Melanin-Concentrating Hormone Neuronal Regulation in Energy Homeostasis

Melanin-concentrating hormone (MCH) neurons, located predominantly in the lateral hypothalamic area, serve as integrators of peripheral metabolic signals and central reward pathways to govern energy intake and expenditure. These neurons respond dynamically to hormonal cues such as leptin and insulin as well as to nutrient-related stimuli, modulating feeding behaviour, nutrient preference and aspects of glucose and lipid metabolism. Through projections to diverse brain regions, MCH circuits orchestrate both homeostatic and hedonic components of energy balance, influencing meal size, meal frequency and associative learning processes that drive long-term body-weight regulation. Emerging evidence positions MCH signalling as a promising target for interventions aimed at obesity and metabolic disorders.

Research from Nature Portfolio

Recent studies have revealed that MCH neurons exhibit rapid increases in intracellular calcium signalling in response to both discrete food-predictive cues and during consumption. This activity not only correlates with the initiation and maintenance of feeding but also declines over the course of a meal, emphasising a role in appetition and positive-feedback control of intake. Functional manipulation of these neurons via chemogenetic activation enhances cue-driven approach behaviours and enlarges meal size, while also strengthening flavour–nutrient associations. In addition, foundational work has uncovered a specific neural pathway from MCH-expressing hypothalamic neurons to the ventral hippocampus that finely regulates impulsivity. Disruption of this pathway in either direction elevates impulsive responding without affecting timing or general motivation, implicating MCH signalling in the control of decision-making processes that shape feeding behaviour.

Melanin-Concentrating Hormone Neuronal Regulation in Energy Homeostasis publication trend

The graph below shows the total number of articles in melanin-concentrating hormone neuronal regulation in energy homeostasis across all publications each year (not limited to Nature Index journals).

Technical terms

Melanin-concentrating hormone (MCH): A cyclic neuropeptide synthesised by hypothalamic neurons that regulates food intake, energy expenditure and motivated behaviours.

Lateral hypothalamic area (LHA): A region of the hypothalamus enriched with MCH neurons, critical for integrating metabolic and reward signals to control feeding.

Appetition: The positive-feedback component of consummatory behaviour characterised by enhanced eating as a function of ongoing nutrient intake.

Chemogenetic activation: A technique using engineered receptors and synthetic ligands to modulate the activity of specific neuronal populations in vivo.

G protein-coupled receptor (GPCR): A large family of membrane receptors, including MCHR1 and MCHR2, that transduce extracellular signals into intracellular responses via G proteins.

References

1. Hypothalamic melanin-concentrating hormone neurons integrate food-motivated appetitive and consummatory processes in rats. Nature Communications (2023).
2. Mechanisms of ligand recognition and activation of melanin-concentrating hormone receptors. Cell Discovery (2024).
3. Sex differences and sex-specific regulation of motivated behavior by Melanin-concentrating hormone: a short review. Biology of Sex Differences (2024).
4. Hypothalamus-hippocampus circuitry regulates impulsivity via melanin-concentrating hormone. Nature Communications (2019).
5. The Melanin-Concentrating Hormone as an Integrative Peptide Driving Motivated Behaviors. Frontiers in Systems Neuroscience (2017).