Rationale Asthma phenotyping requires novel biomarker discovery. Objectives To identify plasma biomarkers associated with asthma phenotypes by application of a new proteomic panel to samples from two well-characterised cohorts of severe (SA) and mild-to-moderate (MMA) asthmatics, COPD subjects and healthy controls (HCs). Methods An antibody-based array targeting 177 proteins predominantly involved in pathways relevant to inflammation, lipid metabolism, signal transduction and extracellular matrix was applied to plasma from 525 asthmatics and HCs in the U-BIOPRED cohort, and 142 subjects with asthma and COPD from the validation cohort BIOAIR. Effects of oral corticosteroids (OCS) were determined by a 2-week, placebo-controlled OCS trial in BIOAIR, and confirmed by relation to objective OCS measures in U-BIOPRED. Results In U-BIOPRED, 110 proteins were significantly different, mostly elevated, in SA compared to MMA and HCs. 10 proteins were elevated in SA versus MMA in both U-BIOPRED and BIOAIR (alpha-1-antichymotrypsin, apolipoprotein-E, complement component 9, complement factor I, macrophage inflammatory protein-3, interleukin-6, sphingomyelin phosphodiesterase 3, TNF receptor superfamily member 11a, transforming growth factor-β and glutathione S-transferase). OCS treatment decreased most proteins, yet differences between SA and MMA remained following correction for OCS use. Consensus clustering of U-BIOPRED protein data yielded six clusters associated with asthma control, quality of life, blood neutrophils, high-sensitivity C-reactive protein and body mass index, but not Type-2 inflammatory biomarkers. The mast cell specific enzyme carboxypeptidase A3 was one major contributor to cluster differentiation. Conclusions The plasma proteomic panel revealed previously unexplored yet potentially useful Type-2independent biomarkers and validated several proteins with established involvement in the pathophysiology of SA.

Plasma proteins elevated in severe asthma despite oral steroid use and unrelated to Type-2 inflammation / Mikus, M.S., Kolmert, J., Andersson, L.I., Ostling, J., Knowles, R.G., Gomez, C., Ericsson, M., Thorngren, J.-O., Khoonsari, P.E., Dahlen, B., Kupczyk, M., De Meulder, B., Auffray, C., Bakke, P.S., Beghe', B., Bel, E.H., Caruso, M., Chanez, P., Chawes, B., Fowler, S.J., et al.. - In: EUROPEAN RESPIRATORY JOURNAL. - ISSN 0903-1936. - 59:2(2022), pp. N/A-N/A. [10.1183/13993003.00142-2021]

Plasma proteins elevated in severe asthma despite oral steroid use and unrelated to Type-2 inflammation

Beghe Bianca;
2022

Abstract

Rationale Asthma phenotyping requires novel biomarker discovery. Objectives To identify plasma biomarkers associated with asthma phenotypes by application of a new proteomic panel to samples from two well-characterised cohorts of severe (SA) and mild-to-moderate (MMA) asthmatics, COPD subjects and healthy controls (HCs). Methods An antibody-based array targeting 177 proteins predominantly involved in pathways relevant to inflammation, lipid metabolism, signal transduction and extracellular matrix was applied to plasma from 525 asthmatics and HCs in the U-BIOPRED cohort, and 142 subjects with asthma and COPD from the validation cohort BIOAIR. Effects of oral corticosteroids (OCS) were determined by a 2-week, placebo-controlled OCS trial in BIOAIR, and confirmed by relation to objective OCS measures in U-BIOPRED. Results In U-BIOPRED, 110 proteins were significantly different, mostly elevated, in SA compared to MMA and HCs. 10 proteins were elevated in SA versus MMA in both U-BIOPRED and BIOAIR (alpha-1-antichymotrypsin, apolipoprotein-E, complement component 9, complement factor I, macrophage inflammatory protein-3, interleukin-6, sphingomyelin phosphodiesterase 3, TNF receptor superfamily member 11a, transforming growth factor-β and glutathione S-transferase). OCS treatment decreased most proteins, yet differences between SA and MMA remained following correction for OCS use. Consensus clustering of U-BIOPRED protein data yielded six clusters associated with asthma control, quality of life, blood neutrophils, high-sensitivity C-reactive protein and body mass index, but not Type-2 inflammatory biomarkers. The mast cell specific enzyme carboxypeptidase A3 was one major contributor to cluster differentiation. Conclusions The plasma proteomic panel revealed previously unexplored yet potentially useful Type-2independent biomarkers and validated several proteins with established involvement in the pathophysiology of SA.
2022
59
2
N/A
N/A
Plasma proteins elevated in severe asthma despite oral steroid use and unrelated to Type-2 inflammation / Mikus, M.S., Kolmert, J., Andersson, L.I., Ostling, J., Knowles, R.G., Gomez, C., Ericsson, M., Thorngren, J.-O., Khoonsari, P.E., Dahlen, B., Kupczyk, M., De Meulder, B., Auffray, C., Bakke, P.S., Beghe', B., Bel, E.H., Caruso, M., Chanez, P., Chawes, B., Fowler, S.J., et al.. - In: EUROPEAN RESPIRATORY JOURNAL. - ISSN 0903-1936. - 59:2(2022), pp. N/A-N/A. [10.1183/13993003.00142-2021]
Mikus, M. S.; Kolmert, J.; Andersson, L. I.; Ostling, J.; Knowles, R. G.; Gomez, C.; Ericsson, M.; Thorngren, J. -O.; Khoonsari, P. E.; Dahlen, B.; Ku...espandi
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