Ocular surface mucin

"Ocular surface/mucosa lubrication" is not a single molecular target but rather a physiological process primarily mediated by **mucins**—large glycosylated proteins secreted by goblet cells in the conjunctiva (notably MUC5AC) and membrane-associated mucins on corneal/conjunctival epithelial cells (MUC1, MUC4, MUC16)[1]. These molecules form a hydrophilic barrier that maintains tear film stability and reduces friction during blinking. Artificial tears and ophthalmic lubricants are used therapeutically to mimic or support this function in conditions like dry eye disease. The term "ocular surface/mucosa lubrication" refers broadly to this protective mechanism rather than a discrete druggable protein or receptor. **Note:** This entry is not a canonical molecular target such as an enzyme or receptor; it describes a biological process involving multiple molecules—primarily various **mucin proteins**—and should be mapped instead to specific mucin subtypes if detailed molecular targeting is required[1][2].

Other names

Ocular surface lubricationMucosal lubricationTear film mucinsOcular mucins

Mimic or supplement natural tear film components to reduce friction and maintain hydration[2][3] Stabilize the mucin layer and enhance adherence of aqueous layer to the ocular epithelium[1][2]