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  • 1
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Cell physiology. ; Biological systems. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (432 pages)
    Edition: 1st ed.
    ISBN: 9781402052521
    Series Statement: Cell Engineering Series ; v.5
    DDC: 571.6
    Language: English
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  • 2
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Cell culture -- Technique. ; Tissue culture -- Technique. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (766 pages)
    Edition: 1st ed.
    ISBN: 9783319103204
    Series Statement: Cell Engineering Series ; v.9
    DDC: 571.6381
    Language: English
    Note: Intro -- Preface -- Contents -- Contributors -- Chapter 1: Cell Line Development -- 1.1 Introduction -- 1.1.1 Product Quantity -- 1.1.2 Product Quality -- 1.2 Two Components of Cell Line Development: The Gene of Interest (GOI) and the Cell -- 1.3 The Classical Approach: Random Integration of GOI -- 1.4 Stable Expression by Episomal Vectors -- 1.5 Targeted Integration and Locus Specific Gene Expression -- 1.5.1 Technologies of Targeted Integration -- 1.5.2 Double Strand Break Induced Homologous Recombination -- 1.5.3 Random Integration Competes with HR -- 1.5.4 Applications of DSB Induced Modifications -- 1.5.5 Cassette Exchange Approaches Based on Site-Specific Recombinases -- 1.5.6 Tagging and Targeting -- 1.5.7 Application of Targeted Integration and RMCE -- 1.5.8 Precautions and Challenges for Targeting into Defined Chromosomal Sites -- References -- Chapter 2: Transient Recombinant Protein Expression in Mammalian Cells -- 2.1 Introduction -- 2.2 Viral Transient Transfection -- 2.3 Non-viral Transient Transfection -- 2.4 Plasmid Vector Design -- 2.4.1 Plasmid Backbone and Size -- 2.4.2 Vector Elements -- 2.4.3 Episomal Replication -- 2.5 Transfection Principles -- 2.5.1 Calcium Phosphate Coprecipitation and Calfection -- 2.5.2 DNA Lipoplex Formation and Lipid-Based Transfection -- 2.5.3 Cationic Polymers and Transient Transfection with DNA Polyplexes -- 2.5.3.1 Polyplex Uptake, Plasmid Release and Translocation into the Nucleus -- 2.5.3.2 PEI Derivatives and Other Cationic Polymers as Alternatives to PEI -- 2.5.4 Transient Transfection by Electroporation -- 2.6 Cell Lines for Non-viral Transient Transfection -- 2.7 Cell Culture Media Conditions -- 2.7.1 Use of Productivity Enhancers -- 2.8 Process Strategies for Improved Recombinant Protein Production -- 2.8.1 Mild Hypothermia -- 2.8.2 High-Density Transfection and `Direct´ Transfection. , 2.8.3 Co-transfection Strategies -- 2.8.4 Large-Scale and Automated High-Throughput Applications -- References -- Chapter 3: Production of Antibodies in Hybridoma and Non-hybridoma Cell Lines -- 3.1 Introduction -- 3.2 Antibody Structure and Function -- 3.2.1 Antibody Genes -- 3.3 Therapeutic Antibodies -- 3.3.1 Polyclonal Antibodies -- 3.3.2 Monoclonal Antibodies -- 3.4 Recombinant Antibodies -- 3.4.1 Chimeric Antibodies -- 3.4.2 Humanised Antibodies -- 3.4.3 Human Antibodies -- 3.4.4 Next Generation of Therapeutic Antibodies: Antibody-Drug Conjugates, Bi-specific Antibodies and Antibody Fragments -- 3.4.4.1 Antibody Drug Conjugates (ADCs) -- 3.4.4.2 Bispecific Antibodies -- 3.4.4.3 Antibody Fragments -- 3.5 Role of Therapeutic Antibodies in Cancer and Rheumatoid Arthritis -- 3.5.1 Therapeutic Antibodies and Cancer -- 3.5.1.1 Rituxan -- 3.5.1.2 Herceptin -- 3.5.1.3 Avastin -- 3.5.2 Therapeutic Antibodies and Rheumatoid Arthritis -- 3.5.2.1 Remicade -- 3.5.2.2 Humira -- 3.5.2.3 Enbrel -- Conclusion -- References -- Chapter 4: Bioreactors for Mammalian Cells -- 4.1 Introduction to Cultivation Systems for Mammalian Cells -- 4.1.1 Requirements and Categorization of Cultivation Systems -- 4.1.2 Immobilization of Mammalian Cells -- 4.1.3 ``Single Use´´-Bioreactors -- 4.1.4 Process Strategies -- 4.1.5 Monitoring and Control -- 4.1.6 Parameters for Characterization of Bioreactors -- 4.2 Small-Scale Culture Systems -- 4.2.1 Static Culture Systems -- 4.2.2 Dynamic Culture Systems -- 4.3 Bioreactors for Suspension Culture -- 4.3.1 Cell Damage in Stirred and Bubble Aerated Bioreactors -- 4.3.2 Design of Suspension Bioreactors -- 4.3.2.1 Stirred Tank Bioreactors -- Vessel Design -- Impeller -- Aeration Systems -- Performance Parameters -- 4.3.2.2 Bubble Columns and Air-Lift Bioreactors -- 4.3.2.3 Wave Mixed Bioreactors. , 4.3.2.4 Devices for Cell and Product Retention -- 4.3.3 Scale-Up Considerations -- 4.4 Bioreactors for Immobilized Cells -- 4.4.1 Fixed Bed and Fluidized Bed Bioreactors -- 4.4.1.1 Fixed Bed Bioreactors -- 4.4.1.2 Fluidized Bed Bioreactors -- 4.4.2 ``Hollow-Fiber´´-Bioreactors -- 4.5 Bioreactor Concepts for Tissue Engineering -- 4.6 Considerations on Bioreactor Selection and Process Design -- References -- Chapter 5: Mass Transfer and Mixing Across the Scales in Animal Cell Culture -- 5.1 Introduction -- 5.2 Oxygen Mass Transfer -- 5.2.1 Basic Oxygen Mass Transfer Concepts and Equations -- 5.2.2 The Volumetric Mass-Transfer Coefficient, kLa -- 5.2.3 The Measurement of kLa -- 5.2.3.1 The Unsteady-State (Dynamic) Method -- 5.2.3.2 The Steady State Technique -- 5.2.4 Correlations for Calculating kLa -- 5.2.4.1 Stirred Bioreactors -- 5.2.4.2 Headspace Aeration and Shaken Bioreactors -- 5.2.4.3 Bubble Columns -- 5.3 Carbon Dioxide Stripping -- 5.3.1 The `Apparent´ Mass Transfer Coefficient Issue -- 5.3.2 CO2 Evolution Rate, CER, and Control of pCO2 -- 5.3.3 pH and Osmolality -- 5.4 Heat Transfer -- 5.5 Homogeneity Issues -- 5.6 Choice of Agitation Conditions and Agitator -- 5.6.1 Mean Specific Energy Dissipation Rate, -- 5.6.2 Hydromechanical Stress Issues Due to Agitation -- 5.7 Hydromechanical Stress from Sparging -- 5.8 Agitator and Sparger Choice -- 5.9 Scale-up and Ultra Scale-Down Issues -- Conclusions -- References -- Chapter 6: Hydrodynamic Damage to Animal Cells -- 6.1 Introduction -- 6.2 Hydrodynamic Forces Acting on Cells -- 6.3 Experimental Studies Attempting to Quantify Cell Damage -- 6.4 Cell Damage from Sparging -- 6.5 Experimental Sublethal Effect of Hydrodynamic Stress -- Conclusion and Future Directions -- References -- Chapter 7: Monitoring of Cell Culture -- 7.1 Introduction -- 7.2 Monitoring Principles -- 7.3 Historical Perspective. , Scope of This Article -- 7.4 Parameters and Technologies: Viable Cell Density, Total Cell Density and Cell Viability -- 7.4.1 Dye-Based Methods for Monitoring Cell Density and Viability -- 7.4.1.1 Trypan Blue Dye Exclusion -- Hemoyctometer -- Automated Trypan Blue Based Cell Counting -- Additional, general aspects of trypan blue based cell counting methods -- 7.4.1.2 Fluorescence Based Cell Density and Viability Determination via Flow Cytometry -- 7.4.2 Non-dye-based Methods for Monitoring Cell Density and Viability -- 7.4.2.1 Impedance (Electrical Resistance) Measurement -- 7.4.2.2 Capacitance Measurement -- 7.4.2.3 Electromagnetic Spectroscopic Measurements (NIR, MIR, Raman) -- Near Infrared Spectroscopy (NIRS) -- Mid Infrared Spectroscopy (MIRS) -- Raman Spectroscopy -- General advantages/disadvantages of electromagnetic spectroscopy methods for cell density and viability determination -- 7.4.2.4 In Situ Microscopy -- 7.5 Parameters and Technologies: Metabolic Parameters and Recombinant Products -- 7.5.1 Automated Analyzers (Substrate, Metabolite and Product Monitoring) -- 7.5.2 Spectroscopic Methods (Substrate, Metabolite and Product Monitoring) -- 7.5.2.1 Near Infrared Spectroscopy (NIRS) -- 7.5.2.2 Mid Infrared Spectroscopy (MIRS) -- 7.5.2.3 Raman Spectroscopy -- 7.5.3 Automated Systems for Product-Quantification -- 7.5.3.1 Surface Plasmon Resonance (Biacore Systems) -- 7.5.3.2 Bio-Layer Interferometry (Octet Systems) -- 7.5.3.3 Microfluidic Gel Electrophoresis (Caliper LapChip Systems) -- 7.6 Parameters and Technologies: Monitoring Cell Stress and Apoptosis -- 7.6.1 Flow Cytometry (FC) -- 7.6.2 Microplate/Multiwell Plate-Reader -- 7.6.3 Mass Spectrometry -- 7.6.4 Dielectrophoresis -- References -- Chapter 8: Serum and Protein Free Media -- 8.1 Introduction -- 8.2 The Advantages and Disadvantages of Serum -- 8.3 Serum-Free Media. , 8.4 Basal Media -- 8.5 Approaches for the Development of Serum-Free Media -- 8.5.1 Top-Down Approach for Serum Replacement -- 8.5.2 Bottom-Up Approach for Serum Replacement -- 8.6 A Statistical Approach to Serum-Free Media Development -- 8.7 Mitogenic Components Needed to Replace Serum -- 8.7.1 Peptide Hydrolysates -- 8.7.2 Insulin and Insulin-Like Growth Factor -- 8.7.3 Epithelial Growth Factor (EGF) -- 8.8 Transferrin: A Carrier Protein -- 8.9 Attachment Factors -- Conclusion -- References -- Chapter 9: Glycosylation in Cell Culture -- 9.1 Introduction -- 9.2 Glycosylation Structures -- 9.3 Cell Type Specific Glycosylation -- 9.4 Culture Parameters Affecting Glycosylation -- 9.5 Glycosylation Engineering and Modification of Glycan Structure -- Conclusion -- References -- Chapter 10: Modelling of Mammalian Cell Cultures -- 10.1 Scope of Bio-pharmaceutical Industry and Challenges -- 10.2 Critical Review of Mathematical Models of Biological System -- 10.3 Classifications -- 10.3.1 Models Based on Classification of Bioprocesses -- 10.3.2 Classification of the Different Forms of Mathematical (Nonlinear) Models -- 10.3.3 Black-Box, Grey-Box and White-Box Models -- 10.4 Cells, Cell Characteristics and Cell Lines -- 10.5 FDA PAT Initiative -- 10.6 Tools of Modelling -- 10.6.1 Screening of State Variables for Explanatory Correlation with Growth and Productivity -- 10.6.2 Raman Spectrophotometry: Determination of State Variables -- 10.6.3 Flow Cytometry for Determination of Cell Cycle Phases and Organelles -- 10.6.4 Systems Biology in Computational Modelling -- 10.6.5 Regression Analysis and Estimation of Model Constants (Parameters) -- 10.6.6 Data Processing of State Variables -- 10.6.7 Design of Experiments -- 10.7 Modelling of Bioprocesses -- 10.7.1 Growth and Productivity Models -- 10.7.2 Principles Behind Model Formulation. , 10.7.3 Literature Review of Growth Models.
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  • 3
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Cell culture. ; Electronic books.
    Description / Table of Contents: This work present practical, biotechnological applications of flow cytometry techniques for the study of animal, plant and microbial cells, explaining methodologies for sample preparation, staining and analysis. It discusses cell variability in cell culture processes and shows how the quantitative analysis of heterogeneous populations aids in the b.
    Type of Medium: Online Resource
    Pages: 1 online resource (344 pages)
    Edition: 1st ed.
    ISBN: 9781000105292
    DDC: 571.6380724
    Language: English
    Note: Cover -- Title Page -- Copyright Page -- Preface -- Contents -- Contributors -- 1 Monitoring the Proliferative Capacity of Cultured Animal Cells by Cell Cycle Analysis -- 2 Use of Flow Cytometry for Monitoring Antibody Productivity and Isolating High-Secreting Hybridoma Cells -- 3 Antibody Secretion Assays Using Gel Microdrops and Flow Cytometry -- 4 High-Resolution Cell Cycle Analysis of Cell Cycle-Regulated Gene Expression -- 5 Stability of Monoclonal Antibody Production in Hybridoma Cell Culture -- 6 Flow Cytometric Studies of Osmotically Stressed and Sodium Butyrate-Treated Hybridoma Cells -- 7 Flow Cytometric Analysis of Cells Obtained from Human Bone Marrow Cultures -- 8 Measurement of Intracellular pH During the Cultivation of Hybridoma Cells in Batch and Continuous Cultures -- 9 The Relationship Between Intracellular pH and Cell Cycle in Cultured Animal Cells Using SNARF-1 Indicator -- 10 Assessment of Cell Viability in Mammalian Cell Lines -- 11 Analysis of Apoptosis by Flow Cytometry -- 12 Monitoring Βaculovirus Infection and Protein Expression in Insect Cells -- 13 Use of Protein Distribution to Analyze Budding Yeast Population Structure and Cell Cycle Progression -- 14 Cell Cycle Analysis of Microorganisms -- 15 Bacterial Characterization by Flow Cytometry -- 16 Assessment of Viability of Bacteria by Flow Cytometry -- 17 Advances in the Flow Cytometric Characterization of Plant Cells and Tissues -- Index.
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  • 4
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Genetic engineering. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (229 pages)
    Edition: 1st ed.
    ISBN: 9789401143158
    Series Statement: Cell Engineering Series ; v.2
    Language: English
    Note: Cell Engineering -- Editor's page -- Copyright -- Transient Expression Cell Engineering Volume 2 -- Contents -- APPLICATION OF RECOMBINANT BACULOVIRUSES IN BIOPHARMACEUTICAL RESEARCH -- ENGINEERING POST-TRANSLATIONAL PROCESSING OF RECOMBINANT PROTEINS PRODUCED IN INSECT CELL CULTURE -- A GUIDE TO SUCCESSFUL SCALE-UP OF THE BACULOVIRUS EXPRESSION SYSTEM -- TRANSIENT GENE EXPRESSION IN MAMMALIAN CELLS BASED ON THE CALCIUM PHOSPHATE TRANSFECTION METHOD -- ADENOVIRUS VECTORS IN FUNCTIONAL GENOMICS -- ADENO-ASSOCIATED VIRUS: A PROMISING TOOL FOR GENE DELIVERY -- ALPHA VIRUS VECTORS: HIGHLY EFFICIENT SYSTEMS FOR TRANSIENT GENE EXPRESSION -- TRANSIENT EXPRESSION IN MAMMALIAN CELLS: APPLICATIONS AND PERSPECTIVES -- INDEX.
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  • 5
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Apoptosis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (338 pages)
    Edition: 1st ed.
    ISBN: 9781402022173
    Series Statement: Cell Engineering Series ; v.4
    Language: English
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  • 6
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Animal cell biotechnology. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (311 pages)
    Edition: 1st ed.
    ISBN: 9780585379715
    Series Statement: Cell Engineering Series ; v.1
    DDC: 571.936
    Language: English
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Company
    Nature biotechnology 11 (1993), S. 572-579 
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Using FC to optimize in vitro cell culture ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 37 (1992), S. 44-45 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The comparative effects of Pluronic on cell growth of hybridomas were studied. The addition of 0.05% Pluronic decreased the steady-state cell number in continuous culture by about 12% compared to a non-supplemented culture. In short-term experiments, results demonstrated a gradual decrease in cell number with increasing concentration of Pluronic. Such growth inhibition was found to be a result of lowering the rate of DNA synthesis.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 52 (1996), S. 166-175 
    ISSN: 0006-3592
    Keywords: bcl-2 ; apoptosis ; cell culture ; metabolic engineering ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Cell lines derived from the hemopoetic lineages are widely used as hosts for the production of biologicals. These cell lines have been demonstrated to undergo high levels of the active death program commonly referred to as apoptosis. The effects of overexpression of the apoptosis suppressor gene bcl-2 on the properties of a Burkitt lymphoma were compared with the control cell line (transfected with a negative control plasmid) under a variety of conditions relevant to cell culture production technology. In stationary batch cultures, there was a clear reduction in both the rate of total cell death and the level of apoptosis during the decline phase of the bcl-2 transfected cell cultures as compared with that of the control cell cultures. Nutrient analysis revealed that the onset of death during the control cell cultures occurred following complete exhaustion of glutamine. However, the bcl-2 transfected cell cultures continued to grow even though glutamine had been exhausted, and a significant decline in viability only occurred when glucose had also been completely exhausted.When cells were cultured in suspension without prior adaptation, the bcl-2 transfected cells grew significantly better, suggesting that the bcl-2 gene protected the cells from apoptosis triggered by either the lack of substrate or the hydrodynamic environment. Fluorescence microscopy revealed that death of the control cells was almost entirely by apoptosis, whereas death was almost exclusively by necrosis in the delayed decline phase of the transfected cell cultures. In both instances, death occurred before total exhaustion of glucose and glutamine.The induction of apoptosis following growth arrest is a major impediment to the development of culture strategies that optimize specific productivity by reducing the growth rate. Results presented here suggest that suppression of apoptosis by bcl-2 under the condition of excess thymidine allows the maintenance of cells in a growth-arrested state for much longer than would otherwise be possible.When cells were transferred to a range of commercial serum-free media, cell growth was, in all cases, much better for the bcl-2 transfected cell line. Moreover, when cells were cultivated in glutamine-free medium, the control cells exhibited a decrease in viable cell number within the first 24 h whereas, for the bcl-2 transfected cell cultures, viable cell number did not exhibit any clear decrease until after 75 h. Clearly, these results indicate that the metabolic engineering approach can be used to alter advantageously the survival and proliferative capacity of cells in cell culture environments. © 1996 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 54 (1997), S. 1-16 
    ISSN: 0006-3592
    Keywords: apoptosis ; hypoxia ; hyperoxia ; growth arrest ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: TB/C3 hybridoma cells were transected with either pEF-MClneopA or pEF bcl2-MClneopA vectors to produce a control cell line (TB/C3 pEF) and a cell line that overexpresses the “antiapoptotic” human bcl-2 protein (TB/C3 bcl2). Flow cytometry analysis of intracellular bcl-2 protein levels enabled near on-line monitoring of the stability of bcl-2 expression in the absence of drug selection. It was possible to maintain spontaneous selection of cells with the overexpression of bcl-2 protein during semicontinuous cultures at very low dilution rates, where cells were subjected to the selective conditions of nutrient limitation and high toxic metabolite concentrations. Interestingly, cells that overexpressed bcl-2 were adapted to suspension culture conditions significantly faster than control cells. Dual fluorescence staining with acridine orange and propidium iodide allowed for discrimination between viable, apoptotic, secondary necrotic, and necrotic cells, respectively. Compared with the usual trypan blue method of establishing culture viability, dual staining demonstrated that under stressful conditions a significant proportion of cells that excluded trypan blue were also undergoing cell death through apoptosis. In batch cultures the overexpression of bcl-2 more than doubled the membrane intact (MI) cell productive period (the integral of Ml cell density with respect to culture time) and increased the monoclonal antibody (mAb) production by approximately 40% when compared with the control cell line. The overexpression of bcl-2 protein also significantly extended the cell integrity and viability by the suppression of apoptosis in conditions of hypoxia, hyperoxia, glutamine deprivation, glucose deprivation, and serum limitation. The suppression of apoptosis in anaerobic conditions suggests that bcl-2 exerts its antiapoptotic activity by a mechanism that does not involve an oxidative reactive pathway. In conditions of excess thymidine, which suppressed cell proliferation, Ml cell density and specific mAb productivity were further enhanced by the overexpression of bcl-2, which suggests the possibility of accomplishing a controlled proliferation in immortalized cell lines without invoking cell death. Cell size and intracellular mAb were increased for TB/C3 bcl2 cells compared with TB/C3 pEF control cells when analyzed by flow cytometry. © 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 54: 1-16, 1997.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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