Search Results for: antibody characterization

Mitigate Risk with Effector Function Characterization for Antibody Therapeutics

The complexities of biomanufacturing combined with heterogeneity introduced by cellular expression systems present significant challenges to assessing the quality of biologics such as monoclonal antibodies (MAbs). Information related to the critical quality attributes (CQAs) of MAb drug candidates is unknown during early phase drug development. It must be established empirically by physical, structural, and functional analyses as early as possible to accelerate development and mitigate risk through greater understanding of product characteristics. High-resolution analytical techniques are required to answer questions…

Characterization and Lot Release Assays for Antibody Drug Conjugates

Antibody-drug conjugates (ADCs) add an additional level of challenge to testing of biotherapeutics. Besides the antibody, which needs to be evaluated for potential and known mechanisms of action (MoA), there is a cytostatic compound conjugated that alters the behavior of the antibody-vehicle within the typical assays. Therefore, characterization of new innovators as well as biosimilarity assessment is even more challenging than it is for antibody therapeutics. Using the example of Trastuzumab emtansine, Charles River has set up a panel of…

Uniting Small-Molecule and Biologic Drug Perspectives: Analytical Characterization and Regulatory Considerations for Antibody–Drug Conjugates

Cosponsored by CASSS (an international separation science society) and the US Food and Drug Administration (FDA), the January 2010 CMC Strategy Forum explored antibody–drug conjugates (ADCs), which are monoclonal antibodies (MAbs) coupled to cytotoxic agents. The ADC platform of products is being used more and more for clinical evaluation in oncology. More than a dozen companies are developing several types, including products conjugated with calicheamicin, auristatins, and maytansinoids. Such products use the specificity of a MAb to deliver a cytotoxic…

Antibody and Protein Therapeutic Kinetic Characterization in Bioprocessing

Figure 1. There are a variety of affinity tag-protein strategies, and the use of affinity tags depends on the target protein, the expression system, and the application. The Octet QK and Octet RED systems provide an easy-to-use, label-free, high-throughput system to capture affinity-tagged biologics for quantitative or kinetic biomolecular interaction analysis. Kinetic characterization of biologics during clone selection, screening, and development is critical at all stages of therapeutic engineering and bioprocessing. Key Applications Quantitative kinetic characterization (kobs′ ka′ kd′ KD…

Challenges Of Host Cell Protein Analysis With ELISA And How To Obtain Better Coverage Of Your ELISA Antibody Reagents

Why is host cell protein (HCP) detection and removal so critical when manufacturing biologics? Product purity and, most importantly, patient safety depends on it. Sandwich ELISA has been a favored method for HCP testing due to its high sensitivity and high throughput, but challenges and limitations exist. Coverage depends strongly on the use of antibody reagents that adequately detect and capture HCPs. In this webinar, we address effective techniques for both optimizing HCP ELISA coverage through the selection of reagents…

Identification of Host Cell Protein (HCP) Impurities using Antibody Affinity Extraction and Mass Spectrometry Approach

This webcast features: Eric Bishop, Vice President of Research & Development, Cygnus Technologies A well-developed, broadly reactive, and qualified HCP ELISA remains a gold standard method effectively used during the purification process to ensure removal of HCP and to demonstrate process consistency and final drug substance purity. Unfortunately, the ELISA does not inform which HCPs are present or to which HCPs the assay reacts. Mass Spectrometry (MS) is a powerful tool for identifying those HCPs that persist through downstream purification…

Characterization Platform for Structural and Functional Feature Investigation of Bispecific Molecules

Bispecific antibodies (BsAbs ) bind to two or more targets which could be different antigens or different epitopes. Structurally, one type of bispecific antibody is similar to an IgG which contains an Fc region, and other bispecifics do not have an Fc region and typically have a relatively small molecular weight. Therefore, the characterization for a bispecific is more challenging than for a typical monoclonal antibody because of this variation in structure. The poster here discusses a set of platform…

Monoclonal Antibody Aggregate Polish and Viral Clearance Using Hydrophobic-Interaction Chromatography

Hydrophobic Interaction chromatography (HIC) is a powerful polishing tool for the downstream purification and manufacture of biotherapeutics. HIC offers orthogonal selectivity for the clearance of difficult process and product-related impurities such as aggregates, host cell proteins and endogenous and adventitious viruses.  In this study, a family of POROS HIC resins with novel ethyl and benzyl chemistries was used to successfully polish two clinical stage monoclonal antibodies harboring very high levels of product aggregation (>10%). In addition to aggregate removal, viral…

Step-wise strategy to address process characterization and late phase development – toward the definition of a standardized approach

Drivers for process characterization and late phase development include improving process understanding, enhancing process robustness, and assurance that the process delivers consistent product quality within all Proven Acceptable Ranges (PARs). Regulator’s expectations for biologic submissions include the application of statistical methods to improve the confidence of the PARs and knowledge of the design space for a process. Different approaches have been reported for process characterization but contain common elements including risk assessment, scale-down model qualification, and statistical design of experiments.…

Speeding Characterization of Biologics: Replace Traditional Assay Technologies with Label-Free Quantification and Kinetics

FortéBio’s Octet instruments are an ideal replacement for ELISA, HPLC, and SPR techniques in quantification of antibodies and recombinant proteins and in testing product potency for lot release. Bio-Layer Interferometry (BLI) technology monitors biomolecular interactions in real time to determine affinity, kinetics, and concentration. The plate-based, microfluidics-free format offers users several distinct advantages over other technologies. BLI-based systems can achieve higher throughput, with the flexibility to measure two to 96 samples simultaneously. Lower maintenance requirements and increased ease-of-use further shorten…