Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Wistar Kyoto Rats display anhedonia in consumption but retain some sensitivity to the anticipation of palatable solutions

Wright, Rebecca L., Gilmour, Gary and Dwyer, Dominic 2020. Wistar Kyoto Rats display anhedonia in consumption but retain some sensitivity to the anticipation of palatable solutions. Frontiers in Behavioral Neuroscience 14 , 70. 10.3758/s13420-013-0110-1

[img]
Preview
PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview
[img]
Preview
PDF - Supplemental Material
Download (289kB) | Preview

Abstract

The Wistar Kyoto (WKY) rat has been proposed as a model of depression-like symptoms. However, anhedonia—a reduction in the response to normatively rewarding events—as a central depression symptom has yet to be fully assessed in this model. We compared WKY rats and Wistar controls, with stress-susceptibility examined by applying mild unpredictable stress to a subset of each group. Anhedonia-like behavior was assessed using microstructural analysis of licking behavior, where mean lick cluster size reflects hedonic responses. This was combined with tests of anticipatory contrast, where the consumption of a moderately palatable solution (4% sucrose) is suppressed in anticipation of a more palatable solution (32% sucrose). WKY rats displayed greatly attenuated hedonic reactions to sucrose overall, although their reactions retained some sensitivity to differences in sucrose concentration. They displayed normal reductions in consumption in anticipatory contrast, although the effect of contrast on hedonic reactions was greatly blunted. Mild stress produced overall reductions in sucrose consumption, but this was not exacerbated in WKY rats. Moreover, mild stress did not affect hedonic reactions or the effects of contrast. These results confirm that the WKY substrain expresses a direct behavioral analog of anhedonia, which may have utility for increasing mechanistic understanding of depression symptoms.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Publisher: Frontiers Media
ISSN: 1662-5153
Funders: BBSRC
Date of First Compliant Deposit: 20 April 2020
Date of Acceptance: 17 April 2020
Last Modified: 25 Jun 2020 13:09
URI: http://orca.cf.ac.uk/id/eprint/131115

Citation Data

Cited 5 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics