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Open AccessArticle

Cannabinoid CB1 Receptors in the Intestinal Epithelium Are Required for Acute Western-Diet Preferences in Mice

1
Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA 92521, USA
2
Department of Medicine, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(9), 2874; https://doi.org/10.3390/nu12092874
Received: 29 August 2020 / Revised: 16 September 2020 / Accepted: 17 September 2020 / Published: 20 September 2020
(This article belongs to the Special Issue Appetite and Satiety Control-Gut Mechanisms)
The endocannabinoid system plays an important role in the intake of palatable food. For example, endocannabinoid signaling in the upper small-intestinal epithelium is increased (i) in rats after tasting dietary fats, which promotes intake of fats, and (ii) in a mouse model of diet-induced obesity, which promotes overeating via impaired nutrient-induced gut–brain satiation signaling. We now utilized a combination of genetic, pharmacological, and behavioral approaches to identify roles for cannabinoid CB1Rs in upper small-intestinal epithelium in preferences for a western-style diet (WD, high-fat/sucrose) versus a standard rodent diet (SD, low-fat/no sucrose). Mice were maintained on SD in automated feeding chambers. During testing, mice were given simultaneous access to SD and WD, and intakes were recorded. Mice displayed large preferences for the WD, which were inhibited by systemic pretreatment with the cannabinoid CB1R antagonist/inverse agonist, AM251, for up to 3 h. We next used our novel intestinal epithelium-specific conditional cannabinoid CB1R-deficient mice (IntCB1−/−) to investigate if intestinal CB1Rs are necessary for WD preferences. Similar to AM251 treatment, preferences for WD were largely absent in IntCB1−/− mice when compared to control mice for up to 6 h. Together, these data suggest that CB1Rs in the murine intestinal epithelium are required for acute WD preferences. View Full-Text
Keywords: endocannabinoid; cannabinoid CB1 receptor; gut–brain; intestine; western diet; preference endocannabinoid; cannabinoid CB1 receptor; gut–brain; intestine; western diet; preference
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Avalos, B.; Argueta, D.A.; Perez, P.A.; Wiley, M.; Wood, C.; DiPatrizio, N.V. Cannabinoid CB1 Receptors in the Intestinal Epithelium Are Required for Acute Western-Diet Preferences in Mice. Nutrients 2020, 12, 2874.

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