Chemical Senses, Vol 23, 283-293, Copyright © 1998 by Oxford University Press
TA Gilbertson and H Zhang
The transduction of sodium salts occurs through a variety of mechanisms,
including sodium influx through amiloride-sensitive sodium channels,
anion-dependent sodium movement through intercellular junctions and
unidentified amiloride-insensitive mechanisms. Characterizations of sodium
transport in lingual epithelium mounted in Ussing chambers have focused
almost exclusively on epithelia containing only fungiform taste buds. In
the present study we have investigated sodium transport by measuring
NaCl-induced short-circuit current from lingual epithelia containing
fungiform, foliate, vallate and palatine taste buds in the hamster and the
rat. All areas show measurable sodium transport, yet significant
differences were noted between the epithelia from the rat and the hamster
and among the different epithelia within a single species in terms of
current density, transepithelial resistance and mucosal amiloride
sensitivity. In general, epithelia from the anterior tongue were of a lower
resistance and transported sodium more effectively than from the posterior
tongue. Moreover, fungiform- and vallate-containing epithelia in the rat
had a greater current density than did the corresponding tissues in the
hamster. Amiloride sensitivity also differed between the rat and the
hamster. In the hamster all gustatory areas showed some amiloride
sensitivity, while in the rat the vallate-containing epithelia were devoid
of amiloride- sensitive sodium transport. The results are consistent with
the interpretation that all chemosensitive areas may participate in the
detection of salts but the degree of salt transport and the mechanism of
transport is variable among different lingual epithelia and different
species.
ARTICLES
Characterization of sodium transport in gustatory epithelia from the hamster and rat
Pennington Biomedical Research Center, Louisiana State University, Baton Rouge 70808-4124, USA.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  A. C. Spector and S. P. Travers The representation of taste quality in the Mammalian nervous system. Behav Cogn Neurosci Rev, September 1, 2005; 4(3): 143 - 191. [Abstract] [PDF]
|
|
|
|
 |
|
 S. D. Hillyard, J. Goldstein, W. Tuttle, and K. Hoff Transcellular and Paracellular Elements of Salt Chemosensation in Toad Skin Chem Senses, November 1, 2004; 29(9): 755 - 762. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 V. Danilova, Y. Danilov, T. Roberts, J.-M. Tinti, C. Nofre, and G. Hellekant Sense of Taste in a New World Monkey, the Common Marmoset: Recordings From the Chorda Tympani and Glossopharyngeal Nerves J Neurophysiol, August 1, 2002; 88(2): 579 - 594. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. K. Baker, K. Rios, and S. D. Hillyard Electrophysiological properties of the tongue epithelium of the toad Bufo marinus J. Exp. Biol., July 1, 2002; 205(13): 1943 - 1952. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. A. Gilbertson, J. D. Boughter Jr, H. Zhang, and D. V. Smith Distribution of Gustatory Sensitivities in Rat Taste Cells: Whole-Cell Responses to Apical Chemical Stimulation J. Neurosci., July 1, 2001; 21(13): 4931 - 4941. [Abstract] [Full Text] [PDF]
|
|