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Ja-Hyun Baik  (Baik JH) 2 Articles
Obesity and Metabolism
Dopaminergic Control of the Feeding Circuit
Ja-Hyun Baik
Endocrinol Metab. 2021;36(2):229-239.   Published online April 6, 2021
  • 7,634 View
  • 411 Download
  • 9 Citations
AbstractAbstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM
There is increasing evidence demonstrating that reward-related motivational food intake is closely connected with the brain’s homeostatic system of energy balance and that this interaction might be important in the integrative control of feeding behavior. Dopamine regulates motivational behavior, including feeding behaviors, and the dopamine reward system is recognized as the most prominent system that controls appetite and motivational and emotional drives for food. It appears that the dopamine system exerts a critical role in the control of feeding behavior not only by the reward-related circuit, but also by contributing to the homeostatic circuit of food intake, suggesting that dopamine plays an integrative role across the converging circuitry of control of food intake by linking energy state-associated signals to reward-related behaviors. This review will cover and discuss up-to-date findings on the dopaminergic control of food intake by both the reward-related circuit and the homeostatic hypothalamic system.


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Endocrine Research
Melanocortin 4 Receptor and Dopamine D2 Receptor Expression in Brain Areas Involved in Food Intake
Ye Ran Yoon, Ja-Hyun Baik
Endocrinol Metab. 2015;30(4):576-583.   Published online December 31, 2015
  • 3,888 View
  • 50 Download
  • 14 Citations
AbstractAbstract PDFPubReader   CrossRef-TDMCrossref - TDM

The melanocortin 4 receptor (MC4R) is involved in the regulation of homeostatic energy balance by the hypothalamus. Recent reports showed that MC4R can also control the motivation for food in association with a brain reward system, such as dopamine. We investigated the expression levels of MC4R and the dopamine D2 receptor (D2R), which is known to be related to food rewards, in both the hypothalamus and brain regions involved in food rewards.


We examined the expression levels of D2R and MC4R by dual immunofluorescence histochemistry in hypothalamic regions and in the bed nucleus of the stria terminalis (BNST), the central amygdala, and the ventral tegmental area of transgenic mice expressing enhanced green fluorescent protein under the control of the D2R gene.


In the hypothalamic area, significant coexpression of MC4R and D2R was observed in the arcuate nucleus. We observed a significant coexpression of D2R and MC4R in the BNST, which has been suggested to be an important site for food reward.


We suggest that MC4R and D2R function in the hypothalamus for control of energy homeostasis and that within the brain regions related with rewards, such as the BNST, the melanocortin system works synergistically with dopamine for the integration of food motivation in the control of feeding behaviors.


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Endocrinol Metab : Endocrinology and Metabolism