Dataset Information

Circulating Plasma Biomarkers of Survival in Antifibrotic-Treated Patients With Idiopathic Pulmonary Fibrosis.

ABSTRACT:

Background

A number of circulating plasma biomarkers have been shown to predict survival in patients with idiopathic pulmonary fibrosis (IPF), but most were identified before the use of antifibrotic (AF) therapy in this population. Because pirfenidone and nintedanib have been shown to slow IPF progression and may prolong survival, the role of such biomarkers in AF-treated patients is unclear.

Research question

To determine whether plasma concentration of cancer antigen 125 (CA-125), C-X-C motif chemokine 13 (CXCL13), matrix metalloproteinase 7 (MMP7), surfactant protein D (SP-D), chitinase-3-like protein-1 (YKL-40), vascular cell adhesion protein-1 (VCAM-1), and osteopontin (OPN) is associated with differential transplant-free survival (TFS) in AF-exposed and nonexposed patients with IPF.

Study design and methods

A pooled, multicenter, propensity-matched analysis of IPF patients with and without AF exposure was performed. Optimal thresholds for biomarker dichotomization were identified in each group using iterative Cox regression. Longitudinal biomarker change was assessed in a subset of patients using linear mixed regression modeling. A clinical-molecular signature of IPF TFS was then derived and validated in an independent IPF cohort.

Results

Three hundred twenty-five patients were assessed, of which 68 AF-exposed and 172 nonexposed patients were included after propensity matching. CA-125, CXCL13, MMP7, YKL-40, and OPN predicted differential TFS in AF-exposed patients but at higher thresholds than in AF-nonexposed individuals. Plasma biomarker level generally increased over time in nonexposed patients but remained unchanged in AF-exposed patients. A clinical-molecular signature predicted decreased TFS in AF-exposed patients (hazard ratio [HR], 5.91; 95% CI, 2.25-15.5; P < .001) and maintained this association in an independent AF-exposed cohort (HR, 3.97; 95% CI, 1.62-9.72; P = .003).

Interpretation

Most plasma biomarkers assessed predicted differential TFS in AF-exposed patients with IPF, but at higher thresholds than in nonexposed patients. A clinical-molecular signature of IPF TFS may provide a reliable predictor of outcome risk in AF-treated patients but requires additional research for optimization and validation.

SUBMITTER: Adegunsoye A

PROVIDER: S-EPMC7545483 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Rationale: Two antifibrotic medications, nintedanib and pirfenidone, have been approved for the treatment of idiopathic pulmonary fibrosis (IPF) in the United States. Few data have been published on the use of these medications in clinical practice.Objectives: To investigate patterns of use of antifibrotic medications in the United States.Methods: The Idiopathic Pulmonary Fibrosis Prospective Outcomes (IPF-PRO) Registry, a multicenter U.S. registry, has enrolled patients with IPF that was diagnosed or confirmed at the enrolling center in the past 6 months. Data from patients enrolled from June 5, 2014, to March 4, 2018, were used to determine antifibrotic medication use ("treatment") in the enrollment window and in a follow-up window approximately 6 months later. Associations between patient characteristics and treatment status were tested using logistic regression.Results: Overall, 551 of 782 eligible patients (70.5%) were treated in the enrollment window. Younger age, lower forced vital capacity percentage predicted, oxygen use with activity, worse self-rated health (based on the Short Form 12 or St. George's Respiratory Questionnaire score), referral to the enrolling center by a pulmonologist, use of a lung biopsy in diagnosis, and carrying a diagnosis of IPF to the enrolling center were associated with being treated. Among 534 patients treated at enrollment who had follow-up data, 94.0% remained treated in follow-up. Better self-rated health (based on the Short Form 12 mental component score or EuroQoL score) and not using oxygen with activity at enrollment were associated with continuing treatment in follow-up. Among 172 patients who were untreated at enrollment and had follow-up data, 29.7% started treatment in follow-up. Lower diffusing capacity of the lung for carbon monoxide percentage predicted, a family history of interstitial lung disease, a history of sleep apnea, and a definite diagnosis of IPF at enrollment were associated with starting treatment in follow-up.Conclusions: The majority of patients in the IPF-PRO Registry were receiving an approved medication for IPF at enrollment. Treatment at enrollment was associated with greater disease severity, more compromised quality of life, and the use of oxygen with activity.Clinical trial registered with ClinicalTrials.gov (NCT01915511).