Mechanical stress during asthma attacks triggers permanent structural changes in airway tissue, including fibrosis and angiogenesis, independent of inflammatory responses. According to research published in Nature Biomedical Engineering and led by Binghamton University, these physical forces cause an overproduction of extracellular matrix proteins.
How Mechanical Stress Triggers Tissue Damage
While asthma is traditionally managed as an inflammatory condition fueled by allergens and environmental triggers, new research indicates that the physical deformation of lung tissue is a factor in disease progression. By using lung-on-a-chip technology, researchers observed that the repeated expansion and contraction of airways during an attack forces cells to remodel their environment. This process leads to the overproduction of the extracellular matrix—the structural scaffolding that supports cells—resulting in permanent tissue scarring and the growth of new blood vessels, known as angiogenesis.
Approximately 25 million people in the US are diagnosed with asthma. This research highlights a lesser-studied side effect of the physical forces involved in an attack.
What Is Lung-on-a-Chip Technology?
To isolate the effects of mechanical stress, the research team employed organ-on-a-chip technology. This microfluidic device replicates human lung conditions by culturing cells on a platform that can be pressurized or evacuated to simulate the structural deformation of an asthma attack. According to Jungwook “Jay” Paek, assistant professor at Binghamton University, this approach provides the first demonstration of the effect of a mechanical process on tissue remodeling—including both fibrosis and angiogenesis—in asthma patients.
The device allows scientists to move beyond traditional petri-dish models. By incorporating elements of biological, biomedical, electrical, and mechanical engineering, the team created a platform that mimics the dynamic, three-dimensional environment of a human lung. PhD student Anika Alim noted that this technology offers a view of how our human body actually functions when asthma attacks happen.
Can Future Treatments Target Mechanical Forces?
The ability to observe cellular activity under mechanical stress opens new avenues for pharmaceutical development. Researchers used the microfluidic device to test how medications might modulate cellular activity during an attack. Because this study suggests that tissue remodeling occurs independently of inflammation, these observations may lay the foundation for future asthma treatments that address tissue remodeling.
This study represents a multi-institutional effort, involving collaborators from the University of Pennsylvania, the University of Toledo, and the Pacific Northwest National Laboratory. The work builds on broader research at Binghamton University, which also investigates Parkinson’s disease and other neurodegenerative conditions, supported by a grant from the National Institutes of Health (NIH).
Frequently Asked Questions
Does inflammation cause all asthma-related lung damage?
No. While asthma is typically associated with chronic lung inflammation, this research demonstrates that mechanical stress from asthma attacks causes tissue damage independently of inflammation.
How does lung-on-a-chip technology work?
It uses microfabrication techniques to reproduce human physiological conditions using a small culture of cells. The device can be mechanically stretched or compressed by pressurizing or evacuating a connecting chamber to mimic the physical forces exerted on lungs during an asthma attack.
Why is this research important for future asthma patients?
By identifying mechanical stress as a cause of tissue remodeling, these observations may lay the foundation for future asthma treatments that address tissue remodeling.
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