Serum Protein Panel Distinguishes COPD From Asthma
A proteomic study identified biomarkers that separate COPD patients from asthma patients, smokers, and non-smoking controls.
Updated on Nov. 3, 2026 in Asthma
Researchers identified a serum protein biomarker panel that differentiates COPD patients from asthma patients, smokers, and non-smoking controls. The study analyzed 40 serum samples across four groups of 10 subjects each.
Why it matters
Misdiagnosis between COPD and asthma is a persistent challenge, particularly when confounding factors such as smoking are present. A biomarker panel that improves COPD diagnosis under these conditions could support earlier identification and more targeted treatment.
The proteomic analysis identified 1469 serum proteins, with 29 differentially abundant in the COPD group compared with asthma and control groups. Logistic regression models achieved over 80% accuracy in diagnosing COPD, though validation was limited to a sample of 40 subjects.
The details
The team used label-free proteomics on serum from COPD patients, asthma patients, smoker controls, and non-smoker controls. Five proteins, including USP31, RNF10, and TACC2, distinguished COPD from both control groups and asthma patients, while pathway analysis using Reactome and PANTHER linked the altered proteins to COPD pathophysiology.
Health Landscape
The study uses Reactome and PANTHER pathway enrichment, established resources for interpreting large-scale molecular data, to connect serum protein changes to COPD biology. It advances precision medicine efforts by seeking blood-based markers that can distinguish COPD from overlapping respiratory conditions.
If validated in larger studies, a blood-based panel could help clinicians separate COPD from asthma more reliably, especially in patients who smoke. Patients with persistent breathing symptoms may benefit from diagnostic tools that reduce reliance on symptoms alone.
The takeaway
Accurate diagnosis between COPD and asthma matters because treatment plans differ, and biomarker research is working toward tests that can reduce diagnostic uncertainty. Readers with chronic breathing problems should discuss persistent symptoms and smoking history with a clinician.
Further reading
Explore more on Asthma and how respiratory conditions are diagnosed and managed.
Source note: This article includes information reported by Nature.
