Sensory-neuron-derived CGRPα controls white adipocyte differentiation and tissue plasticity

Area of Science:

• Neuroendocrinology
• Adipose tissue biology
• Metabolic regulation

Background:

• Brain-adipose tissue communication is vital for metabolic homeostasis.
• The peripheral nervous system, including sympathetic and sensory nerves, plays a key role.
• Sensory nerves release neuropeptides that can influence local tissue function.

Purpose of the Study:

• To investigate the role of sensory neuron-derived alpha-calcitonin gene-related peptide (CGRPα) in regulating adipose tissue differentiation and metabolism.
• To explore the therapeutic potential of targeting the CGRPα pathway for metabolic disorders.

Main Methods:

• In vitro studies using preadipocytes to assess CGRPα's effect on differentiation.
• In vivo studies in mice involving cold exposure and CGRPα modulation.
• Analysis of human data from patients treated with CGRPα/CGRP receptor (CGRPR) antagonists for migraine.

Main Results:

• CGRPα significantly inhibits white preadipocyte differentiation in a cell-autonomous manner, but not brown preadipocytes.
• In vivo, CGRPα signaling shifts subcutaneous adipose tissue composition towards larger adipocytes during cold exposure.
• Human patients on anti-CGRPα/CGRPR migraine medications exhibit reduced body weight and glycemia compared to controls.
• CGRPR antagonist treatment in mice exposed to cold leads to decreased body weight.

Conclusions:

• Sensory neuron-derived CGRPα acts as a key regulator of white adipose tissue plasticity.
• Targeting the CGRPα pathway presents a potential therapeutic strategy for managing obesity and metabolic dysfunction.
• This study elucidates a novel neuron-adipocyte communication axis influencing metabolic health.