Determination of the Density of Protein Particles Using a Suspended Microchannel Resonator

Folzer, Emilien and Khan, Tarik and Schmidt, Roland and Finkler, Christof and Huwyler, Jörg and Mahler, Hanns-Christian and Koulov, Atanas V.. (2015) Determination of the Density of Protein Particles Using a Suspended Microchannel Resonator. Journal of pharmaceutical sciences, 104 (12). pp. 4034-4040.

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Official URL: http://edoc.unibas.ch/40956/

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One of the analytical tools for characterization of subvisible particles, which gained popularity over the last years because of its unique capabilities, is the resonance mass measurement technique. However, a challenge that this technique presents is the need to know the exact density of the measured particles in order to obtain accurate size calculations. The density of proteinaceous subvisible particles has not been measured experimentally yet and to date researchers have been using estimated density values. In this paper, we report for a first-time experimental measurements of the density of protein particles (0.2-5 μm in size) using particles created by stressing three different proteins using four different types of stress conditions. Interestingly, the particle density values that were measured varied between 1.28 and 1.33 g/cm(3) and were lower than previous estimates. Furthermore, it was found that although the density of proteinaceous particles was affected to a very low degree by the stress conditions used to generate them, there is relatively larger difference between particles originating from different classes of proteins (e.g., monoclonal antibody vs. bovine serum albumin).
Faculties and Departments:05 Faculty of Science > Departement Pharmazeutische Wissenschaften > Pharmazie > Pharmaceutical Technology (Huwyler)
UniBasel Contributors:Huwyler, Jörg and Folzer, Emilien
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Pharmaceutical Association
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:11 Aug 2016 09:01
Deposited On:11 Aug 2016 09:01

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