» Articles » PMID: 25488689

Biomarker-based Asthma Phenotypes of Corticosteroid Response

Overview
Date 2014 Dec 10
PMID 25488689
Citations 45
Authors
Affiliations
Soon will be listed here.
Abstract

Background: Asthma is a heterogeneous disease with different phenotypes. Inhaled corticosteroid (ICS) therapy is a mainstay of treatment for asthma, but the clinical response to ICSs is variable.

Objective: We hypothesized that a panel of inflammatory biomarkers (ie, fraction of exhaled nitric oxide [Feno], sputum eosinophil count, and urinary bromotyrosine [BrTyr] level) might predict steroid responsiveness.

Methods: The original study from which this analysis originates comprised 2 phases: a steroid-naive phase 1 and a 28-day trial of ICSs (phase 2) during which Feno values, sputum eosinophil counts, and urinary BrTyr levels were measured. The response to ICSs was based on clinical improvements, including a 12% or greater increase in FEV1, a 0.5-point or greater decrease in Asthma Control Questionnaire score, and 2 doubling dose or greater increase in provocative concentration of adenosine 5'-monophosphate causing a 20% decrease in FEV1 (PC20AMP). Healthy control subjects were also evaluated in this study for comparison of biomarkers with those seen in asthmatic patients.

Results: Asthmatic patients had higher than normal Feno values, sputum eosinophil counts, and urinary BrTyr levels during the steroid-naive phase and after ICS therapy. After 28-day trial of ICSs, Feno values decreased in 82% of asthmatic patients, sputum eosinophil counts decreased in 60%, and urinary BrTyr levels decreased in 58%. Each of the biomarkers at the steroid-naive phase had utility for predicting steroid responsiveness, but the combination of high Feno values and high urinary BrTyr levels had the best power (13.3-fold, P < .01) to predict a favorable response to ICS therapy. However, the magnitude of the decrease in biomarker levels was unrelated to the magnitude of clinical response to ICS therapy.

Conclusion: A noninvasive panel of biomarkers in steroid-naive asthmatic patients predicts clinical responsiveness to ICS therapy.

Citing Articles

Breath and Sputum Analyses in Asthmatic Patients: An Overview.

Soccio P, Quarato C, Tondo P, Lacedonia D, Hoxhallari A, Foschino Barbaro M Cells. 2024; 13(16).

PMID: 39195245 PMC: 11353195. DOI: 10.3390/cells13161355.


Discovery and Validation of a Volatile Signature of Eosinophilic Airway Inflammation in Asthma.

Peltrini R, Cordell R, Wilde M, Abuhelal S, Quek E, Zounemat-Kermani N Am J Respir Crit Care Med. 2024; 210(9):1101-1112.

PMID: 38820123 PMC: 11544360. DOI: 10.1164/rccm.202310-1759OC.


Domiciliary monitoring of exhaled nitric oxide in the management of asthma: a pilot study.

Li H, Lin J, Zhang Q, Wang J, Li C BMC Pulm Med. 2024; 24(1):244.

PMID: 38760654 PMC: 11102187. DOI: 10.1186/s12890-024-03031-8.


Eosinophilic Asthma: Pathophysiology and Therapeutic Horizons.

Hussain M, Liu G Cells. 2024; 13(5.

PMID: 38474348 PMC: 10931088. DOI: 10.3390/cells13050384.


Exhaled Nitric Oxide and Olfactory Dysfunction in Patients with Asthma: Association with Chronic Rhinosinusitis.

Oda T, Iwamoto H, Takeno S, Kawasumi T, Takemoto K, Nishida M Medicina (Kaunas). 2023; 59(10).

PMID: 37893494 PMC: 10608782. DOI: 10.3390/medicina59101776.


References
1.
Pavord I, Brightling C, Woltmann G, Wardlaw A . Non-eosinophilic corticosteroid unresponsive asthma. Lancet. 1999; 353(9171):2213-4. DOI: 10.1016/S0140-6736(99)01813-9. View

2.
Brown H . Treatment of chronic asthma with prednisolone; significance of eosinophils in the sputum. Lancet. 1958; 2(7059):1245-7. DOI: 10.1016/s0140-6736(58)91385-0. View

3.
Deykin A, Lazarus S, Fahy J, Wechsler M, Boushey H, Chinchilli V . Sputum eosinophil counts predict asthma control after discontinuation of inhaled corticosteroids. J Allergy Clin Immunol. 2005; 115(4):720-7. DOI: 10.1016/j.jaci.2004.12.1129. View

4.
. ATS/ERS recommendations for standardized procedures for the online and offline measurement of exhaled lower respiratory nitric oxide and nasal nitric oxide, 2005. Am J Respir Crit Care Med. 2005; 171(8):912-30. DOI: 10.1164/rccm.200406-710ST. View

5.
Juniper E, Svensson K, Mork A, Stahl E . Measurement properties and interpretation of three shortened versions of the asthma control questionnaire. Respir Med. 2005; 99(5):553-8. DOI: 10.1016/j.rmed.2004.10.008. View