Sources of technical variability in quantitative LC-MS proteomics: Human brain tissue sample analysis

Paul D. Piehowski, Vladislav A. Petyuk, Daniel J. Orton, Fang Xie, Ronald J. Moore, Manuel Ramirez-Restrepo, Anzhelika Engel, Andrew P. Lieberman, Roger L. Albin, David G. Camp, Richard D. Smith, Amanda J Myers

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

To design a robust quantitative proteomics study, an understanding of both the inherent heterogeneity of the biological samples being studied as well as the technical variability of the proteomics methods and platform is needed. Additionally, accurately identifying the technical steps associated with the largest variability would provide valuable information for the improvement and design of future processing pipelines. We present an experimental strategy that allows for a detailed examination of the variability of the quantitative LC-MS proteomics measurements. By replicating analyses at different stages of processing, various technical components can be estimated and their individual contribution to technical variability can be dissected. This design can be easily adapted to other quantitative proteomics pipelines. Herein, we applied this methodology to our label-free workflow for the processing of human brain tissue. For this application, the pipeline was divided into four critical components: Tissue dissection and homogenization (extraction), protein denaturation followed by trypsin digestion and SPE cleanup (digestion), short-term run-to-run instrumental response fluctuation (instrumental variance), and long-term drift of the quantitative response of the LC-MS/MS platform over the 2 week period of continuous analysis (instrumental stability). From this analysis, we found the following contributions to variability: extraction (72%) instrumental variance (16%) > instrumental stability (8.4%) > digestion (3.1%). Furthermore, the stability of the platform and its suitability for discovery proteomics studies is demonstrated.

Original languageEnglish
Pages (from-to)2128-2137
Number of pages10
JournalJournal of Proteome Research
Volume12
Issue number5
DOIs
StatePublished - May 3 2013

Fingerprint

Proteomics
Brain
Tissue
Digestion
Pipelines
Processing
Protein Denaturation
Dissection
Denaturation
Workflow
Trypsin
Labels
Demography
Proteins

Keywords

  • label-free quantification
  • reproducibility
  • sample preparation
  • study design
  • technical variation
  • tissue analysis

ASJC Scopus subject areas

  • Biochemistry
  • Chemistry(all)

Cite this

Piehowski, P. D., Petyuk, V. A., Orton, D. J., Xie, F., Moore, R. J., Ramirez-Restrepo, M., ... Myers, A. J. (2013). Sources of technical variability in quantitative LC-MS proteomics: Human brain tissue sample analysis. Journal of Proteome Research, 12(5), 2128-2137. https://doi.org/10.1021/pr301146m

Sources of technical variability in quantitative LC-MS proteomics : Human brain tissue sample analysis. / Piehowski, Paul D.; Petyuk, Vladislav A.; Orton, Daniel J.; Xie, Fang; Moore, Ronald J.; Ramirez-Restrepo, Manuel; Engel, Anzhelika; Lieberman, Andrew P.; Albin, Roger L.; Camp, David G.; Smith, Richard D.; Myers, Amanda J.

In: Journal of Proteome Research, Vol. 12, No. 5, 03.05.2013, p. 2128-2137.

Research output: Contribution to journalArticle

Piehowski, PD, Petyuk, VA, Orton, DJ, Xie, F, Moore, RJ, Ramirez-Restrepo, M, Engel, A, Lieberman, AP, Albin, RL, Camp, DG, Smith, RD & Myers, AJ 2013, 'Sources of technical variability in quantitative LC-MS proteomics: Human brain tissue sample analysis', Journal of Proteome Research, vol. 12, no. 5, pp. 2128-2137. https://doi.org/10.1021/pr301146m
Piehowski PD, Petyuk VA, Orton DJ, Xie F, Moore RJ, Ramirez-Restrepo M et al. Sources of technical variability in quantitative LC-MS proteomics: Human brain tissue sample analysis. Journal of Proteome Research. 2013 May 3;12(5):2128-2137. https://doi.org/10.1021/pr301146m
Piehowski, Paul D. ; Petyuk, Vladislav A. ; Orton, Daniel J. ; Xie, Fang ; Moore, Ronald J. ; Ramirez-Restrepo, Manuel ; Engel, Anzhelika ; Lieberman, Andrew P. ; Albin, Roger L. ; Camp, David G. ; Smith, Richard D. ; Myers, Amanda J. / Sources of technical variability in quantitative LC-MS proteomics : Human brain tissue sample analysis. In: Journal of Proteome Research. 2013 ; Vol. 12, No. 5. pp. 2128-2137.
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