TY - JOUR
T1 - Identification of airway mucosal type 2 inflammation by using clinical biomarkers in asthmatic patients
AU - Silkoff, Philip E.
AU - Laviolette, Michel
AU - Singh, Dave
AU - FitzGerald, J. Mark
AU - Kelsen, Steven
AU - Backer, Vibeke
AU - Porsbjerg, Celeste M.
AU - Girodet, Pierre Olivier
AU - Berger, Patrick
AU - Kline, Joel N.
AU - Chupp, Geoffrey
AU - Susulic, Vedrana S.
AU - Barnathan, Elliot S.
AU - Baribaud, Frédéric
AU - Loza, Matthew J.
AU - Strambu, I.
AU - Lam, S.
AU - Eich, A.
AU - Ludwig-Sengpiel, A.
AU - Leigh, R.
AU - Dransfield, M.
AU - Calhoun, W.
AU - Hussaini, A.
AU - Chanez, P.
N1 - Publisher Copyright:
© 2017 American Academy of Allergy, Asthma & Immunology
PY - 2017/9
Y1 - 2017/9
N2 - Background The Airways Disease Endotyping for Personalized Therapeutics (ADEPT) study profiled patients with mild, moderate, and severe asthma and nonatopic healthy control subjects. Objective We explored this data set to define type 2 inflammation based on airway mucosal IL-13–driven gene expression and how this related to clinically accessible biomarkers. Methods IL-13–driven gene expression was evaluated in several human cell lines. We then defined type 2 status in 25 healthy subjects, 28 patients with mild asthma, 29 patients with moderate asthma, and 26 patients with severe asthma based on airway mucosal expression of (1) CCL26 (the most differentially expressed gene), (2) periostin, or (3) a multigene IL-13 in vitro signature (IVS). Clinically accessible biomarkers included fraction of exhaled nitric oxide (FENO) values, blood eosinophil (bEOS) counts, serum CCL26 expression, and serum CCL17 expression. Results Expression of airway mucosal CCL26, periostin, and IL-13–IVS all facilitated segregation of subjects into type 2–high and type 2–low asthmatic groups, but in the ADEPT study population CCL26 expression was optimal. All subjects with high airway mucosal CCL26 expression and moderate-to-severe asthma had FENO values (≥35 ppb) and/or high bEOS counts (≥300 cells/mm3) compared with a minority (36%) of subjects with low airway mucosal CCL26 expression. A combination of FENO values, bEOS counts, and serum CCL17 and CCL26 expression had 100% positive predictive value and 87% negative predictive value for airway mucosal CCL26–high status. Clinical variables did not differ between subjects with type 2–high and type 2–low status. Eosinophilic inflammation was associated with but not limited to airway mucosal type 2 gene expression. Conclusion A panel of clinical biomarkers accurately classified type 2 status based on airway mucosal CCL26, periostin, or IL-13–IVS gene expression. Use of FENO values, bEOS counts, and serum marker levels (eg, CCL26 and CCL17) in combination might allow patient selection for novel type 2 therapeutics.
AB - Background The Airways Disease Endotyping for Personalized Therapeutics (ADEPT) study profiled patients with mild, moderate, and severe asthma and nonatopic healthy control subjects. Objective We explored this data set to define type 2 inflammation based on airway mucosal IL-13–driven gene expression and how this related to clinically accessible biomarkers. Methods IL-13–driven gene expression was evaluated in several human cell lines. We then defined type 2 status in 25 healthy subjects, 28 patients with mild asthma, 29 patients with moderate asthma, and 26 patients with severe asthma based on airway mucosal expression of (1) CCL26 (the most differentially expressed gene), (2) periostin, or (3) a multigene IL-13 in vitro signature (IVS). Clinically accessible biomarkers included fraction of exhaled nitric oxide (FENO) values, blood eosinophil (bEOS) counts, serum CCL26 expression, and serum CCL17 expression. Results Expression of airway mucosal CCL26, periostin, and IL-13–IVS all facilitated segregation of subjects into type 2–high and type 2–low asthmatic groups, but in the ADEPT study population CCL26 expression was optimal. All subjects with high airway mucosal CCL26 expression and moderate-to-severe asthma had FENO values (≥35 ppb) and/or high bEOS counts (≥300 cells/mm3) compared with a minority (36%) of subjects with low airway mucosal CCL26 expression. A combination of FENO values, bEOS counts, and serum CCL17 and CCL26 expression had 100% positive predictive value and 87% negative predictive value for airway mucosal CCL26–high status. Clinical variables did not differ between subjects with type 2–high and type 2–low status. Eosinophilic inflammation was associated with but not limited to airway mucosal type 2 gene expression. Conclusion A panel of clinical biomarkers accurately classified type 2 status based on airway mucosal CCL26, periostin, or IL-13–IVS gene expression. Use of FENO values, bEOS counts, and serum marker levels (eg, CCL26 and CCL17) in combination might allow patient selection for novel type 2 therapeutics.
KW - Asthma
KW - airway mucosal gene expression
KW - biomarkers
KW - phenotypes
KW - type 2 inflammation
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U2 - 10.1016/j.jaci.2016.11.038
DO - 10.1016/j.jaci.2016.11.038
M3 - Article
C2 - 28089872
AN - SCOPUS:85012005446
SN - 0091-6749
VL - 140
SP - 710
EP - 719
JO - Journal of Allergy and Clinical Immunology
JF - Journal of Allergy and Clinical Immunology
IS - 3
ER -