Quantitative antibody-free LC-MS/MS analysis of sTRAIL in sputum and saliva at the sub-ng/mL level

Daniel Wilffert, Riccardo Donzelli, Angela Asselman, Jos Hermans, Natalia Govorukhina, Nick H. T. ten Hacken, Wim J. Quax, Nico Merbel, van de, Rainer Bischoff*

*Corresponding author voor dit werk

OnderzoeksoutputAcademicpeer review

9 Citaten (Scopus)

Samenvatting

Soluble tumor necrosis factor-related apoptosis-inducing ligand (sTRAIL) induces apoptosis via the extrinsic death receptor pathway and maybe a biomarker in the pathogenesis of a broad range of diseases. To investigate the role of sTRAIL in asthma, we developed a quantitative LC-MS/MS method with a lower limit of quantitation (LLOQ) of approximate to 3 pM in induced sputum (174 pg/mL) and saliva (198 pg/mL) without the use of antibodies. sTRAIL was enriched by immobilized metal affinity chromatography (IMAC) solid phase extraction (SPE) followed by tryptic digestion and subsequent enrichment of a signature peptide by strong cation exchange (SCX) SPE. The method was validated with respect to stability, accuracy and precision using the standard addition approach and fully metabolically N-15-labelled hrTRAIL as internal standard. Our results indicate that it is possible to quantify cytokines like sTRAIL at the pM level by LC-MS/MS without the use of antibodies, which has, to our knowledge, never been shown before. (C) 2016 Elsevier B.V. All rights reserved.

Originele taal-2English
Pagina's (van-tot)205-210
Aantal pagina's6
TijdschriftJournal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences
Volume1032
DOI's
StatusPublished - 1-okt.-2016

Vingerafdruk

Duik in de onderzoeksthema's van 'Quantitative antibody-free LC-MS/MS analysis of sTRAIL in sputum and saliva at the sub-ng/mL level'. Samen vormen ze een unieke vingerafdruk.

Citeer dit