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- W4210945251 abstract "In rodents, repeated single-bottle exposures to distinctly flavored isocaloric glucose and fructose solutions, two sugars with different metabolic pathways, eventually lead to a preference for the former. Because Roux-en-Y gastric bypass (RYGB) surgery decreases preference for and intake of sugar solutions in rats, we tested whether RYGB would curtail the conditioning of a preference for a glucose-paired vs. fructose-paired flavor. RYGB (♂ n=11; ♀ n=10) and sham-operated (SHAM; ♂ n=9; ♀ n=10) rats were trained with a single bottle (30 min/day) containing 8% glucose solution flavored with either 0.05% grape or cherry Kool-Aid (Glu/CSG) or 8% fructose solution with the alternative Kool-Aid flavor (Fru/CSF) in an alternating fashion for 8 days. To determine baseline preferences, a 4-day 30-min two-bottle test was used to assess preference for Glu/CSG vs. Fru/CSF before training. After training, 2-day 30-min two-bottle tests assessed preference for the a) Glu/CSG (CSG-flavored 8% glucose solution) vs Fru/CSF (CSF-flavored 8% fructose solution), b) CSG- vs. CSF-flavored mixture of 4% glucose & 4% fructose (isocaloric), c) CSG- vs. CSF-flavored 0.2% saccharin (sweet, no calories), and d) CSG- vs. CSF-flavored water. During training, only male SHAM rats demonstrated progressively increased intake of Glu/CSG over Fru/CSF, and female SHAM rats displayed a trend. RYGB eliminated any difference in single-bottle intake of these solutions during training, regardless of sex. Like their male and female SHAM counterparts, male RYGB rats displayed a conditioned preference for the CSG-associated stimulus in Tests 1-3. Although female RYGB rats displayed acquisition of the conditioned flavor preference in Test 1, unlike the other groups, when the differential sugar cue between the two solutions was removed in Tests 2 and 3, female rats did not display a CSG preference. When the sugar and sweetener cues were both removed on Test 4, all groups displayed some generalization decrement. Thus, RYGB does not compromise the ability of rats to learn and express a glucose- vs. fructose-associated conditioned flavor preference when the exact CS used in training is presented in testing. The mechanistic basis for the sex difference in the effect of RYGB on the generalization decrement observed in this type of flavor preference learning warrants further study." @default.
- W4210945251 created "2022-02-09" @default.
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- W4210945251 date "2022-05-01" @default.
- W4210945251 modified "2023-09-30" @default.
- W4210945251 title "The Effects of Roux-en-Y Gastric Bypass on Glucose- vs. Fructose-Associated Conditioned Flavor Preference" @default.
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- W4210945251 doi "https://doi.org/10.1016/j.physbeh.2022.113730" @default.
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