Abstract
The global obesity epidemic suggests that the high availability of palatable foods, rich in sugar and fat, could contribute to the occurrence of this scenario epidemic. Recent evidence suggests that as with drug addiction, obesity with compulsive eating behaviors involves reward circuitry of the brain, particularly the circuitry involving dopaminergic neural substrates. These findings lead to the theory that some foods, or substances added to them, can trigger an addiction process by activating in the brain the same reward system generated by drugs, the mesolimbic system via dopamine. Dopamine regulates emotional and motivational behavior via the mesolimbic dopaminergic pathway. Individuals with morbid obesity present a reduction in dopamine D2 receptors and may develop resistance to leptin, leading to compulsive eating and thus hampering weight loss. Palatable foods and drugs seem to activate this same circuit of reward and pleasure in the brain, through the release of dopamine.
Running Title (Short Title): Food and Drug Addiction: Dopamine Link
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Abbreviations
- AgRP:
-
Agouti-related peptide
- ARC:
-
Arcuate nucleus
- CNS:
-
Central nervous system
- CCK:
-
Cholecystokinin
- CART:
-
Cocaine- and amphetamine-regulated transcript
- DA:
-
Dopamine
- D1R:
-
Dopamine D1 receptor
- D2R:
-
Dopamine D2 receptor
- DRD4:
-
Dopamine receptor D4
- NPY:
-
Neuropeptide Y
- NAc:
-
Nucleus accumbens
- PYY:
-
Peptide YY
- POMC:
-
Pro-opiomelanocortin
- VTA:
-
Ventral tegmental area
- YFAS:
-
Yale Food Addiction Scale
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Brasiel, P.G., Luquetti, S.C.P.D. (2022). Linking the Features of Food Addiction and Drug Addiction. In: Patel, V.B., Preedy, V.R. (eds) Handbook of Substance Misuse and Addictions. Springer, Cham. https://doi.org/10.1007/978-3-030-67928-6_26-1
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DOI: https://doi.org/10.1007/978-3-030-67928-6_26-1
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