High-Throughput Biophysical Analysis and Data Visualization of Conformational Stability of an IgG1 Monoclonal Antibody After Deglycosylation
| Autor: | Jae Hyun Kim, Ranajoy Majumdar, Sangeeta B. Joshi, C. Russell Middaugh, David D. Weis, Thomas J. Tolbert, David B. Volkin, Mohammad A. Alsenaidy |
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| Rok vydání: | 2013 |
| Předmět: |
Glycan
Circular dichroism Glycosylation Protein Conformation medicine.drug_class Pharmaceutical Science Monoclonal antibody Article Fluorescence spectroscopy chemistry.chemical_compound Data visualization Differential scanning calorimetry medicine Static light scattering Chromatography Calorimetry Differential Scanning biology Protein Stability business.industry Circular Dichroism Temperature Antibodies Monoclonal Hydrogen-Ion Concentration chemistry Immunoglobulin G biology.protein business |
| Zdroj: | Journal of Pharmaceutical Sciences. 102:3942-3956 |
| ISSN: | 0022-3549 |
| DOI: | 10.1002/jps.23730 |
| Popis: | The structural integrity and conformational stability of an IgG1 monoclonal antibody (mAb), after partial or complete enzymatic removal of the N-linked Fc glycan, were compared with the untreated mAb over a wide range of temperature (10°C-90°C) and solution pH (3-8) using circular dichroism, fluorescence spectroscopy, and static light scattering combined with data visualization employing empirical phase diagrams. Subtle-to-larger stability differences between the different glycoforms were observed. Improved detection of physical stability differences was then demonstrated over narrower pH range (4.0-6.0) using smaller temperature increments, especially when combined with an alternative data visualization method (radar plots). Differential scanning calorimetry and differential scanning fluorimetry were then utilized and also showed an improved ability to detect differences in the physical stability of a mAb glycoform. On the basis of these results, a two-step methodology was used in which conformational stability of a mAb glycoform is first screened with a wide variety of instruments and environmental stresses, followed by a second evaluation with optimally sensitive experimental conditions, analytical techniques, and data visualization methods. With this approach, a high-throughput biophysical analysis to assess relatively subtle conformational stability differences in protein glycoforms is demonstrated. |
| Databáze: | OpenAIRE |
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