Sensory-specific satiety is intact in rats made obese on a high-fat high-sugar choice diet

Sensory-specific satiety (SSS) is the temporary decreased pleasantness of a recently eaten food, which inhibits further eating. Evidence is currently mixed whether SSS is weaker in obese people, and whether such difference precedes or follows from the obese state. Animal models allow testing whether...

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Bibliographic Details
Published inAppetite Vol. 112; pp. 196 - 200
Main Author Myers, Kevin P.
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.05.2017
Subjects
Animal model
Animals
Body Weight
Choice Behavior
Diet - adverse effects
Diet - psychology
Diet, High-Fat
Diet-induced obesity
Dietary Fats - adverse effects
Dietary Sugars - adverse effects
Eating
Energy Intake
Female
Food choice
Food Preferences - psychology
Habituation
Obesity - psychology
Pleasure
Random Allocation
Rats, Sprague-Dawley
Satiation
Satiety Response
Sensory-specific satiety
Taste
Taste Perception
Taste preferences
Animal model
Diet-induced obesity
Food choice
Taste preferences
Sensory-specific satiety
Habituation
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Summary:Sensory-specific satiety (SSS) is the temporary decreased pleasantness of a recently eaten food, which inhibits further eating. Evidence is currently mixed whether SSS is weaker in obese people, and whether such difference precedes or follows from the obese state. Animal models allow testing whether diet-induced obesity causes SSS impairment. Female rats (n = 24) were randomly assigned to an obesogenic high-fat, high-sugar choice diet or chow-only control. Tests of SSS involved pre-feeding a single palatable, distinctively-flavored food (cheese- or cocoa-flavored) prior to free choice between both foods. Rats were tested for short-term SSS (2 h pre-feeding immediately followed by 2 h choice) and long-term SSS (3 day pre-feeding prior to choice on day 4). In both short- and long-term tests rats exhibited SSS by shifting preference towards the food not recently eaten. SSS was not impaired in obese rats. On the contrary, in the long-term tests they showed stronger SSS than controls. This demonstrates that neither the obese state nor a history of excess energy consumption fundamentally causes impaired SSS in rats. The putative impaired SSS in obese people may instead reflect a specific predisposition, properties of the obesogenic diet, or history of restrictive dieting and bingeing.
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ISSN:0195-6663
1095-8304
DOI:10.1016/j.appet.2017.01.013