User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse




Journal Article

Dilemmas With Absolute Quantification of Pharmacologically Relevant Proteins Using Mass Spectrometry


Wiśniewski,  Jacek R.
Mann, Matthias / Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)

(Publisher version), 395KB

Supplementary Material (public)
There is no public supplementary material available

Wiśniewski, J. R. (2021). Dilemmas With Absolute Quantification of Pharmacologically Relevant Proteins Using Mass Spectrometry. Journal of Pharmaceutical Science, 110(1), 17-21. doi:10.1016/j.xphs.2020.10.034.

Cite as: http://hdl.handle.net/21.11116/0000-0007-D59E-7
Determination of abundances of proteins involved in uptake, distribution, metabolism and excretion of xenobiotics is a prerequisite to understand and predict elimination mechanisms in tissue. Mass spectrometry promises simple and accurate measurements of individual proteins in complex mixtures using isotopically labeled peptide standards. However, comparisons of measurements performed in different laboratories have shown considerable discrepancies in the data generated. Even when very similar approaches are compared, the results differ significantly. An alternative method of measuring protein titers is global proteomics. Depending on sample type, this allows quantification of hundreds to thousands of proteins in a single analysis. It enables system-wide insights by providing protein copy numbers and cell sizes. Regardless of differences, the workflows of both the labeled standard-based and the proteomic approach share several steps. Each can be critical. Selection of optimal techniques is the prerequisite for accurate and reproducible protein quantification. (C) 2020 American Pharmacists Association (R). Published by Elsevier Inc. All rights reserved.