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Ryanodine receptors selectively contribute to the formation of taste‐evoked calcium signals in mouse taste cells
Author(s) -
Rebello Michelle R.,
Medler Kathryn F.
Publication year - 2010
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1111/j.1460-9568.2010.07463.x
Subject(s) - ryanodine receptor , calcium , calcium signaling , microbiology and biotechnology , calcium in biology , signal transduction , taste , receptor , t type calcium channel , neuroscience , chemistry , ryr1 , biology , voltage dependent calcium channel , intracellular , biochemistry , organic chemistry
The peripheral taste system uses multiple signaling pathways to transduce a stimulus into an output signal that activates afferent neurons. All of these signaling pathways depend on transient increases in intracellular calcium, but current understanding of these calcium signals is not well developed. Using molecular and physiological techniques, this study establishes that ryanodine receptors (RyRs), specifically isoform 1, are expressed in taste cells and that their physiological function differs among cell types employing different signaling pathways. RyR1 contributes to some taste‐evoked signals that rely on calcium release from internal stores but can also supplement the calcium signal that is initiated by opening voltage‐gated calcium channels. In taste cells expressing both signaling pathways, RyR1 contributes to the depolarization‐induced calcium signal but not to the calcium signal that depends on calcium release from stores. These data suggest that RyR1 is an important regulator of calcium signaling and that its physiological role in taste cells is dictated by the nature of the calcium signaling mechanisms expressed.