Background: Some studies have reported a decline in taste sensitivities in patients with Alzheimer's disease. However, the detail remains unknown.
Objective: We investigated the effect of cognitive impairment on taste sensitivity using an App knock-in mouse model of Alzheimer's disease.
Methods: Behavioral assays, a brief access test, and a 48 h two-bottle preference test, to assess taste sensitivities were started from 12 months of age in mice that were confirmed to have impaired cognition.
Results: In the assays, there was no significant difference in taste sensitivities between wild type and App knock-in mice. Additionally, no apparent difference was observed in the expression of taste markers in their taste bud cells.
Conclusion: We concluded that cognitive impairment might not greatly affect taste sensitivity.
Keywords: Aging; App knock-in mice; donepezil; taste sensitivity.