Progressive fibrosing ILD phenotype
18% to 32% of patients with non-IPF ILDs may develop a progressive fibrosing phenotype1
IDENTIFIYING THE PROGRESSIVE FIBROSING ILD PHENOTYPE
In ILDs, the progressive fibrosing phenotype is defined by the presence of:2–5
Increase in extent of fibrosis on HRCT
Worsening respiratory symtoms
Declining lung function
The progressive nature of IPF from diagnosis9
Schematic representation of the natural history of IPF9
Reprinted from Annals of the American Thoracic Society, 183(6), Raghu et al, An Official ATS/ERS/JRS/ALAT Statement: Idiopathic Pulmonary Fibrosis: Evidence-based Guidelines for Diagnosis and Management, p788–824, ©2022
WHAT TYPES OF ILDs CAN DEVELOP A PROGRESSIVE FIBROSING PHENOTYPE?
Types of ILDs that may be associated with a progressive fibrosing phenotype2,5
Current Medical Research and Opinion, 2019, reprinted by permission of the publisher Informa UK Limited trading as Taylor & Francis Ltd.
PREVALENCE OF THE PROGRESSIVE FIBROSING PHENOTYPE IN ILD PATIENTS
THE BURDEN OF PROGRESSIVE FIBROSING ILD CAN SUBSTANTIALLY REDUCE A PATIENT’S HEALTH-RELATED QUALITY OF LIFE3
In patients with progressive fibrosing ILDs, cough, dyspnea and fatigue limit physical functional capacity, as well as the ability to perform basic activities and participate in everyday life3,15–17
In addition to the functional impact, patients with progressive fibrosing ILD may suffer emotional distress, including feelings of depression, loss of independence, and powerlessness.3,15,17–19
Loss of independence
Patients with progressive fibrosing ILDs, such as IPF, HP and CTD-ILD, report almost universal symptoms of anxiety and/or depression.17,19
UNCOVER THE FULL IMPACT OF PROGRESSIVE FIBROSING ILD
Overview of the characteristics and prevalence of the progressive fibrosing phenotype across a wide range of ILDs
Patients with interstitial lung diseases face an unpredictable journey. There are over 200 types of ILDs, of which Idiopathic pulmonary fibrosis, or IPF, is the most common fibrosing type. Around 1 in 5 patients with differing ILD diagnoses may develop a ‘progressive fibrosing phenotype’. Progressive fibrosing ILDs are believed to progress via common pathobiological fibrotic pathways, independent of the original trigger. These progressive fibrosing ILDs are characterised by self-sustaining, diffuse and irreversible fibrosis, worsening respiratory symptoms and declining lung function. The progressive and permanent fibrotic lung damage can place an overwhelming burden on patient’s quality of life and is associated with high mortality. No treatments are currently approved for progressive fibrosing ILDs, other than IPF. Thus, there is a high unmet need for effective treatments that slow the disease progression in these patients. Boehringer Ingelheim has a strong commitment to scientific research. The INBUILD® clinical trial is the first and largest phase III global trial to include patients across the broad spectrum of ILDs that develop the ‘progressive fibrosing phenotype’, into a single trial. So together, we hope to help patients with progressive fibrosing ILDs find new ways forward.
Dr. Nazia Chaudhuri outlines the physical and emotional impacts of the progressive fibrosing phenotype on patients and how it can develop in ILDs regardless of their underlying trigger
My name’s Nazia Chaudhuri, I’m a chest physician and the clinical lead of the Interstitial Lung Disease unit at the Manchester University NHS Foundation trust. I’m also the Chief Investigator of the progressive fibrosing interstitial lung disease clinical trial. What I thought I’d do today first, before I talk to you about the trial is just remind everybody what fibrosis means to a patients and what impact it has on our patients. One of the difficult things I find as a doctor when I have a patient in front of me with fibrosing lung disease, is to actually explain to them that it is an incurable disease and it often is progressive. Our patients will develop progressive breathlessness and cough, as well as anxiety and depression and at the moment, there’s very little evidence-based treatments for progressive interstitial lung disease bar idiopathic pulmonary fibrosis. There are a number of fibrotic lung diseases that look like and behave like IPF. Like IPF, they have a progressive decline and there’s no established treatments to try and halt that decline. Even though the initial trigger may be different, it’s likely that the pathogenetic mechanisms and the end stage fibrosis is the same. These include patients with connective tissue diseases like rheumatoid arthritis that have similar decline and prognosis as idiopathic pulmonary fibrosis. Other conditions include chronic hypersensitivity pneumonitis, sarcoidosis and asbestosis. These conditions can all have progressive declines in their lung function and can have a major impact on patients with symptoms of breathlessness, cough and can ultimately reduce survival.
The first step to slowing progressive fibrosing ILD is identification
Early and regular monitoring
Interventions for ILDs
Pathophysiology of fibrotic ILDs
- * Data based on online surveys with 486 physicians.12
- † Patients diagnosed with ILD other than IPF.
- ‡ Progressive fibrosis was defined as fibrosis detected by HRCT (i.e. reticular abnormality with traction bronchiectasis with or without honeycombing) that was progressive in terms of worsening of lung function (FVC and/or DLCO) and/or respiratory symptoms and/or chest images.
- § Research funded by Boehringer Ingelheim.
- ¶ Estimates of the percentage of patients with non-IPF ILD that develop progressive fibrosis based on an online survey of 486 physicians (243 pulmonologists, 203 rheumatologists and 40 internists) from the United States, Japan, France, Germany, Italy, Spain and the United Kingdom.
- CTD-ILD, connective tissue disease-associated; DLCO, diffusing capacity of the lung for carbon; FVC, forced vital capacity; HP, hypersensitivity pneumonitis; HRCT, high-resolution computed tomography; HRQoL, health-related quality of life; IIP, idiopathic interstitial pneumonia; ILD, interstitial lung disease; iNSIP, idiopathic non-specific interstitial pneumonia; IPF, idiopathic pulmonary fibrosis; PFT, pulmonary function test; RA-ILD, rheumatoid arthritis-associated interstitial lung disease; SSc-ILD, systemic sclerosis-associated interstitial lung disease.
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Cottin V, Wollin L, Fischer A, et al. Fibrosing interstitial lung diseases: knowns and unknowns. Eur Respir Rev. 2019b;28(151):pii:180100.
- Flaherty KR, Brown KK, Wells AU, et al. Design of the PF-ILD trial: A double-blind, randomised, placebo-controlled phase III trial of nintedanib in patients with progressive fibrosing interstitial lung disease. BMJ Open Resp Res. 2017;4(1):e000212.
- Cottin V, Hirani N, Hotchkin D, et al. Presentation, diagnosis and clinical course of the spectrum of progressive-fibrosing interstitial lung diseases. Eur Respir Rev. 2018;27(150):180076. Cottin V, Hirani N, Hotchkin D, et al. Presentation, diagnosis and clinical course of the spectrum of progressive-fibrosing interstitial lung diseases. Eur Respir Rev. 2018;27(150):180076.
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