Forschungsbericht 2011



Technologien für Zell- und Gewebekulturen

Institut: V-1
Projektleitung: Ralf Pörtner
Mitarbeiter/innen: Christiane Goepfert
Stefanie Meyer
Oscar Ben-Jail Platas Barradas
Mareike Rausch
Silke Rieck
Grit Blume
Katharina Wiegandt
Laufzeit: 01.04.90 0 — 01.10.2024
Finanzierung:Technische Universität Hamburg-Harburg (TUHH)
Kooperationen:Bioengineering AG, Wald, Schweiz
Bioglobe GmbH, Hamburg
Dr. Uwe Marx, TissUse GmbH, Berlin
DTL Biotechnology Ltd, Ireland
Fraunhofer Einrichtung Marine Biotechnologie, Lübeck
Infors AG, Schweiz
Ingenieurbüro Dr.-Ing. Schoop GmbH
medorex eK, Bovenden
Prof. Dr.-Ing. Björn Frahm, FH Lemgo
Prof. Dr.-Ing. Dieter Eibl, ZHAW Wädenswil, Schweiz
Prof. Dr.-Ing. Hoc Kiem Trieu, Technische Universität Hamburg-Harburg, Institut für Mikrosystemtechnik
Prof. Dr.-Ing. Peter Czermak, TH Mittelhessen, Gießen
Prof. Dr.-Ing. Thomas Becker, TU München
Prof. Dr.-Ing. Volker C. Hass, HS Furtwangen
Prof. Dr. Gerardo Catapano, Uni. of Calabria, Italy
Prof. Dr. Michael Amling, UKE Hamburg
Prof. Dr. Roland Lauster, TU Berlin
Prof. Dr. Udo Schumacher, UKE Hamburg
ZellWerk GmbH, Eichstädt
Internationalisierung:Schweiz

Zellkulturprozesse zur Wirkstoffproduktion

Steuerung von fed-batch-Prozessen
Design, Betrieb und Scale-up von Festbettreaktoren mit immobilisierten Zellen

 

Tissue Engineering

Herstellung implantierbarer Knorpel-Träger-Konstrukte als Gelenkflächenersatz
3D-Gewebekulturen für Toxizitätstests

Stichworte

  • Bioreaktor
  • Hochzelldichte Kultivierung
  • humane Zellen
  • Kinetische Modellierung
  • Knorpel
  • Knorpelersatz
  • NS0-Zelllinien
  • Stammzellen
  • Tissue Engineering
  • Zellkultur

Publikationen

  • Pörtner, Ralf and Platas-Barradas, Oscar and Gradkowski, Janosh and Gautam, Richa and Kuhnen, Florian and Hass, Volker C: "BioProzessTrainer'' as training tool for design of experiments BMC Proceedings, 5(Suppl 8): S. P62, 2011.
  • Goepfert, Christiane and Scheurer, Wibke and Rohn, Susanne and Rathjen, Britta and Meyer, Stefanie and Dittmann, Anja and Wiegandt, Katharina and Janß en, Rolf and Pörtner, Ralf: 3D-Bioreactor culture of human hepatoma cell line HepG2 as a promising tool for in vitro substance testing BMC Proceedings, 5(Suppl 8): S. P61, 2011.
  • Pörtner, R and Koop, M: A model for oxygen supply in fixed bed reactors with immobilized hybridoma cells Bioprocess Engineering, 17(5): S. 269, 1997.
  • Goepfert, Christiane and Blume, Grit and Faschian, Rebecca and Meyer, Stefanie and Schirmer, Cedric and Müller-Wichards, Wiebke and Müller, Jörg and Fischer, Janine and Feyerabend, Frank and Pörtner, Ralf: A modular flow-chamber bioreactor concept as a tool for continuous 2D- and 3D-cell culture BMC Proceedings, 7(Suppl 6): S. P87, 2013.
  • Frahm, Björn and Lane, Paul and Atzert, Hendrik and Munack, Axel and Hoffmann, Martin and Hass, Volker C and Pörtner, Ralf: Adaptive, model-based control by the Open-Loop-Feedback-Optimal (OLFO) controller for the effective fed-batch cultivation of hybridoma cells Biotechnology progress, 18(5): S. 1095--1103, 2002.
  • : Animal cell biotechnology: Methods and protocols, Jg. 1104 von Methods in molecular biology. Humana Press, New York u.a, , 3, 2014
  • : Animal cell biotechnology: Methods and protocols, Jg. 24 von Methods in biotechnology. Humana Press, Totowa N.J, , 2, 2007
  • Nagel-Heyer, Stephanie and Goepfert, Christiane and Feyerabend, Frank and Petersen, Jan Philipp and Adamietz, Peter and Meenen, Norbert M and Pörtner, Ralf: Bioreactor cultivation of three-dimensional cartilage-carrier-constructs Bioprocess and biosystems engineering, 27(4): S. 273--280, 2005.
  • Pörtner, Ralf and Nagel-Heyer, Stephanie and Goepfert, Christiane and Adamietz, Peter and Meenen, Norbert M: Bioreactor design for tissue engineering Journal of bioscience and bioengineering, 100(3): S. 235--245, 2005.
  • Kasper, Cornelia and van Griensven, Martijn and Pörtner, Ralf: Bioreactor systems for tissue engineering II: Strategies for the expansion and directed differentiation of stem cells, Jg. 123 von Advances in biochemical engineering/biotechnology. Springer, Heidelberg and New York, , 2010
  • Kasper, Cornelia and van Griensven, Martijn and Pörtner, Ralf: Bioreactor systems for tissue engineering, Jg. 112 von Advances in biochemical engineering/biotechnology. Springer, Berlin, , 2008
  • Pörtner, R and Hsu, H.-H and Goepfert, C: Bioreaktoren für Knochen-Tissue-Engineering Osteologie, 22(3): S. 188--195, 2013.
  • Janssen, Rolf and Nagel-Heyer, Stephanie and Goepfert, Christiane and Prtner, Ralf and Toykan, Derya and Krummhauer, Oliver and Morlock, Michael and Adamietz, Peter and Meenen, Norbert M and Kriven, Waltraud M and Kim, Dong-Kyu and Tampieri, Anna and Celotti, Giancarlo: Calcium Phosphate Ceramics as Substrate for Cartilage Cultivation Ceramic Engineering and Science Proceedings , 25(4): S. 523-528, 2004.
  • Nagel-Heyer, S and Janssen, Rolf and Goepfert, C and Adamietz, P and Meenen, N M and Pörtner, R: Cartilage Cultivation on a Calcium Phosphate Ceramic in a Bioreactor System Key Engineering Materials, 264-268: S. 2119--2122, 2004.
  • Goepfert, C and Slobodianski, A and Schilling, A F and Adamietz, P and Pörtner, R: Cartilage engineering from mesenchymal stem cells Advances in biochemical engineering/biotechnology, 123: S. 163-200, 2010.
  • Eibl, Regine and Eibl, Dieter and Pörtner, Ralf and Catapano, Gerardo and Czermak, Peter: Cell and Tissue Reaction Engineering. Springer-Verlag Berlin Heidelberg, Berlin and Heidelberg, , 2009NaNWith a Contribution by Martin Fussenegger and Wilfried Weber.
  • Meyer, Stefanie and Heinsohn, Guido and Wolber, Rainer and Pörtner, Ralf and Nierle, Jens: Confocal Raman investigation of diffusion processes in monolithic type transdermal drug delivery systems Drug delivery, 2014.
  • Platas Barradas, O and Jandt, U and Da Minh Phan, L. and Villanueva, M and Rath, A and Reichl, U and Schrader, E and Scholz, S and Noll, T and Sandig, V and Portner, R and Zeng, A P: Criteria for bioreactor comparison and operation standardisation during process development for mammalian cell culture BMC Proc, 5 Suppl 8: S. P47, 2011.
  • Weber, Christian and Pohl, Sebastian and Pörtner, Ralf and Wallrapp, Christine and Kassem, Moustapha and Geigle, Peter and Czermak, Peter: Cultivation and Differentiation of Encapsulated hMSC-TERT in a Disposable Small-Scale Syringe-Like Fixed Bed Reactor The open biomedical engineering journal, 1: S. 64-70, 2007.
  • Nagel-Heyer, Stephanie and Goepfert, Christiane and Adamietz, Peter and Meenen, Norbert M and Pörtner, Ralf: Cultivation of three-dimensional cartilage-carrier-constructs under reduced oxygen tension Journal of biotechnology, 121(4): S. 486-497, 2006.
  • Schaletzky, M and Platas Barradas, O and Sievert, H and Balabanov, S and Zeng, A P and Portner, R: Cultivation strategies of a BA/F3 cell line for fundamental cell research BMC Proc, 5 Suppl 8: S. P48, 2011.
  • Frahm, Björn and Blank, Heinz-Christian and Cornand, Peter and Oelssner, Wolfram and Guth, Ulrich and Lane, Paul and Munack, Axel and Johannsen, Klaus and Pörtner, Ralf: Determination of dissolved CO(2) concentration and CO(2) production rate of mammalian cell suspension culture based on off-gas measurement Journal of biotechnology, 99(2): S. 133-148, 2002.
  • Pörtner, R and Märkl, H: Dialysis cultures Applied microbiology and biotechnology, 50(4): S. 403-414, 1998.
  • Sercinoglu, O and Platas Barradas, O and Sandig, V and Zeng, A P and Portner, R: DoE of fed-batch processes - model-based design and experimental evaluation BMC Proc, 5 Suppl 8: S. P46, 2011.
  • Lüdemann, I and Pörtner, R and Märkl, H: Effect of NH3 on the cell growth of a hybridoma cell line Cytotechnology, 14(1): S. 11-20, 1994.
  • Fassnacht, D and Rössing, S and Fran\vek, F and Al-Rubeai, M and Pörtner, R: Effect of bcl-2 expression on hybridoma cell growth in serum-supplemented, protein-free and diluted media Cytotechnology, 26(3): S. 219-225, 1998.
  • Blume, Grit and Müller-Wichards, Wiebke and Goepfert, Christiane and Pörtner, Ralf and Müller, Jörg: Electrical Stimulation of NIH-3T3 Cells with Platinum-PEDOT-Electrodes Integrated in a Bioreactor The open biomedical engineering journal, 7: S. 125-132, 2013.
  • Pörtner, R and Bohmann, A and Lüdemann, I and Märkl, H: Estimation of specific glucose uptake rates in cultures of hybridoma cells Journal of biotechnology, 34(3): S. 237-246, 1994.
  • Goepfert, Christiane and Lutz, Vivien and Lünse, Svenja and Kittel, Sabrina and Wiegandt, Katharina and Kammal, Michael and Püschel, Klaus and Pörtner, Ralf: Evaluation of cartilage specific matrix synthesis of human articular chondrocytes after extended propagation on microcarriers by image analysis The International journal of artificial organs, 33(4): S. 204--218, 2010.
  • Platas Barradas, Oscar and Jandt, Uwe and Minh Phan, Linh Da and Villanueva, Mario E and Schaletzky, Martin and Rath, Alexander and Freund, Susann and Reichl, Udo and Skerhutt, Eva and Scholz, Sebastian and Noll, Thomas and Sandig, Volker and Pörtner, Ralf and Zeng, An-Ping: Evaluation of criteria for bioreactor comparison and operation standardization for mammalian cell culture Engineering in Life Sciences, 12(5): S. 518-528, 2012.
  • Platas, Oscar B and Sandig, Volker and Pörtner, Ralf and Zeng, An-Ping: Evaluation of process parameters in shake flasks for mammalian cell culture BMC Proceedings, 7(Suppl 6): S. P17, 2013.
  • Pörtner, Ralf and Schwabe, Jan-Oliver and Frahm, Björn: Evaluation of selected control strategies for fed-batch cultures of a hybridoma cell line Biotechnology and applied biochemistry, 40(1): S. 47-55, 2004.
  • Weber, Christian and Pohl, Sebastian and Pörtner, Ralf and Wallrapp, Christine and Kassem, Moustapha and Geigle, Peter and Czermak, Peter: Expansion and Harvesting of hMSC-TERT The open biomedical engineering journal, 1: S. 38-46, 2007.
  • Weber, Christian and Freimark, Denise and Pörtner, Ralf and Pino-Grace, Pablo and Pohl, Sebastian and Wallrapp, Christine and Geigle, Peter and Czermak, Peter: Expansion of human mesenchymal stem cells in a fixed-bed bioreactor system based on non-porous glass carrier - Part B: Modeling and scale-up of the system The International journal of artificial organs, 33(11): S. 782--795, 2010.
  • Weber, Christian and Freimark, Denise and Pörtner, Ralf and Pino-Grace, Pablo and Pohl, Sebastian and Wallrapp, Christine and Geigle, Peter and Czermak, Peter: Expansion of human mesenchymal stem cells in a fixed-bed bioreactor system based on non-porous glass carrier--part A: inoculation, cultivation, and cell harvest procedures The International journal of artificial organs, 33(8): S. 512-525, 2010.
  • Nehring, D and R. Gonzales and P. Czermak and R. Pörtner:: Experimental and modeling study of a membrane filtration process using ceramic membranes to increase retroviral pseudotype vector titer Journal of Membrane Science, 2004(237): S. 25--38, 2004.
  • Nehring, Dirk and Gonzalez, Roberto and Pörtner, Ralf and Czermak, Peter: Experimental and modelling study of different process modes for retroviral production in a fixed bed reactor Journal of biotechnology, 122(2): S. 239-253, 2006.
  • Fassnacht, D and Pörtner, R: Experimental and theoretical considerations on oxygen supply for animal cell growth in fixed-bed reactors Journal of biotechnology, 72(3): S. 169-184, 1999.
  • Frahm, B and Hass, V C and Lane, P and Munack, A and Märkl, H and Pörtner, R: Fed-Batch-Kultivierung tierischer Zellen - Eine Herausforderung zur adaptiven, modellbasierten Steuerung Chemie Ingenieur Technik, 75(4): S. 457--460, 2003.
  • Pörtner, R and Lüdemann, I and Reher, K and Neumaier, M and Märkl, H: Fixed-bed dialysis culture of a transfectoma cell line producing chimeric Fab-fragments with "nutrient-split"-feeding strategy Biotechnology Techniques, 12(7): S. 501--505, 1998.
  • Becker, Thomas and Hitzmann, Bernd and Muffler, K and Pörtner, Ralf and Reardon, Kenneth F and Stahl, Frank and Ulber, Roland: Future aspects of bioprocess monitoring Advances in biochemical engineering/biotechnology, 105: S. 249-293, 2007.
  • Ong, C P and Pörtner, R and Märkl, H and Yamazaki, Y and Yasuda, K and Matsumura, M: High density cultivation of hybridoma in charged porous carriers Journal of biotechnology, 34(3): S. 259-268, 1994.
  • Pörtner, R and Schilling, A and Lüdemann, I and Märkl, H: High density fed-batch cultures for hybridoma cells performed with the aid of a kinetic model Bioprocess Engineering, 15(3): S. 117--124, 1996.
  • Hißnauer, Tim-Nicolas and Baranowsky, Anke and Pestka, Jan M and Streichert, Thomas and Wiegandt, K and Goepfert, C and Beil, Frank Timo and Albers, Joachim and Schulze, Jochen and Ueblacker, Peter and Petersen, Jan-Philipp and Schinke, Thorsten and Meenen, N M and Pörtner, R and Amling, Michael: Identification of molecular markers for articular cartilage Osteoarthritis and cartilage, 18(12): S. 1630--1638, 2010.
  • Frahm, B and Lane, P and Märkl, H and Pörtner, R: Improvement of a mammalian cell culture process by adaptive, model-based dialysis fed-batch cultivation and suppression of apoptosis Bioprocess and biosystems engineering, 26(1): S. 1--10, 2003.
  • Lüdemann, I and Pörtner, R and Schaefer, C and Schick, K and Sr\'amkova, K and Reher, K and Neumaier, M and Fran\vek, F and Märkl, H: Improvement of the culture stability of non-anchorage-dependent animal cells grown in serum-free media through immobilization Cytotechnology, 19(2): S. 111-124, 1995.
  • Schwabe, J O and Pörtner, R and Märkl, H: Improving an on-line feeding strategy for fed-batch cultures of hybridoma cells by dialysis and `Nutrient-Split'-feeding Bioprocess Engineering, 20(6): S. 475-484, 1999.
  • Wiegandt, Katharina and Goepfert, Christiane and Pörtner, Ralf: Improving in vitro generated cartilage-carrier-constructs by optimizing growth factor combination The open biomedical engineering journal, 1: S. 85-90, 2007.
  • Hussein, M A and Esterl, S and Pörtner, R and Wiegandt, K and Becker, T: Impulse and mass transport in a cartilage bioreactor using the lattice Boltzmann method International Journal of Computational Fluid Dynamics, 22(5): S. 341--350, 2008.
  • Meyer, Stefanie and Peters, Nils and Mann, Tobias and Wolber, Rainer and Pörtner, Ralf and Nierle, Jens: In vitro efficacy and release study with anti-inflammatory drugs incorporated in adhesive transdermal drug delivery systems Journal of pharmaceutical sciences, 103(4): S. 1142-1148, 2014.
  • Wiegandt, Katharina and Goepfert, Christiane and Richter, Teresa and Fritsch, Daniel and Janßen, Rolf and Pörtner, Ralf: In vitro generation of cartilage-carrier-constructs on hydroxylapatite ceramics with different surface structures The open biomedical engineering journal, 2: S. 64-70, 2008.
  • Fassnacht, D and Rössing, S and Singh, R P and Al-Rubeai, M and Pörtner, R: Influence of bcl-2 on antibody productivity in high cell density perfusion cultures of hybridoma Cytotechnology, 30(1-3): S. 95-106, 1999.
  • Fassnacht, D and Ghaussy, N and Rössing, S and Pörtner, R: Influence of non-essential amino acids on apoptotic and necrotic death of mouse hybridoma cells in batch cultures Biotechnology Letters, 19(1): S. 35--38, 1997.
  • Hass, V C and Kuhnen, F and Schoop, K.-M and Pörtner, R: Integration von computerbasiertem Lernen und Training in die bioverfahrenstechnische Ausbildung Chemie Ingenieur Technik, 77(8): S. 1250-1251, 2005.
  • Wiegandt, K and Goepfert, C and Pörtner, R and Janssen, R: Interaction of cartilage and ceramic matrix Advances in biochemical engineering/biotechnology, 126: S. 297--315, 2012.
  • Pörtner, R and Hass, V C: Interaktive virtuelle Lernumgebung für die Biotechnologie (eLearnBioTec) Chemie Ingenieur Technik, 77(8): S. 1256, 2005.
  • Weiss, K D Salzig M D Mühlebach K Cichutek R Pörtner and Czermak, P: Key parameters of measles virus production for oncolytic virotherapy American Journal of Biochemistry and Biotechnology, 2012(8 (2)): S. 81-98, 2012.
  • Pörtner, R and Rössing, S and Koop, M and Lüdemann, I: Kinetic studies on hybridoma cells immobilized in fixed bed reactors Biotechnology and Bioengineering, 55(3): S. 535-541, 1997.
  • Meenen, N M and Ueblacker, P and Pörtner, R and Göpfert, C and Nagel-Heyer, S and Petersen, J P and Adamietz, P: Knorpel aus dem Labor - eine Sackgasse? Arthroskopie, 18(3): S. 245-252, 2005.
  • Petersen, J P and Ueblacker, P and Goepfert, C and Adamietz, P and Baumbach, K and Stork, A and Rueger, J M and Poertner, R and Amling, M and Meenen, N M: Long term results after implantation of tissue engineered cartilage for the treatment of osteochondral lesions in a minipig model Journal of materials science. Materials in medicine, 19(5): S. 2029-2038, 2008.
  • Fassnacht, D and Rossing, S and Stange, J and Portner, R: Long-term cultivation of immortalised mouse hepatocytes in a high cell density fixed bed reactor Biotechnology Techniques, 12(1): S. 25-30, 1998.
  • Kern, Simon and Platas, Oscar B and Schaletzky, Martin and Sandig, Volker and Frahm, Björn and Pörtner, Ralf: Model-based design of the first steps of a seed train for cell culture processes BMC Proceedings, 7(Suppl 6): S. P11, 2013.
  • Pörtner, R and Schäfer, T: Modelling hybridoma cell growth and metabolism-a comparison of selected models and data Journal of biotechnology, 49(1-3): S. 119-135, 1996.
  • Hussein, M A and Esterl, S and Pörtner, R and Wiegandt, K and Becker, T: On the lattice Boltzmann method simulation of a two-phase flow bioreactor for artificially grown cartilage cells Journal of biomechanics, 41(16): S. 3455-3461, 2008.
  • Rausch, Mareike Katharina: Optimierung der Proteinexpression in Insektenzellen und Scale-up in den Wave-Bioreaktor. Promotion/Dissertation, TUHH, Institut für Bioprozess- und Biosystemtechnik, , 2011.
  • Frahm, B and Pörtner, R and Lane, P and Munack, A: Optimierung und Steuerung von Zellkultur-Fed-Batch-Prozessen mittels einer Kollokationsmethode Chemie Ingenieur Technik, 77(4): S. 429-435, 2005.
  • Bohmann, A and Pörtner, R and Märkl, H: Performance of a membrane-dialysis bioreactor with a radial-flow fixed bed for the cultivation of a hybridoma cell line Applied microbiology and biotechnology, 43(5): S. 772-780, 1995.
  • Nehring, Dirk and Adamietz, Peter and Meenen, Norbert M and Pörtner, Ralf: Perfusion cultures and modelling of oxygen uptake with three-dimensional chondrocyte pellets Biotechnology Techniques, 13(10): S. 701-706, 1999.
  • Pörtner, Ralf and M. Matsumura and T. Hatae and K. Murakami and H. Kataoka: Perfusion-microcarrier cultivation of rCHO cells in serum free medium for production of human renin Bioprocess Engineering, 1991(7): S. 63-69, 1991.
  • Hass, Volker C and Pörtner, Ralf: Praxis der Bioprozesstechnik: Mit virtuellem Praktikum. Spektrum Akad. Verl, Heidelberg, , 2009
  • Hass, Volker C and Pörtner, Ralf: Praxis der Bioprozesstechnik: Mit virtuellem Praktikum. Spektrum Akad. Verl, Heidelberg, , 2, 2011
  • Druzinec, Damir and Weiss, Katja and Elseberg, Christiane and Salzig, Denise and Kraume, Matthias and Pörtner, Ralf and Czermak, Peter: Process analytical technology (PAT) in insect and mammalian cell culture processes: dielectric spectroscopy and focused beam reflectance measurement (FBRM) Methods in molecular biology (Clifton, N.J.), 1104: S. 313--341, 2014.
  • Weber, C and Pohl, S and Poertner, R and Pino-Grace, Pablo and Freimark, D and Wallrapp, C and Geigle, P and Czermak, P: Production process for stem cell based therapeutic implants: expansion of the production cell line and cultivation of encapsulated cells Advances in biochemical engineering/biotechnology, 123: S. 143--162, 2010.
  • Pörtner, Ralf: Reaktionstechnik der Kultur tierischer Zellen. Shaker, Aachen, , Als Ms. gedr., 1998
  • Heyland, Jan and Wiegandt, Katharina and Goepfert, Christiane and Nagel-Heyer, Stefanie and Ilinich, Eduard and Schumacher, Udo and Pörtner, Ralf: Redifferentiation of chondrocytes and cartilage formation under intermittent hydrostatic pressure Biotechnology letters, 28(20): S. 1641-1648, 2006.
  • Fussenegger, M and Fassnacht, D and Schwartz, R and Zanghi, J A and Graf, M and Bailey, J E and Pörtner, R: Regulated overexpression of the survival factor bcl-2 in CHO cells increases viable cell density in batch culture and decreases DNA release in extended fixed-bed cultivation Cytotechnology, 32(1): S. 45-61, 2000.
  • Fassnacht, Dieter and I. Reimann, R Pörtner und H Märkl: Scale-up von Festbettreaktoren zur Kultivierung tierischer Zellen Chemie Ingenieur Technik, 2001(73): S. 1075-1079, 2001.
  • Hernandez Rodriguez, Tanja and Pörtner, Ralf and Frahm, Björn: Seed train optimization for suspension cell culture BMC Proceedings, 7(Suppl 6): S. P9, 2013.
  • Cantürk, Cumhur and Baade, Ulrike and Salazar, Ramona and Storm, Niels and Pörtner, Ralf and Höppner, Wolfgang: Sequence analysis of CYP21A1P in a German population to aid in the molecular biological diagnosis of congenital adrenal hyperplasia Clinical chemistry, 57(3): S. 511-517, 2011.
  • Pörtner, R and Goepfert, C and Wiegandt, K and Janssen, R and Ilinich, E and Paetzold, H and Eisenbarth, E and Morlock, M: Technical strategies to improve tissue engineering of cartilage-carrier-constructs Advances in biochemical engineering/biotechnology, 112: S. 145-181, 2009.
  • Pörtner, R and Meenen, N M: Technische Aspekte in regenerativer Medizin und Tissue Engineering von hyalinem Gelenkknorpel Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft f\ü\r Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft f\ü\r Mikrochirurgie der Peripheren Nerven und Gef\äße : Organ der Vereinigung der Deutschen Plastischen Chirurgen, 42(6): S. 329-336, 2010.
  • Bohmann, A and Pörtner, R and Schmieding, J and Kasche, V and Märkl, H: The membrane dialysis bioreactor with integrated radial-flow fixed bed - a new approach for continuous cultivation of animal cells Cytotechnology, 9(1-3): S. 51-57, 1992.
  • Kasper, Cornelia and Witte, Frank and Pörtner, Ralf: Tissue Engineering III: Cell - Surface Interactions for Tissue Culture, Jg. 126 von Advances in Biochemical Engineering Biotechnology. Springer Berlin Heidelberg, Berlin Heidelberg, , 2012
  • Freimark, D and Pino-Grace, P and Pohl, S and Weber, C and Wallrapp, C and Geigle, P and Pörtner, R and Czermak, P: Use of Encapsulated Stem Cells to Overcome the Bottleneck of Cell Availability for Cell Therapy Approaches Transfusion medicine and hemotherapy : offizielles Organ der Deutschen Gesellschaft fur Transfusionsmedizin und Immunhamatologie, 37(2): S. 66-73, 2010.