Mouse is a well-accepted model for studying taste bud function. Mice readily detect and respond to taste substances that humans consider to have sweet, bitter, salty, sour and umami taste qualities. A great deal of recent research on taste receptors is based on this species. Live mice are needed for these experiments because no alternative in vitro model incorporates all elements of taste transduction and peripheral signaling. The C57BL/6J strain was selected because these mice respond robustly to many taste stimuli and because of variety of transgenic animals, such as PLCβ2-GFP and GAD67-GFP, were derived from that strain. Prior analyses on behavior, nerve responses, cellular electrophysiology and molecular biology, all conducted on C57BL/6J mice will form a solid foundation for the proposed studies (Finger et al., 2005; Huang and Wu, 2015; Huang et al., 2007). Thus, freshly euthanized animals must be used as a source of taste buds from which we will isolate taste buds and taste cells.
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