Article (Scientific journals)
Targeted proteomics reveals serum amyloid A variants and alarmins S100A8-S100A9 as key plasma biomarkers of rheumatoid arthritis
Nys, Gwenaël; COBRAIVILLE, Gaël; Servais, Anne-Catherine et al.
2019In Talanta
Peer reviewed
 

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Abstract :
[en] Serum amyloid A (SAA) and S100 (S100A8, S100A9 and S100A12) proteins were previously identified as biomarkers of interest for rheumatoid arthritis (RA). Among SAA family, two closely related isoforms (SAA-1 and SAA-2) are linked to the acute-phase of inflammation. They respectively exist under the form of three (α, β, and γ) and two (α and β) allelic variants. We developed a single run quantitative method for these protein variants and investigated their clinical relevance in the context of RA. The method was developed and validated according to regulations before being applied on plasma coming from RA patients (n = 46), other related inflammatory pathologies (n = 116) and controls (n = 62). Depending on the activity score of RA, SAA1 isoforms (mainly of SAA1α and SAA1β subtypes) were found to be differentially present in plasma revealing their dual role during the development of RA. In addition, the weight of SAA1α in the total SAA response varied from 32 to 80% depending on the pathology studied. A negative correlation between SAA1α and SAA1β was also highlighted for RA early-onset (r = −0.41). SAA2 and S100A8/S100A9 proteins were significantly overexpressed compared to control samples regardless of RA stage. The pathophysiological relevance of these quantitative and qualitative characteristics of the SAA response remains unknown. However, the significant negative correlation observed between SAA1α and SAA1β levels in RA early-onset suggests the existence of still unknown regulatory mechanisms in these diseases.
Disciplines :
Pharmacy, pharmacology & toxicology
Rheumatology
Author, co-author :
Nys, Gwenaël ;  Université de Liège - ULiège > Département de pharmacie > Analyse des médicaments
COBRAIVILLE, Gaël ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de rhumatologie
Servais, Anne-Catherine  ;  Université de Liège - ULiège > Département de pharmacie > Analyse des médicaments
Malaise, Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Rhumatologie
DE SENY, Dominique ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de rhumatologie
Fillet, Marianne  ;  Université de Liège - ULiège > Département de pharmacie > Analyse des médicaments
Language :
English
Title :
Targeted proteomics reveals serum amyloid A variants and alarmins S100A8-S100A9 as key plasma biomarkers of rheumatoid arthritis
Publication date :
01 November 2019
Journal title :
Talanta
Peer reviewed :
Peer reviewed
Available on ORBi :
since 25 July 2019

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