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Volume 17, Number 8, Issue of April 15, 1997 pp. 2852-2858
Copyright ©1997 Society for NeuroscienceDifferential Expression of
-Gustducin in Taste Bud Populations of the Rat and Hamster
Received Nov. 25, 1996; revised Jan. 27, 1997; accepted Jan. 29, 1997.
John D. Boughter Jr., David W. Pumplin, Chengsi Yu, Robert C. Christy, and David V. Smith Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland 21201-1509
The G-protein subunit
-gustducin, which is similar to rod transducin, has been implicated in the transduction of both sweet- and bitter-tasting substances. In rodents, there are differences in sensitivity to sweet and bitter stimuli in different populations of taste buds. Rat fungiform taste buds are more responsive to salts than to sweet stimuli, whereas those on the palate respond predominantly to sweet substances. In contrast, hamster fungiform taste buds are more sensitive to sweet-tasting stimuli. Taste buds in the vallate and foliate papillae of both species are sensitive to bitter compounds. These differences in sensitivity should be reflected in the numbers of gustducin-containing cells in different taste bud populations. We examined taste buds in the rat and hamster for immunoreactivity to an antibody against
Key words: taste receptors; gustation; fungiform papillae; vallate papilla; palate; epiglottis;
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