• FGF10 haploinsufficiency causes severe meibomian gland atrophy and impaired tear production in mice.
• FGF10 deficiency leads to dysregulation of immune-related pathways, particularly macrophage and dendritic cell functions.
• CX3CR1-positive immune cells are reduced in Fgf10+/− meibomian glands, suggesting a role in gland development.
• Pharmacological ablation of CSF1R-expressing cells recapitulates MG defects, confirming immune cell involvement.
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