Corneal metabolic enzymes

Corneal metabolic enzymes, primarily located within the corneal epithelial cells, represent a critical biochemical barrier and a site for prodrug bioactivation in ophthalmic therapy [PMID: 29890125]. The most abundant enzyme in the human corneal epithelium is Aldehyde Dehydrogenase 3A1 (ALDH3A1), which constitutes a significant portion of the soluble protein and serves a protective role by detoxifying reactive aldehydes generated by UV-induced lipid peroxidation [UniProt P30837, PMID: 26755311]. In the context of pharmacology, the corneal epithelium is the primary site for the bioactivation of various ophthalmic prodrugs, particularly prostaglandin analogs like latanoprost and travoprost, which are hydrolyzed by local esterases into their active acid forms to reduce intraocular pressure [PMID: 3901111, PubChem CID 5311221]. Additionally, the corneal epithelium expresses receptors for growth factors, making it a direct therapeutic target for agents like cenegermin (recombinant human nerve growth factor) used to treat neurotrophic keratitis [PMID: 30642849]. Because the metabolic profile of the cornea differs significantly from systemic organs like the liver—favoring hydrolytic over oxidative pathways—understanding these enzymes is vital for optimizing drug delivery and predicting the ocular pharmacokinetics of topical medications [PMID: 29890125].

Other names

Corneal epithelial cells / corneal metabolic enzymesOcular drug-metabolizing enzymesCorneal enzymesCorneal esterasesCorneal crystallins

Bioactivation of prodrugs via ester hydrolysis; detoxification of reactive aldehydes; growth factor-mediated epithelial repair and regeneration.