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Isotope labeled internal standards (ILIS) as a basis for quality control in clinical studies using plasma samples

Rezeli, Melinda LU ; Végvári, Ákos LU ; Marko-Varga, György LU and Laurell, Thomas LU (2010) In Journal of Proteomics2008-01-01+01:00 73(6). p.1219-1229
Abstract
For clinical proteomic studies the availability of high quality biofluid samples such as human blood plasma are extremely important. In this study we have investigated the stability of human plasma samples by spiking stable isotope-labeled peptides into the plasma and monitoring their degradation under different storage conditions. FPA-1, C4A and C3f were synthesized with isotopically labeled amino acids, and used as reference peptides. The mixture of internal calibrants was spiked into plasma at the starting point of investigation, mimicking the time of collection for future biobanking efforts, and their qualitative and quantitative changes were analyzed over time by using both MALDI-MS (LTQ Orbitrap XL) and nanoLC-ESI-MS (LTQ XL... (More)
For clinical proteomic studies the availability of high quality biofluid samples such as human blood plasma are extremely important. In this study we have investigated the stability of human plasma samples by spiking stable isotope-labeled peptides into the plasma and monitoring their degradation under different storage conditions. FPA-1, C4A and C3f were synthesized with isotopically labeled amino acids, and used as reference peptides. The mixture of internal calibrants was spiked into plasma at the starting point of investigation, mimicking the time of collection for future biobanking efforts, and their qualitative and quantitative changes were analyzed over time by using both MALDI-MS (LTQ Orbitrap XL) and nanoLC-ESI-MS (LTQ XL ETD).

We have found that all three synthetic peptides were stable in plasma at -20 and -80°C during the examined 2-month period. However, different proteolytic degradation profiles of the peptides were observed at room temperature. We anticipate that the use of these isotope-labeled peptides as internal standards (ILIS) provides a quality control for long-term storage and proteomic plasma analysis. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
human blood plasma, clinical proteomics, mass spectrometry, heavy isotope-labeled peptides
in
Journal of Proteomics2008-01-01+01:00
volume
73
issue
6
pages
1219 - 1229
publisher
Elsevier
external identifiers
  • pmid:20176153
  • wos:000277763800019
  • scopus:77950516712
ISSN
1874-3919
DOI
10.1016/j.jprot.2010.02.012
language
English
LU publication?
yes
id
96460609-825b-4992-8866-d730a58709de (old id 1545323)
date added to LUP
2010-02-22 14:38:47
date last changed
2018-05-29 10:57:06
@article{96460609-825b-4992-8866-d730a58709de,
  abstract     = {For clinical proteomic studies the availability of high quality biofluid samples such as human blood plasma are extremely important. In this study we have investigated the stability of human plasma samples by spiking stable isotope-labeled peptides into the plasma and monitoring their degradation under different storage conditions. FPA-1, C4A and C3f were synthesized with isotopically labeled amino acids, and used as reference peptides. The mixture of internal calibrants was spiked into plasma at the starting point of investigation, mimicking the time of collection for future biobanking efforts, and their qualitative and quantitative changes were analyzed over time by using both MALDI-MS (LTQ Orbitrap XL) and nanoLC-ESI-MS (LTQ XL ETD).<br/><br>
We have found that all three synthetic peptides were stable in plasma at -20 and -80°C during the examined 2-month period. However, different proteolytic degradation profiles of the peptides were observed at room temperature. We anticipate that the use of these isotope-labeled peptides as internal standards (ILIS) provides a quality control for long-term storage and proteomic plasma analysis.},
  author       = {Rezeli, Melinda and Végvári, Ákos and Marko-Varga, György and Laurell, Thomas},
  issn         = {1874-3919},
  keyword      = {human blood plasma,clinical proteomics,mass spectrometry,heavy isotope-labeled peptides},
  language     = {eng},
  number       = {6},
  pages        = {1219--1229},
  publisher    = {Elsevier},
  series       = {Journal of Proteomics2008-01-01+01:00},
  title        = {Isotope labeled internal standards (ILIS) as a basis for quality control in clinical studies using plasma samples},
  url          = {http://dx.doi.org/10.1016/j.jprot.2010.02.012},
  volume       = {73},
  year         = {2010},
}