This "lung-on-a-chip" uses electricity to "breathe" and could end the need for animal testing for lung diseases.
April 16, 2026
Original Paper
A microfluidic potassium ion-sensing chip platform incorporating PulmoForge X, a UV-cured biomimetic airway construct based on functionalized human 3D COPD spheroids, for GPCR-targeted natural product screening and efficacy evaluation
SSRN · 6575062
The Takeaway
Testing new drugs for COPD (smoker's lung) usually requires using mice or rats, which often don't react the same way humans do. Researchers created a 3D-printed human airway that lives on a microfluidic chip and uses potassium-sensing sensors to watch the cells react to drugs in real-time. It’s like having a tiny, living human lung that can tell a computer exactly how it's feeling. This practical magic could speed up drug discovery for millions of COPD sufferers and finally move us away from using animals as stand-ins for human lungs. It turns a biological process into a high-speed electronic readout.
From the abstract
Chronic obstructive pulmonary disease (COPD) represents a major public health challenge. G protein-coupled receptors (GPCRs) represent a promising yet underexploited class of therapeutic targets for COPD. However, the lack of robust biological models and high-throughput screening tools capable of rapidly evaluating drug-induced GPCR activity has substantially hindered the development of GPCR-targeted therapies. Here, we report an integrated microphysiological platform for rapid and functionally