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Development and Validation of Salt Gradient CEX Chromatography Method for Charge Variants Separation and Quantitative Analysis of the IgG mAb-Cetuximab

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Abstract

Ion exchange chromatography is widely used for charge variant analysis of proteins, including monoclonal antibodies. In this study, a simple and robust salt gradient cation exchange chromatography was developed and validated for quantitative determination of cetuximab in biopharmaceutical formulations. For this purpose, we investigated the effect of various parameters including buffer composition, column temperature, pH, gradient volume and flow rate on chromatographic separation of charge variants to achieve the acceptable peak separation, and the optimum condition was selected. Validation of the method was done in accordance with the International Conference on Harmonization (ICH) guidelines. The developed method was found to provide a linear regression over the concentration range of 0.06–2.00 mg mL−1 yielding a correlation coefficient of 0.9972. The limits of detection and quantification for the developed method were 0.02 and 0.06 mg mL−1, respectively. The intra-day and inter-day precision had relative standard deviation values ≤ 2.7%. The robustness of the method was assessed by changes in the applied pH range of buffer, temperature, mobile phase composition, and flow rate. Specificity of the method was confirmed by evaluation of baseline resolution of the mAb variants from product excipients, which showed no interference between excipients and cetuximab. The stability indicating capability of this method was determined using photodegraded, and mechanically and thermally stressed samples. The proposed method could be applied as a simple, precise, and robust quantitative technique which can be reproduced in any labs for the high-throughput quality control and stability assessment of in-process and final product samples.

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Acknowledgements

This work is a part of A. farjami thesis, submitted for Ph.D. degree (no. 117) and supported by Research Council, Tabriz University of Medical Sciences and we would like to thank the CinnaGen Medical Biotechnology Center for kindly providing all of the cetuximab medicinal samples.

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Authors and Affiliations

  1. Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran

    Afsaneh Farjami, Mohammadreza Siahi-Shadbad, Parvin Akbarzadehlaleh & Ommoleila Molavi

  2. Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran

    Afsaneh Farjami & Mohammadreza Siahi-Shadbad

  3. Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran

    Afsaneh Farjami

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  1. Afsaneh Farjami
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  2. Mohammadreza Siahi-Shadbad
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Correspondence to Mohammadreza Siahi-Shadbad.

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Farjami, A., Siahi-Shadbad, M., Akbarzadehlaleh, P. et al. Development and Validation of Salt Gradient CEX Chromatography Method for Charge Variants Separation and Quantitative Analysis of the IgG mAb-Cetuximab. Chromatographia 81, 1649–1660 (2018). https://doi.org/10.1007/s10337-018-3627-9

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  • DOI: https://doi.org/10.1007/s10337-018-3627-9

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