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Researchers identify new way to inhibit immune cells that drive allergic asthma

April 1, 2024
in Health
Researchers identify new way to inhibit immune cells that drive allergic asthma
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Researchers identify new way to inhibit immune cells that drive allergic asthma

Activation of ILC2s causes inflammation in mouse lungs (left), but this is reduced by treatment with Yoda1 to stimulate Piezo1 channels (right). Credit: (2024). DOI: 10.1084/jem.20231835

Researchers at the Keck School of Medicine, University of Southern California, have discovered that a protein called Piezo1 prevents a type of immune cell in the lung from becoming hyperactivated by allergens. The study, to be published in the Journal of Experimental Medicine (JEM), suggests that switching on Piezo1 could represent a new therapeutic approach to reducing lung inflammation and treating allergic asthma.

Type 2 innate lymphoid cells (also known as ILC2s) are a type of immune cell that resides in the lungs, skin, and other tissues of the body. ILC2s in the lungs become activated in the presence of allergens and produce proinflammatory signals that drive the recruitment of other immune cells into the lungs. Unchecked, this can result in excessive inflammation and a tightening of the airways, making it difficult for asthma patients to breathe properly.

“Given the importance of ILC2s in allergic asthma, there is an urgent need to develop novel mechanism-based approaches to target these critical drivers of inflammation in the lungs,” says Omid Akbari, Professor of Immunology and Professor of Medicine at USC’s Keck School of Medicine.

Akbari and colleagues discovered that when an allergen activates them, ILC2s start to produce a protein called Piezo1 that can limit their activity. Piezo1 forms channels in the outer membranes of cells that open in response to mechanical changes in the cell’s environment, allowing calcium to enter the cell and change its activity.

Akbari’s team found that, in the absence of Piezo1, mouse ILC2s became more active than normal in response to allergenic signals, and the animals developed increased airway inflammation. In contrast, treatment with a drug called Yoda1 that switches on Piezo1 channels reduced the activity of ILC2s, decreased airway inflammation, and alleviated the symptoms of allergen-exposed mice.

The group’s observations suggest a significant role for Piezo1 channels in ILC2 metabolism, as treatment with Yoda1 reduced ILC2 mitochondrial function and rewired the cells’ energy source.

Finally, the researchers determined that human ILC2s also produce Piezo1, and so they tested the effects of Yoda1 on mice whose ILC2s had been replaced with human immune cells.

“Remarkably, treatment of these humanized mice with Yoda1 reduced airway hyperreactivity and lung inflammation, suggesting that Yoda1 may be used as a therapeutic tool to modulate ILC2 function and alleviate the symptoms associated with ILC2-dependent airway inflammation in humans,” Akbari says. “Future studies are therefore warranted to delineate the role of Piezo1 channels in human patients with asthma and develop Piezo1-driven therapeutics for the treatment of allergic asthma pathogenesis.”

More information:
Benjamin Hurrell et al, Piezo1 Channels Restrain Group 2 Innate Lymphoid Cells and Regulate the Development of Airway Hyperreactivity, Journal of Experimental Medicine (2024). DOI: 10.1084/jem.20231835

Citation:
Researchers identify new way to inhibit immune cells that drive allergic asthma (2024, March 31)
retrieved 1 April 2024
from https://medicalxpress.com/news/2024-03-inhibit-immune-cells-allergic-asthma.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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Copyright for syndicated content belongs to the linked Source : Medical Xpress – https://medicalxpress.com/news/2024-03-inhibit-immune-cells-allergic-asthma.html

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