MILAN – Numerous unresolved questions surround progressive pulmonary fibrosis (PPF) treatment, according to Elisabeth Bendstrup, MD, PhD, a researcher and clinical professor in the department of clinical medicine – department of respiratory diseases and allergy, Aarhus (Denmark) University, Denmark. These questions regard the optimal timing for treatment initiation, the role of available medications, either as monotherapy or in combination, and nonpharmacologic support options.
What’s in the toolbox?
Pulmonologists who manage PPF have a range of treatment options at their disposal. This includes careful patient observation, with treatment initiation based on clinical necessity. The therapeutic arsenal comprises immunomodulatory treatments, antifibrotic agents, palliative and supportive care, and, for a minority of patients, lung transplantation.
“Once a patient is diagnosed with PPF, it is important to remember that the diagnostic criteria from the guidelines are not exactly the same of those accepted for the reimbursement of antifibrotic treatments in different countries,” Dr. Bendstrup said, suggesting that nonclinical considerations could also potentially influence the treatment choice. She spoke at the annual congress of the European Respiratory Society.
Michael Kreuter, MD, director of the Lung Center at the University Hospital in Mainz, Germany, provided insight into the introduction of antifibrotic drugs for the treatment of PPF. Drawing from nearly a decade ago when the first antifibrotic medication was approved for idiopathic pulmonary fibrosis (IPF), Dr. Kreuter noted its effectiveness in slowing disease progression, although it does not reverse it. Subsequently, the discovery that non-IPF diseases, such as rheumatoid arthritis, exhibited IPF-like behavior led to the exploration of the use of the same drugs for similar conditions, even if not IPF.
“That’s how antifibrotic treatments came into place. Now we have more trials and data to be discussed in the future,” Dr. Kreuter added. He highlighted that antifibrotic drugs are effective for several diseases. Most of those diseases are treated with different anti-inflammatory drugs, which makes it difficult to decide when to start antifibrotic therapy and how to eventually combine it with different pharmacologic approaches.
A pivotal starting point
a question only partially addressed by existing guidelines. Dr. Bendstrup advocated for a comprehensive baseline evaluation. Factors to be considered include symptom burden, the severity of lung decline, radiologic characteristics, signs of alveolar inflammation, progression risk factors, quality of life, patient preferences, and medical history. “All these should be best discussed in a multidisciplinary team, including pulmonologists, nurses, experts in palliative care, occupational physicians, and more,” she said.
Current guidelines recommend nintedanib for PPF treatment for patients who have failed standard management for fibrotic interstitial lung disease (ILD) other than IPF. However, the definition of “standard management” remains a topic of debate, and it is acknowledged that evidence-based guidance for a standard of care varies among patients. Dr. Bendstrup pointed out the limited guidance clinicians receive from these guidelines. “As clinicians, we are not left with very much help from here.”
Choosing the right approach
Dr. Bendstrup delved into the factors influencing the choice between antifibrotic and anti-inflammatory therapies. This decision hinges on whether the patient presents with a predominantly inflammatory or a fibrotic progressive phenotype. Certain clinical characteristics contribute to the decision. Factors such as younger age, female gender, and the presence of connective tissue disease lean toward an inflammatory phenotype. Radiologic patterns, such as organized pneumonia, hypersensitivity pneumonia, or usual interstitial pneumonia–like patterns also provide valuable clues. Additionally, genetics plays a role, with shorter telomeres indicating a more fibrotic phenotype and an increased risk of immunomodulatory treatment side effects in non-IPF ILDs.