An advanced laboratory model that mimics the mechanical stresses experienced in human lungs during asthma attacks is providing new insight into how repeated airway constriction may contribute to long-term lung damage. The findings were detailed in the paper, “Mechanical Force-Induced Tissue Remodeling in a Clinically Relevant Microphysiological Model of Asthmatic Human Lungs,” published in Nature Biomedical Engineering.
According to an interdisciplinary team of researchers who conducted the study, the results suggest that physical forces alone can trigger tissue changes associated with severe asthma and may open the door to new therapeutic strategies.
The study centers on a novel microphysiological system equipped with pneumatically controlled soft actuators that recreate the dynamic mechanical loading experienced by lung tissues. By simulating airway narrowing in the distal regions of asthmatic lungs, researchers were able to observe how compressive forces affect living human airway tissues under clinically relevant conditions.
Using their platform, investigators demonstrated that repeated mechanical compression could induce fibrotic airway remodeling, a process in which normal tissue is gradually replaced by scar-like material that stiffens and thickens the airway walls. Such remodeling, they wrote, is a hallmark of chronic asthma and is often associated with worsening symptoms and reduced lung function.
After validating their findings against observations from living organisms, researchers expanded the model to include vascularized airway constructs, allowing them to study changes in blood vessel formation. The experiments revealed that airway constriction-induced fibrosis plays a significant role in promoting the abnormal increase in blood vessels commonly seen in asthmatic airways.
Investigators also conducted proteomic analyses to identify molecules involved in the remodeling process. By pinpointing potential molecular mediators, they were able to evaluate whether pharmaceutical interventions could modify these pathways, highlighting possible targets for future asthma treatments.
The technology could have applications beyond asthma, researchers noted, because mechanical forces influence tissue development and disease throughout the body. The platform may serve as a valuable tool for studying how physical stress contributes to remodeling in other mechanically active organs.
The findings underscore a growing recognition among scientists that biological tissues respond not only to chemical signals but also to physical forces, they emphasized in their abstract. By recreating those forces in the laboratory, researchers said the new model offers a powerful way to investigate disease mechanisms and test potential therapies in human-relevant conditions.
