Oral mucosal surfaces and salivary proteins

Oral mucosal surfaces and salivary proteins constitute a complex biological system essential for maintaining oral health and facilitating initial digestive processes. The oral mucosa acts as a physical and immunological barrier, while salivary proteins, including mucins (e.g., MUC5B, MUC7), proline-rich proteins, and antimicrobial peptides like histatins, provide lubrication, buffering, and defense against pathogens (Humphrey & Williamson, 2001, J Prosthet Dent). This system is a primary target for therapies addressing xerostomia (dry mouth), where drugs like pilocarpine stimulate secretion, or mucoadhesive formulations that adhere to the mucosal pellicle for localized drug delivery (Nair & Gopi, 2014, J Basic Clin Pharma). Dysregulation of these components is linked to conditions such as oral mucositis, dental caries, and periodontal disease (NIH, 2023, Oral Health). Understanding the interaction between exogenous compounds and the salivary pellicle—a thin layer of proteins adsorbed onto oral surfaces—is crucial for optimizing topical treatments and protecting the oral cavity from infection and mechanical injury (Vila et al., 2019, Pathogens).

Other names

Oral mucosaSalivary pellicleSalivary proteomeOral cavity liningOral mucosal barrier

Mechanisms include the stimulation of muscarinic M3 receptors in salivary glands to increase protein and fluid output, the physical coating of mucosal surfaces by mucoadhesive polymers to enhance drug residence time, and the antimicrobial action of proteins like lysozyme and lactoferrin against oral pathogens.