Targeting α7 Nicotinic Acetylcholine Receptor for Modulating the
Neuroinflammation of Dry Eye Disease via Macrophage
Abstract
Patients with dry eye disease (DED) often exhibit neurological
abnormalities and may even suffer from neuropathic pain and pain-related
anxiety or depression. However, addressing nerve abnormalities in DED
remains a formidable challenge, as current therapies fail to halt
disease progression. Our study found that activating α-7 nicotinic
acetylcholine receptor (α7nAChR), a pivotal regulator in the
anti-inflammatory pathway connecting the nervous and immune systems,
effectively restores corneal epithelium integrity and enhances nerve
sensitivity in DED, pointing to its promising therapeutic potential.
Furthermore, we have revealed that α7nAChR stimulates genes involved in
immune-mediated inflammatory progression and neuroregulation, inhibits
the expression of transient receptor potential vanilloid-1 (TRPV1),
reinstates corneal nerve density, and alleviates anxiety-like behaviors
associated with severe DED by downregulating the proportion of CD86+ M1
macrophages (pro-inflammatory phenotypes). In summary, our findings
underscore the activation of α7nAChR as a pioneering therapeutic
approach for preserving corneal nerves balance and controlling
inflammation in DED.