium as main cation superior to sodium and pH 7.0 superior to pH 7.4. LDH release after two weeks of cold storage in the thus optimized solution was below 20%, greatly improving cold storage of human hepatocytes. The results were confirmed by the assessment of hepatocellular mitochondrial membrane potential and functional parameters (resazurin reduction, glucacon-stimulated glucose liberation) and thus suggest the use of a customized hepatocyte storage solution for the cold storage of these cells.

Improved cold storage of human hepatocytes

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As a first result of our latest projects concerning the role of miRNA in liver regeneration the American Journal of Physiology - Regulatory, Integrative and Comparative Physiology has accepted our paper "Temporal expression profiles indicate a primary function for microRNA during the peak of DNA replication after rat partial hepatectomy": The liver has the unique capacity to regenerate after surgical resection. However, the regulation of liver regeneration is not completely understood. Recent reports indicate an essential role for small non-coding microRNAs (miRNAs) in the regulation of hepatic development, carcinogenesis, and early regeneration. We hypothesized that miRNAs are critically involved in all phases of liver regeneration after partial hepatectomy. We performed miRNA microarray analyses after 70% partial hepatectomy in rats under isoflurane anesthesia at different time points (0 hours - 5 days) and after sham laparotomy. Putative targets of differentially expressed miRNAs were determined using a bioinformatic approach. 2D-PAGE proteomic analyses and protein identification were performed on specimens at 0 and 24 hours after resection. The temporal dynamics of liver regeneration were characterized by BrdU, PCNA, IL-6, and HGF. We demonstrate that miRNA expression patterns changed during liver regeneration and that these changes were most evident during the peak of DNA replication at 24 hours after resection. Expression of thirteen miRNAs was significantly reduced 12-48 hours after resection (> 25% change), ouf of which downreguation was confirmed in isolated hepatocytes for 6 miRNAs at 24 hours, whereas three miRNAs were significantly upregulated. Proteomic analysis revealed 65 upregulated proteins; among them 23 represent putative targets of the differentially expressed miRNAs. We provide a temporal miRNA expression and proteomic dataset of the regenerating rat liver, which indicates a primary function for miRNA during the peak of DNA replication. These data will assist further functional studies on the role of miRNAs during liver regeneration. Authors are N. Raschzok, W. Werner, H. Sallmon, N. Billecke, C. Dame, P. Neuhaus and I.M. Sauer.

BMBF prize for medical technology awarded

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This book is the proceedings of the Falk Symposium No. 145 on ‘Artificial Liver Support’, held on 27--28 January 2005 in Ulm, Germany, and provides an overview of the possibilities and limitations of the existing procedures and devices available for artificial liver support. The book is written for clinicians, researchers, graduate students, and academics.
For more than 25 years clinicians and scientists have been trying to improve the treatment of acute hepatic failure. Several devices were developed and hemodialysis procedures were refined. The treatment of fulminant hepatic failure and end-stage liver cirrhosis by liver transplantation became a standard procedure. However, for the successful management of critical situations before and after liver surgery, artificial liver support is still needed. The results achieved with albumin dialysis (MARS System), the Prometheus System, and dialysis and hemofiltration or plasma exchange as well as modular extracorporeal liver support (MELS) and the Amsterdam bioartificial liver (AMC BAL) are discussed in detail regarding their effects in different clinical situations.
In the second half of the book, the remaining problems and expectations for the future of clinical hepatocyte transplantation and stem cell therapy are elucidated.
Leading experts in the fields of artificial devices, bioartificial devices, hepatocyte transplantation and stem cells present the latest data on these topics. Their experience and their data are summarized in this volume, thus providing an exceptional overview of the problems and future perspectives in the field of artificial liver support.
Artificial Liver Support Series: Falk Symposium, Vol. 145 Henne-Bruns, D.; Buttenschön, K.; Fuchs, M.; Lohse, A. (Eds.) Springer-Verlag 2005 (ISBN: 1-4020-3239-0)

BMBF awarded new grant

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The SlideReactor - A Simple Hollow Fiber Based Bioreactor Suitable for Light Microscopy (Igor M. Sauer, Ruth Schwartlander, Jochen Schmid, Ekaterina Efimova, Florian W.R. Vondran, Daniel Kehr, Gesine Pless, Antonino Spinelli, Börries Brandenburg, Eberhardt Hildt, and Peter Neuhaus) was published in the latest issue of Artificial Organs, Volume 29 Issue 3 Page 264 ff.  - March 2005: Most bioartificial liver support systems are based on hollow fiber capillaries within modified dialysis cartridges or more sophisticated bioreactor constructions. Due to their design microscopic follow-up of reorganization and growth of tissue between the hollow fibers is not possible. The SlideReactor is a simple hollow fiber based bioreactor construction suitable for light microscopy and time-lapse video observation. The SlideReactor offers a cell compartment separated from a medium inflow and outflow compartment. Cell compartment access ports enable easy filling of the cell compartment with cell suspension, as well as fixation of the tissue. For more complex procedures or full access to all the cells, the bioreactor can be opened easily by cutting the silicone seal with a scalpel. Due to its simple design and the utilization of standard materials, it could serve as a suitable, cost-efficient tool to evaluate the behavior of cells cultured between hollow fiber capillaries. The paper describes the production process: similar to open source projects in software engineering, we would like to propose the concept as an open platform to anyone interested in hollow fiber based cell culture.

SPAD at Children’s Hospital, Seattle

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Wenn ein Organ ausfällt, braucht der Körper Hilfe. Regenerative Medizin könnte eine Selbstheilung ermöglichen, doch einstweilen braucht es Ersatzteile aus Metall, Plastik oder Silizium. Die aktuelle Ausgabe des Journals M.I.T. Technology Review (Deutsche Ausgabe, November 2004) bringt diverse Artikel zum Thema Regenerative Medizin, unter anderem auch bezüglich des Modular Extracorporeal Liver Support (MELS) Konzept.

Evaluation of bioreactor systems

Via Stüber's Online Library more than 270 historic books in the fields of anatomy, botany, biology and genetics can be accessed. Amongst others Rudolf Virchow's "Die Freiheit der Wissenschaft im modernen Staat" (1877) is available!

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