TY - JOUR TI - Plasma proteins elevated in severe asthma despite oral steroid use and unrelated to Type-2 inflammation AU - Mikus, M.S. AU - Kolmert, J. AU - Andersson, L.I. AU - Östling, J. AU - Knowles, R.G. AU - Gómez, C. AU - Ericsson, M. AU - Thörngren, J.-O. AU - Khoonsari, P.E. AU - Dahlén, B. AU - Kupczyk, M. AU - de Meulder, B. AU - Auffray, C. AU - Bakke, P.S. AU - Beghe, B. AU - Bel, E.H. AU - Caruso, M. AU - Chanez, P. AU - Chawes, B. AU - Fowler, S.J. AU - Gaga, M. AU - Geiser, T. AU - Gjomarkaj, M. AU - Horváth, I. AU - Howarth, P.H. AU - Johnston, S.L. AU - Joos, G. AU - Krug, N. AU - Montuschi, P. AU - Musial, J. AU - Niżankowska-Mogilnicka, E. AU - Olsson, H.K. AU - Papi, A. AU - Rabe, K.F. AU - Sandström, T. AU - Shaw, D.E. AU - Siafakas, N.M. AU - Uhlén, M. AU - Riley, J.H. AU - Bates, S. AU - Middelveld, R.J.M. AU - Wheelock, C.E. AU - Chung, K.F. AU - Adcock, I.M. AU - Sterk, P.J. AU - Djukanovic, R. AU - Nilsson, P. AU - Dahlén, S.-E. AU - James, A. AU - Ahmed, H. AU - Balgoma, D. AU - Bansal, A.T. AU - Baribaud, F. AU - Bigler, J. AU - Billing, B. AU - Bisgaard, H. AU - Boedigheimer, M.J. AU - Bønnelykke, K. AU - Brandsma, J. AU - Brinkman, P. AU - Bucchioni, E. AU - Burg, D. AU - Bush, A. AU - Chaiboonchoe, A. AU - Checa, T. AU - Compton, C.H. AU - Corfield, J. AU - Cunoosamy, D. AU - D’Amico, A. AU - Emma, R. AU - Erpenbeck, V.J. AU - Erzen, D. AU - Fichtner, K. AU - Fitch, N. AU - Fleming, L.J. AU - Formaggio, E. AU - Frey, U. AU - Gahlemann, M. AU - Goss, V. AU - Guo, Y.-K. AU - Hashimoto, S. AU - Haughney, J. AU - Hedlin, G. AU - Hekking, P.-P.W. AU - Higenbottam, T. AU - Hohlfeld, J.M. AU - Holweg, C.T.J. AU - Knox, A.J. AU - Konradsen, J. AU - Lazarinis, N. AU - Lefaudeux, D. AU - Li, T. AU - Loza, M.J. AU - Lutter, R. AU - Manta, A. AU - Masefield, S. AU - Matthews, J.G. AU - Mazein, A. AU - Meiser, A. AU - Miralpeix, M. AU - Mores, N. AU - Murray, C.S. AU - Myles, D. AU - Naz, S. AU - Nordlund, B. AU - Pahus, L. AU - Pandis, I. AU - Pavlidis, S. AU - Postle, A. AU - Powel, P. AU - Rao, N. AU - Reinke, S. AU - Roberts, A. AU - Roberts, G. AU - Rowe, A. AU - Schofield, J.P.R. AU - Seibold, W. AU - Selby, A. AU - Sigmund, R. AU - Singer, F. AU - Sjödin, M. AU - Skipp, P.J. AU - Sousa, A.R. AU - Sun, K. AU - Thornton, B. AU - Uddin, M. AU - van Aalderen, W.M. AU - van Geest, M. AU - Vestbo, J. AU - Vissing, N.H. AU - Wagener, A.H. AU - Wagers, S.S. AU - Weiszhart, Z. AU - Wheelock, C.E. AU - Wheelock, Å. AU - Wilson, S.J. AU - Yasinska, V. AU - Brusselle, G.G. AU - Campbell, D.A. AU - Contoli, M. AU - Damm, K. AU - de Rudder, I. AU - Delin, I. AU - Devautour, C. AU - Duplaga, M. AU - Eduards, M. AU - Ek, A. AU - Ekström, T. AU - Figiel, E. AU - Gaber, F. AU - Gauw, S. AU - Gawlewicz-Mroczka, A. AU - Gerding, D. AU - Haque, S. AU - Hewitt, L. AU - Hiemstra, P.S. AU - Holgate, S.T. AU - Holloway, J. AU - Kania, A. AU - Kanniess, F. AU - Karlsson, Ö. AU - Kips, J.C. AU - Kumlin, M. AU - Lantz, A.-S. 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AU - U-BIOPRED (Unbiased Biomarkers for the Prediction of Respiratory Disease outcome) Study Group AU - BIOAIR (Longitudinal Assessment of Clinical Course AU - Biomarkers in Severe Chronic Airway Disease) Consortium JO - European Respiratory Journal PY - 2022 VL - 59 TODO - 2 SP - null PB - European Respiratory Society SN - 0903-1936, 1399-3003 TODO - 10.1183/13993003.00142-2021 TODO - alpha 1 antichymotrypsin; apolipoprotein E; C reactive protein; carboxypeptidase; carboxypeptidase A3; complement component C9; complement factor I; glutathione transferase; interleukin 6; macrophage inflammatory protein; macrophage inflammatory protein 3; placebo; plasma protein; prednisolone; receptor activator of nuclear factor kappa B; sphingomyelin phosphodiesterase; sphingomyelin phosphodiesterase 3; transforming growth factor beta; unclassified drug, abnormally high substrate concentration in blood; adult; Article; asthma; body mass; chronic obstructive lung disease; cohort analysis; controlled study; disease association; disease severity; double blind procedure; extracellular matrix; female; human; human cell; inflammation; lipid metabolism; major clinical study; male; middle aged; neutrophil count; phenotype; protein blood level; protein targeting; quality of life; signal transduction; treatment duration; validation study TODO - 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 European Respiratory Society. All rights reserved. ER -