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Int. J. Mol. Sci. 2014, 15(4), 6399-6411; doi:10.3390/ijms15046399

Quality Control and Stability Studies with the Monoclonal Antibody, Trastuzumab: Application of 1D- vs. 2D-Gel Electrophoresis

1 Department of Pharmaceutical Chemistry, Medical Faculty, Rr. Bulevardi i Deshmoreve, n.n. 10000 Pristina, Kosovo 2 Department of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
* Author to whom correspondence should be addressed.
Received: 19 December 2013 / Revised: 10 March 2014 / Accepted: 31 March 2014 / Published: 15 April 2014
(This article belongs to the collection Advances in Proteomic Research)
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Recombinant monoclonal antibodies (rmAbs) are medicinal products obtained by rDNA technology. Consequently, like other biopharmaceuticals, they require the extensive and rigorous characterization of the quality attributes, such as identity, structural integrity, purity and stability. The aim of this work was to study the suitability of gel electrophoresis for the assessment of charge heterogeneity, post-translational modifications and the stability of the therapeutic, recombinant monoclonal antibody, trastuzumab. One-dimensional, SDS-PAGE, under reducing and non-reducing conditions, and two-dimensional gel electrophoresis were used for the determination of molecular mass (Mr), the isoelectric point (pI), charge-related isoform patterns and the stability of trastuzumab, subjected to stressed degradation and long-term conditions. For the assessment of the influence of glycosylation in the charge heterogeneity pattern of trastuzumab, an enzymatic deglycosylation study has been performed using N-glycosidase F and sialidase, whereas carboxypeptidase B was used for the lysine truncation study. Experimental data documented that 1D and 2D gel electrophoresis represent fast and easy methods to evaluate the quality of biological medicinal products. Important stability parameters, such as the protein aggregation, can be assessed, as well.
Keywords: trastuzumab; 2D-electophoresis; SDS-PAGE; charge heterogeneity; stability trastuzumab; 2D-electophoresis; SDS-PAGE; charge heterogeneity; stability
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Nebija, D.; Noe, C.R.; Urban, E.; Lachmann, B. Quality Control and Stability Studies with the Monoclonal Antibody, Trastuzumab: Application of 1D- vs. 2D-Gel Electrophoresis. Int. J. Mol. Sci. 2014, 15, 6399-6411.

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