Mucins are the primary secretory component of salivary mucous glands, such as the major sublingual gland and many' of the minor salivary glands. Protective functions which have been attributed to mucins include: 1) lubrication and hydration of oral surfaces; 2) selection for the adherence as well as clearance of -specific micro-organisms; and 3) modulation of the pellicle lipid content through either covalently-bound fatty acids or through non-covalent, heterotypic complexation. Within mucous glands, mucins are synthesized and secreted by the mucous cell phenotype. The study of the molecular mechanisms which regulate the synthesis and secretion of mucins have been hindered by the cellular heterogeneity of salivary mucous glands which greatly complicates the isolation and study of cell-specific molecules and intracellular reactions. An exception is the guinea pig sublingual gland which-is composed entirely of mucous acinar structures and therefore represents an important potential model to study mucous cell biology unencumbered by other contaminating acinar cell types. We currently are studying the regulation of mucin glycoprotein secretion from acinar structures in vitro derived by enzymatic dispersion of rat sublingual glands. Dispersed: acinar structures are extremely viable and pharmacologically responsive to different secretagogues but are composed of both mucous cells and serous demilune cells. Therefore, we plan to develop a similar in vitro model using guinea pig sublingual glands, We plan-to evaluate the cell model morphologically by light microscopy to determine cell viability and mucous cell composition. Pharmacological studies will be conducted to demonstrate the presence of a regulated muscarinic-cholinergic pathway. Results from these studies will be used as preliminary studies for a formal R01 application with the primary objectives of elucidating components of the intracellular signalling pathways in mucous cells.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Small Research Grants (R03)
Project #
1R03DE010005-01
Application #
3425639
Study Section
NIDCR Special Grants Review Committee (DSR)
Project Start
1991-08-01
Project End
1992-07-31
Budget Start
1991-08-01
Budget End
1992-07-31
Support Year
1
Fiscal Year
1991
Total Cost
Indirect Cost
Name
University of Rochester
Department
Type
Schools of Dentistry
DUNS #
208469486
City
Rochester
State
NY
Country
United States
Zip Code
14627
Webster-Cyriaque, J; Raab-Traub, N (1998) Transcription of Epstein-Barr virus latent cycle genes in oral hairy leukoplakia. Virology 248:53-65
Webster-Cyriaque, J; Edwards, R H; Quinlivan, E B et al. (1997) Epstein-Barr virus and human herpesvirus 8 prevalence in human immunodeficiency virus-associated oral mucosal lesions. J Infect Dis 175:1324-32