Previous research from the investigator's laboratory has focused primarily on the electrical activity of the olfactory receptor neurons. As a result of this research it has become increasingly clear that other cells in the olfactory sensory mucosa may influence the activity of the receptor neurons. These cells are the sustentacular cells and the acinar cells of Bowman's glands. They are generally called secretory cells, although this designation should not rule out other possible functions. For example, sustentacular cells may form a network for intercellular communication within the sensory epithelium as well as participate in the uptake and transport of molecules from the superficial mucus and the blood vascular system. It is the specific aim of the proposed experiments to investigate the properties of these largely-ignored and poorly-understood cells. The short-term objectives are: a. to induce secretion in the sustentacular cells and the acinar cells of Bowan's gland by the application of certain critically selected odorants and pharmacological reagents, b. to study the changes in the membrane properties of the sustentacular cells associated with secretion by using intracellular recording techniques, c. to document the release of secretory material in these cells using microscopic techniques, d. to study the coupling between adjacent sustentacular cells by the intracellular injection of fluorescent dyes and e. to investigate the uptake and distribution of intranasally and intravascularly injected fluorochromes by the sustentacular cells. The results of the proposed experiments will form the experimental basis on which to relate perireceptor processes to the activity of the receptor neurons, to studies of the coding of odor quality and to clinical trials of drug treatment for peripheral rhinitis.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS016340-06
Application #
3396827
Study Section
(SSS)
Project Start
1980-07-01
Project End
1986-06-30
Budget Start
1985-07-01
Budget End
1986-06-30
Support Year
6
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Wayne State University
Department
Type
Schools of Medicine
DUNS #
City
Detroit
State
MI
Country
United States
Zip Code
48202
Kern, R C; Kerr, T P; Getchell, T V (1991) Ultrastructural localization of Na+/K(+)-ATPase in rodent olfactory epithelium. Brain Res 546:8-17
Getchell, T V; Grillo, M; Tate, S S et al. (1990) Expression of catfish amino acid taste receptors in Xenopus oocytes. Neurochem Res 15:449-56
Zielinski, B S; Getchell, M L; Wenokur, R L et al. (1989) Ultrastructural localization and identification of adrenergic and cholinergic nerve terminals in the olfactory mucosa. Anat Rec 225:232-45
Getchell, M L; Bouvet, J F; Finger, T E et al. (1989) Peptidergic regulation of secretory activity in amphibian olfactory mucosa: immunohistochemistry, neural stimulation, and pharmacology. Cell Tissue Res 256:381-9
Zielinski, B S; Getchell, M L; Getchell, T V (1988) Ultrastructural characteristics of sustentacular cells in control and odorant-treated olfactory mucosae of the salamander. Anat Rec 221:769-79
Wang, P M; Kraman, S S (1988) Construction of a flexible airway model for teaching. Anat Rec 221:780-1
el-Bohy, A; Cavanaugh, J M; Getchell, M L et al. (1988) Localization of substance P and neurofilament immunoreactive fibers in the lumbar facet joint capsule and supraspinous ligament of the rabbit. Brain Res 460:379-82
Getchell, T V (1988) Induction of odorant-evoked current transients in Xenopus oocytes injected with mRNA isolated from the olfactory mucosa of Rana pipiens. Neurosci Lett 91:217-21
Getchell, M L; Zielinski, B; DeSimone, J A et al. (1987) Odorant stimulation of secretory and neural processes in the salamander olfactory mucosa. J Comp Physiol A 160:155-68
Joshi, H; Getchell, M L; Zielinski, B et al. (1987) Spectrophotometric determination of cation concentrations in olfactory mucus. Neurosci Lett 82:321-6

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