Neural Regulation of Adipose Tissue Metabolism

Adipose tissue metabolism is regulated by intricate neural circuits that integrate central commands and peripheral feedback to maintain energy homeostasis. Hypothalamic nuclei integrate hormonal and neural cues, coordinating sympathetic outflow according to nutrient status and temperature. Sympathetic efferent fibres release norepinephrine at adipocyte junctions, triggering lipolysis in white adipose tissue and thermogenesis in brown and beige depots. In parallel, somatosensory afferents relay local metabolic status and adipokine signals to the central nervous system, forming a bidirectional communication network. Neural plasticity within adipose depots, driven by neurotrophic factors, allows dynamic remodelling of innervation density in response to environmental cues such as cold exposure. This interplay between efferent and afferent signals influences adipocyte differentiation, mitochondrial activity and adipokine secretion, thereby shaping systemic glucose and lipid metabolism. Dysregulation of adipose innervation has been implicated in obesity, insulin resistance and age-related metabolic decline, highlighting the potential of targeting neural pathways for therapeutic interventions.

Research from Nature Portfolio

Emerging work has elucidated the role of sensory neurons originating in dorsal root ganglia in restraining sympathetic drive to adipose tissue. Selective ablation of these somatosensory fibres enhances lipogenic and thermogenic programmes, revealing a reciprocal modulation of sympathetic output. Another study identified neurotrophin-3 as an adipokine that promotes sympathetic neurite growth via its receptor TrkC. Overexpression of this factor increases adipose innervation, augments beige adipocyte formation and protects against diet-induced obesity, whereas receptor haploinsufficiency compromises thermogenic responses. These findings underscore the importance of sensory feedback loops and adipose-derived neurotrophic signals in tuning the neural network that governs fat metabolism.

Neural Regulation of Adipose Tissue Metabolism publication trend

The graph below shows the total number of articles in neural regulation of adipose tissue metabolism across all publications each year (not limited to Nature Index journals).

Technical terms

Sympathetic nervous system: Branch of the autonomic nervous system whose noradrenergic fibres innervate adipose tissues to induce lipolysis and thermogenesis.

Somatosensory neurons: Peripheral afferent fibres that convey sensory and interoceptive information from adipose depots to the central nervous system.

Beiging: Process by which white adipocytes acquire features of brown fat, including uncoupling protein 1 expression and enhanced mitochondrial respiration.

Neurotrophic factors: Secreted proteins that support survival, growth and plasticity of neurons, modulating adipose innervation density.

Lipolysis: Enzymatic breakdown of triglycerides within adipocytes, resulting in the release of free fatty acids for energy use.

Thermogenesis: Heat production in brown and beige adipocytes mediated by mitochondrial uncoupling processes.

References

1. The Sympathetic‐Immune Milieu in Metabolic Health and Diseases: Insights from Pancreas, Liver, Intestine, and Adipose Tissues. Advanced Science (2023).
2. Gβγ-SNAP25 exocytotic brake removal enhances insulin action, promotes adipocyte browning, and protects against diet-induced obesity. Journal of Clinical Investigation (2023).
3. Whole-tissue 3D imaging reveals intra-adipose sympathetic plasticity regulated by NGF-TrkA signal in cold-induced beiging. Protein & Cell (2018).
4. The role of somatosensory innervation of adipose tissues. Nature (2022).
5. Adipose tissue-derived neurotrophic factor 3 regulates sympathetic innervation and thermogenesis in adipose tissue. Nature Communications (2021).