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  • Title: Psychophysical investigations of cetylpyridinium chloride in rats: its inherent taste and modifying effects on salt taste.
    Author: St John SJ, Hallagan LD.
    Journal: Behav Neurosci; 2005 Feb; 119(1):265-79. PubMed ID: 15727531.
    Abstract:
    Salts are transduced by at least 2 mechanisms: (a) antagonized by amiloride and (b) antagonized by cetylpyridinium chloride (CPC). The authors report on 4 behavioral experiments in rats that characterize the orosensory properties of CPC itself as well as its effect in suppressing the intensity of NaCl and KCl taste. Experiments 1 and 2 indicated that CPC has a quinine-like taste quality. Experiments 3 and 4 demonstrated that the recognition of KCl, but not NaCl, is modestly reduced by mixture with CPC. However, control experiments call into question the mechanism of the salt suppression of CPC, because both CPC-salt and quinine-salt mixtures had similar effects. The relevance of these studies for understanding salt and bitter taste coding is discussed.
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