Due to the molecular complexity of monoclonal antibodies (MAbs) and potential impurities in cell culture media before purification (host-cell proteins, DNA, media components) (1), subsequent downstream operations must consistently and reproducibly purify products to ensure safety and efficacy. The latest member of GE Healthcare’s MabSelect family is called MabSelect SuRe LX (2). As Table 1 shows, it has been developed using the same highly cross-linked agarose base matrix and protein A ligand as for other MAb affinity resins (Table 1).…
Downstream Processing
Production and Purification of a PER.C6-Expressed IgM Antibody Therapeutic
Immunoglobulin G (IgG) antibodies have been used to treat cancer for many years (1). Another class of antibodies—immunoglobulin M (IgM)—has been overlooked in spite of offering unique advantages that make them highly desirable as cancer therapeutics. Serving a valuable function in our innate immune system, IgM antibodies are the first to be secreted when an abnormal cell is present (2). These antibodies play a critical role in recognition and elimination of infectious particles (3,4), in removal of intracellular…
Applied Biosystems® GoPure™ Prepacked Chromatography Columns
Convenient, flexible, and efficient purification of biomolecules
GoPureâ„¢ Pre-packed Columns: A high performance, flexible purification platform
Single-use technologies have been widely utilized in upstream processes for many years. Interest in improving operational efficiency, speeding facility turn around and elimination of product carryover risk is now driving adoption of ready-to-connect filtration and purification modules in downstream processing.For chromatography, performance and flexibility that is equivalent to traditional self-pack columns is a prerequisite for use in multiproduct facilities. This webcast will describe GoPureâ„¢ Pre-packed Chromatography Columns and a custom packing process for third party resins. Case studies will be presented that demonstrate column packing process stability and scalability.
Evaluating Library Databases for Microbial Identification: Critical Aspects and Recommendations
A thorough evaluation process for microbial identification systems should consist of both a technical and financial review, regardless if you are performing internal testing and outsourcing. Assessment of the library database used for microbial identifications is a critical component of evaluating a system or service in its ability to generate accurate identifications. Comprehensive depth of entries, accuracy and coverage of relevant species frequently found in aseptic and sterile manufacturing environments have a significant impact on both performance and cost. Databases…
Efficient Production of Recombinant Antibody Derivatives in Pseudomonas flourescens
P. fluorescens serves as an attractive expression host for the production of stable and biologically active antibody fragments. A proprietary strain of P. fluorescens has been specifi cally developed as a protein production platform to enable rapid identification of strains capable of expressing high titers of soluble, active protein, and refl ects the additional sophistication required of engineered antibody derivatives being developed today. PfÄ“nex Expression TechnologyTM employs a toolbox of defined P. fluorescens strains containing custom-designed combinations of genetic elements…
ATF Perfusion-based Production Platforms for Biopharmaceuticals at Good Grip – Concept s for Robust Control and Operation
Continuous Perfusion is comparatively unpopular rather than considered as a first choice production platform for complex biopharmaceutical glycoproteins. Major concerns that have been addressed are mainly related to risk of process failure during long-term operation, complexity and scalability of cell retention devices, supply and definition of consecutive lots and, finally, handling of continuous harvests in downstream processing. We have cleared-up these stereotypes and designed a robust modular perfusion-based production platform for biopharmaceuticals demanding highest quality at industrial scale. Main components…
When downstream process is able to withstand upstream changes! An example of clarification sequence optimization in viral vaccine production
While improving cell growth and viral productivity in USP, DSP may become the production bottleneck if not able to withstand changes. Such a case appears when optimizing cell culture media during the development of a viral vaccine candidate. Thirty percent expression increased was balanced by twenty percent yield loss and filters clogging during the clarification step. As a consequence, clarification sequence was not scalable anymore for the further manufacturing. The poster describes sanofi pasteur approach to overcome this issue and…
Characterization of a Novel High-Capacity Weak Cation Exchange Resin
Ion exchange resins with increased selectivity and binding capacity are now in demand and it is imperative for chromatographers to have such resins in their repertoire. The Toyopearl GigaCap® family of resins was created to meet these demands. This poster will focus on Toyopearl GigaCap CM-650M resin as a novel high-capacity weak cation exchange resin for the purification of biomolecules. A polymethacrylic base bead, Toyopearl HW-65, was chemically modified with carboxymethyl groups in the 1000Ã… pores of the bead which…
Towards the Use of Statistical Modeling to Predict Cell Culture Performance of Hydrolysates
Hydrolysates are complex media supplements composed of many as well as different types of components. Predicting cell culture performance of a particular lot remains an elusive target, other than by small scale cell culture testing which consumes valuable time, effort and resources. In order to reduce the need for incoming acceptance tests by our customers, FrieslandCampina Domo plans to develop a simple analytical assay that accurately predicts cell culture performance. Our Quality by Design project has provided information at the…
Evaluation of Ultra Performance Size Exclusion Chromatography for the Analysis of Proteins and Higher Order Aggregates
Complete characterization and analysis of biopharmaceuticals includes size exclusion chromatography (SEC) to measure protein aggregates and other size variants. Current silica-based HPLC-SEC methods can be time-consuming and unreliable. New advances in packing materials and instrumentation have allowed faster and more reproducible separations to be achieved. Improvements in resolution, sensitivity and throughput will be demonstrated for sub-2 μm SEC packing materials as compared to traditional silica-based columns. The effect of pore size and particle size for the analysis of aggregates and…