SlideObserver in Journal of Biotechnology

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Nils Billeckes paper „An operational concept for long-term cinemicrography of cells in mono- and co-culture under highly controlled conditions - the SlideObserver“ was accepted for publication in Journal of Biotechnology! Co-authors are Nathanael Raschzok, Susanne Rohn Mehmet H. Morgul, Ruth Schwartlander, Martina Mogl, Sonja Wollersheim, Katharina R. Schmitt and Igor M. Sauer. The paper is now available online.

Cell morphology, proliferation and motility, as well as mono- and heterotypic cell-to-cell interactions, are of increasing interest for in vitro experiments. However, tightly controlling culture conditions while simultaneously monitoring the same set of cells is complicated. Moreover, video-microscopy of distinct cells or areas of cells over a prolonged period of time represents a technical challenge. The SlideObserver was designed for cinemicrography of cells in co-and monoculture. The core elements of the system are the SlideReactors, miniaturised hollow fibre-based bioreactors operated in closed perfusion loops. Within the SlideReactors, cells can be cultured under standard and experimental conditions as well as in direct- and indirect co-culture. The independent perfusion loops enable controlled variation of parameters such as medium, pH, and oxygenation. A combined automated microscope stage and camera set-up allows for micrograph acquisition of multiple user-defined regions of interest within the bioreactor units. For proof of concept, primary cells (HUVEC, human hepatocytes) and cell lines (HuH7, THP-1) were cultured under stable and varying culture conditions, as well as in mono- and co-culture. The operational system enabled non-stop imaging and automated control of process parameters as well as elective manipulation of either reactor. As opposed to static culture systems or comparable devices for cinemicrographic analysis, the SildeObserver allows simultaneous morphological monitoring of an entire culture of cells in control and experimental bioreactors.

Dr. rer. medic. Ruth Schwartlaender

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Ruth Schwartlaender successfully defended her thesis "summa cum laude". After three years of extremely fruitful research and development she is (co-)author of 8 papers in peer reviewed journals (with more to come...) and gave numerous lectures at international meetings in the field of artificial organs and regenerative medicine. Her work was supported by research grants from the Berliner Graduiertenfoerderung (NaFOG) and the German Federal Ministry of Education and Research (BMBF - 0312111). Her latest results were published in the January issue of Tissue Engineering.

SlideReactor: Proof of concept

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Tissue Engineering published the article "Continuously Microscopically Observed and Process-Controlled Cell Culture Within the SlideReactor: Proof of a New Concept for Cell Characterization"  by R. Schwartlander, J. Schmid J, B. Brandenburg, E. Katenz, F.W. Vondran, G. Pless, X. Cheng X, A. Pascher A, P. Neuhaus P, and I.M. Sauer in the January 2007 issue.
Moreover, the editors have chosen one of the figures showing fluorsecent staining of primary human hepatocytes cultured within the SlideReactor as cover-art!
Certain cell types, especially primary human cells, favor a well-defined culture environment offering continuous supply of nutrients and oxygen and waste product removal. Several bioreactors based on special matrices or hollow fibers have been developed that provide such conditions. However, characterization of matrix re-organization or growth of tissue within these systems is possible only after culture termination. Evaluation of the influence of certain medium additives or culture conditions (e.g., temperature, oxygenation) on cell viability, expansion, and differentiation within these systems remains a challenging task. The SlideReactor, a miniaturized hollow fiber-based bioreactor, was developed to enable the observation of cells during culture. An operation concept offering predefined conditions for various cell types has been designed. For proof of concept, primary human cells (hepatocytes, fibroblasts, keratinocytes) and cell lines (HepG2, HuH7, C3A, WiDr, SkHep1) were cultured and observed. A series of experiments (n = 40) showed the feasibility of the set-up; determination of process parameters and continuous observation is possible. The SlideReactor may serve as a simple and cost-efficient tool for cell characterization and optimization of cell-culture conditions.

The SlideReactor

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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.

Ruth Schwartlander receives grant

Ruth Schwartlander successfully applied for a grant by the Berliner Graduiertenförderung (NaFöG).

SlideReactor starlet at exhibition

A multicompartment SlideReactor is shown at the exhibition “WeltWissen – World Knowledge”.
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This year, Berlin celebrates 200 years of the Humboldt University, 300 years of the Charité, 300 years since the first statute and first publication by the Academy of the Sciences and, one year later, 100 years of the Max Planck and Kaiser Wilhelm Society and the 350th birthday of the Berlin State Library. The exhibition “WeltWissen – World Knowledge” is the high point of the Berlin Year of Science. The Humboldt University, the Charité, the Berlin-Brandenburg Academy of the Sciences and Humanities and the Max Planck Society have organised the exhibition as a unique joint project. The Technical University, the Berlin State Museums and the Deutsches Museum, Munich are involved as partners. From 24 September 2010 to 9 January 2011, Martin-Gropius-Bau will be host   ing its “WeltWissen“ (World Knowledge) exhibition which takes a look at 300 years of the science in Berlin from an all-embracing perspective that crosses institutions, disciplines and epochs. The exhibition is the high point of the Berlin Year of Science. On an exhibition space of more than 3,200 square metres, visitors are presented with over 1,500 original exhibits, installations and media stations. The Humboldt University, the Charité, the Berlin-Brandenburg Academy of the Sciences and Humanities and the Max Planck Society have organised the exhibition as a unique joint project.
The exhibition correlates sciences in Berlin to the world: only the dynamic interplay of local imprinting and worldwide networking has allowed Berlin since 300 years to generate knowledge and share it with the world. Concrete and highly vivid stories and biographies of objects, researchers and institutions offer exciting insights into the scientific environment. “WeltWissen – World Knowledge” shows how scientists in Berlin work, how they network internationally, how they break down the boundaries of their departments and how they transformed Berlin into a scientific metropolis. 

WeltWissen. 300 Years of Science in Berlin 24 September 2010 – 9 January 2011  Martin-Gropius-Bau, Niederkirchnerstrasse 7, 10963 Berlin
Opening times: Wed - Mo: 10.00 am – 8.00 pm, closed on Tuesdays
Admission: 6 €, reduced 4€ . Free admission for children and adolescents up to an including 16 years of age, two escorts each per kindergarten group or school class as well as recipients of unemployment benefit level II 
Public transport: Underground line 2 (Potsdamer Platz), city train lines 1, 2, 25 (Potsdamer Platz or Anhalter Bahnhof), Buses: M29 (Anhalter Bahnhof) / M41 (Abgeordnetenhaus)
Please find more information at: www.weltwissen-berlin.de, www.gropiusbau.de

Copyright of upper,  large picture:
Roman März