Very interesting communication in NATURE (all the journals are corrupted but have nuggets); Bai et al. Mechanical control of innate immune responses; can we fight off viruses simply by breathing?
by Paul Alexander
Intuitively it makes sense but we need to study further; maybe it always worked this way; 'Mechanical control of innate immune responses against viral infection revealed in a human lung alveolus chip'
“Mechanical breathing motions have a fundamental function in lung development and disease, but little is known about how they contribute to host innate immunity. Here we use a human lung alveolus chip that experiences cyclic breathing-like deformations to investigate whether physical forces inﬂuence innate immune responses to viral infection. Inﬂuenza H3N2 infection of mechanically active chips induces a cascade of host responses including increased lung permeability, apoptosis, cell regeneration, cytokines production, and recruitment of circulating immune cells. Comparison with static chips reveals that breathing motions suppress viral replication by activating protective innate immune responses in epithelial and endothelial cells, which are mediated in part through activation of the mechanosensitive ion channel TRPV4 and signaling via receptor for advanced glycation end products (RAGE).”…