Characterization of Diseases With Salivary Gland Involvement

Overview

Background: \- Salivary glands in and around the mouth and throat make saliva. Salivary gland disorders can affect a person s quality of life. Studying people who have a disease that affects their salivary gland(s) may teach researchers about the disorders and their genetics. Objectives: \- To study salivary gland diseases and disorders. To collect data and samples from people with salivary gland problems and their relatives. Eligibility: * People more than 4 years old who have or are suspected to have a disease involving salivary glands. * Their relatives more than 4 years old. * Healthy volunteers 18 years or older. Design: * Participants may be screened with: * Medical history * Physical exam * Blood and urine tests * General oral and dental history and exam * Saliva collection * Eye exam and test for dry eyes * Health questionnaires (adults) * Biopsy of some minor salivary glands. A small incision will be made on the inside of the lower lip and several tiny salivary glands will be removed. * Participants will have 2-3 visits. These may include: * Repeats of some screening tests * Ultrasounds of some glands. Researchers will put some gel on the face, then press on it with a smooth wand. * Adults may have other biopsies * A small catheter inserted into the opening of the parotid gland duct on the inside of the cheek. A saline solution (in a syringe) will fill the duct. * Swishing a saltwater solution in the mouth for 10 seconds and then spitting into a cup * Scrapings collected from teeth, tongue, and cheeks

This protocol is intended to allow disease-specific investigations in subjects with presentations of diseases with salivary gland involvement and will enable the collection of data, biological fluids and tissue samples from those subjects, their family members and normal controls, in order to assist our studies of understanding salivary gland disease pathophysiology. The exocrine salivary glands, by secreting saliva, play a critical role in the homeostasis of the oral cavity, which is the initial part of the gastrointestinal track. Several diseases including Parkinson s and systemic amyloidosis can be diagnosed through biopsies of easily accessible salivary glands. Moreover, several drugs and systemic diseases cause salivary gland hypofunction through unknown mechanisms. We may evaluate participants with complaints of dry mouth to determine the cause and severity of their salivary gland dysfunction and their possible eligibility for other NIDCR protocols. Salivary secretions have antibacterial, lubricating, remineralizing, digestive, buffering and cleansing properties. Impaired function of these glands can cause an increase in tooth decay; a variety of oral hard and soft tissue changes, with painful, burning or ulcerated or oral mucosa; problems chewing, swallowing and speaking; and diminished taste and smell. This protocol will provide us with the opportunity to learn from a variety of pathologies that involve directly or indirectly the salivary glands, expand our knowledge about these disorders and provide access to patients of interest for research, teaching, and clinical experience. Information obtained through this protocol may lead to potential innovative therapeutic studies. In addition to its role in investigating individuals who are of interest to the Sjogren s syndrome (SS) and Salivary Gland Dysfunction Unit of the MPTB of NIDCR, this protocol can provide a possible avenue for enrolling subjects from other NIH programs or other NIH protocols that exhibit signs or symptoms associated with the salivary glands dysfunction. Design: This is a single-site, observational, natural history, definition of phenotype, genotype/phenotype correlation; prospective linkage/gene identification study. This study has three groups: Group 1: Well-defined SS subject patients with matched adult healthy volunteers Group 2: SS/other pathology-adults/minors patient subjects and affected and unaffected family members Group 3: Subjects of interest with any cause for salivary gland dysfunction (adults and minors) Outcome Measures: Primary Endpoint: This is primarily a hypothesis generating, descriptive study. This protocol will allow disease-specific investigations to enable the collection of data, tissue, saliva, and blood and urine samples on subjects, their family members and healthy controls, to assist in the understanding of disease pathophysiology. Secondary Endpoints: Mechanistic genetic and inflammatory endpoints will be studied to gain insight into the molecular mechanism of Sjogren's syndrome and other diseases related to salivary gland pathologies to generate hypotheses for future research. The mechanistic outcome measures may include, but will not be limited to, functional studies of epithelial and immune cells, various histologic measures and biomarker studies and generation of iPSC for future therapies. Summary statistics employed may include means, geometric means, minimum and maximum values, standard deviations, 90% confidence limits, medians, and frequencies as appropriate for the measure. Genomic and genetic studies will allow the exploration of genetic alterations that might cause or influence the studied salivary gland pathologies. Exploratory Endpoints: As above