Abstract
Glaucoma is the second leading cause of irreversible blindness worldwide. It is a multifactorial, progressive, chronic optic neuropathy that is characterized by loss of retinal ganglion cells (RGC) and optic nerve head (ONH) cupping including extra cellular matrix (ECM) remodelling and fibrosis at the lamina cribrosa (LC). Clinically this results in chronic, progressive peripheral visual field loss. The pathogenesis of glaucoma is not yet fully understood. Therefore, there is an urgent need to identify and target the underlying mechanisms governing ECM remodelling of the LC, in order to stop the progressive, chronic damage to the LC/ONH and irreversible visual field loss. This review identifies and examines some of the key metabolic processes and cellular sensors involved in the pathogenesis of ECM fibrosis in general but herein specifically in glaucoma, including mitochondrial dysfunction and adenosine monophosphate activated protein kinase (AMPK) upregulation. Furthermore, the development of novel therapeutics such as nicotinamide (NAM) and metformin are discussed as promising potential future therapeutic options for glaucoma.
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