The findings provide the first demonstration of functional olfactory receptors in human taste cells
, suggesting that olfactory receptors may play a role in the taste system by interacting with taste receptor cells on the tongue.
Scientists will continue study whether or not odor receptors are specially located on a specific taste cell
type, for example, sweet- or salt-detecting cells.
Liman's lab used a molecular genetics technique called RNAseq to identify which genes were specifically expressed in sour taste cells
and not other types of taste cells
Two different types of specialized taste cells
contain the chemical receptors and intracellular molecular machinery needed to initiate the perception of taste.
Although these authors confirmed the expression of leptin receptors in taste cells
, they hypothesized that these receptors in taste cells
might be not sufficiently accessible to circulating leptin and that the leptin effect in sweet taste might be through a paracrine route, possibly involving leptin present in saliva.
ENaC are expressed on type I taste cells
of taste buds [7, 8].
Taste buds are comprised of taste cells
with taste nerves interwoven between.
Cockroaches that don't fall for traps' sweet poisons have evolved taste cells
that register sugar as bitter.
Taste perceptions are mediated by receptors on taste cells
usually located in taste buds on specialised papillae in the oropharynx region, but taste receptors are also scattered within the alimentary tract and respiratory passageways (Finger & Kinnamon, 2011).
Stimulation of Taste Cells
by Sweet Taste Compounds.
We have at least five kinds of these chemical-detecting cells (commonly called taste cells
) on our tongues: cells that detect salt, sweet compounds, sour things, bitter things and savory things like meat or broth.
"Sweet taste cells
have turned out to be quite complex," said researcher Dr Karen Yee, from the Monell Chemical Senses Centre in Philadelphia, US.