Article (Scientific journals)
PeptideManager: a peptide selection tool for targeted proteomic studies involving mixed samples from different species.
Demeure, Kevin; DURIEZ, Elodie; Domon, Bruno et al.
2014In Frontiers in Genetics, 5, p. 305
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Keywords :
automated tool; human glioblastoma; mass spectrometry; mixed samples; rodent xenografts; targeted proteomics; unique peptide selection
Abstract :
[en] The search for clinically useful protein biomarkers using advanced mass spectrometry approaches represents a major focus in cancer research. However, the direct analysis of human samples may be challenging due to limited availability, the absence of appropriate control samples, or the large background variability observed in patient material. As an alternative approach, human tumors orthotopically implanted into a different species (xenografts) are clinically relevant models that have proven their utility in pre-clinical research. Patient derived xenografts for glioblastoma have been extensively characterized in our laboratory and have been shown to retain the characteristics of the parental tumor at the phenotypic and genetic level. Such models were also found to adequately mimic the behavior and treatment response of human tumors. The reproducibility of such xenograft models, the possibility to identify their host background and perform tumor-host interaction studies, are major advantages over the direct analysis of human samples. At the proteome level, the analysis of xenograft samples is challenged by the presence of proteins from two different species which, depending on tumor size, type or location, often appear at variable ratios. Any proteomics approach aimed at quantifying proteins within such samples must consider the identification of species specific peptides in order to avoid biases introduced by the host proteome. Here, we present an in-house methodology and tool developed to select peptides used as surrogates for protein candidates from a defined proteome (e.g., human) in a host proteome background (e.g., mouse, rat) suited for a mass spectrometry analysis. The tools presented here are applicable to any species specific proteome, provided a protein database is available. By linking the information from both proteomes, PeptideManager significantly facilitates and expedites the selection of peptides used as surrogates to analyze proteins of interest.
Disciplines :
Oncology
Author, co-author :
Demeure, Kevin;  NorLux Neuro-Oncology Laboratory, Department of Oncology, Centre de Recherche Public de la Santé Luxembourg, Luxembourg.
DURIEZ, Elodie ;  LCP, Luxembourg Clinical Proteomics Center, Centre de Recherche Public de la Santé Strassen, Luxembourg.
Domon, Bruno;  LCP, Luxembourg Clinical Proteomics Center, Centre de Recherche Public de la Santé Strassen, Luxembourg.
NICLOU, Simone P. ;  NorLux Neuro-Oncology Laboratory, Department of Oncology, Centre de Recherche Public de la Santé Luxembourg, Luxembourg.
External co-authors :
yes
Language :
English
Title :
PeptideManager: a peptide selection tool for targeted proteomic studies involving mixed samples from different species.
Publication date :
2014
Journal title :
Frontiers in Genetics
eISSN :
1664-8021
Publisher :
Frontiers Media S.A., Switzerland
Volume :
5
Pages :
305
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 23 February 2024

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