Neural innervation of white adipose tissue and the control of lipolysis.
Level 5 - mechanism / opinion, no new human data
Narrative review of animal neuroanatomy and mechanistic physiology
PubMed 24736043 · doi:10.1016/j.yfrne.2014.04.001
What was done
This narrative review summarizes evidence regarding the neural innervation of white adipose tissue (WAT) and its role in controlling lipolysis. It synthesizes findings from non-human animal studies utilizing electrophysiology, neurochemical norepinephrine turnover measurements, and transsynaptic viral tract tracing to map sympathetic and sensory circuits regulating fat depots.
What was found
The abstract reports no numerical data or effect sizes. Key descriptive findings include: sympathetic nervous system (SNS) activation and norepinephrine release via beta-adrenoceptors are necessary for WAT lipolysis via hormone-sensitive lipase and perilipin A phosphorylation; evidence does not support WAT parasympathetic innervation; SNS drive is depot-specific; insulin and adenosine strongly inhibit SNS-mediated lipolysis, whereas leptin-triggered SNS-mediated lipolysis is weakly supported; SNS drive inhibits adipocyte proliferation while decreased drive stimulates it; and WAT sensory nerves are of spinal origin and form central SNS-sensory feedback loops.
Why it matters
It outlines the neuroanatomical and physiological framework of neural-adipose communication, clarifying that WAT lipolysis is regulated by depot-specific sympathetic circuits rather than parasympathetic or uniform systemic inputs.
Limits
The review relies primarily on non-human animal neuroanatomical and electrophysiological models. Quantitative data, sample sizes, and study selection methodology are entirely absent from the abstract. Findings cannot be directly assumed to map identically to human adipose physiology without direct clinical verification.
Cited by
- supports Norepinephrine signals adipose tissue to break down triglycerides and release fatty acids into the bloodstream.