Non-homeostatic body weight regulation through a brainstem-restricted receptor for GDF15.
Level 5 - mechanism / opinion, no new human data
Preclinical animal and laboratory mechanistic study.
PubMed 28953886 · doi:10.1038/nature24042
What was done
Researchers investigated the receptor and neural circuits mediating the metabolic effects of GDF15 using mouse models, including Gfral knockout mice exposed to stress and chemotherapy, and mapped downstream neuronal activation in the brainstem and connected brain regions.
What was found
The abstract reports no numerical values. Qualitatively, GDNF receptor alpha-like (GFRAL) was identified as the receptor for GDF15, localized exclusively in the area postrema and nucleus tractus solitarius of the mouse brainstem. Gfral knockout mice were hyperphagic under stress and resistant to chemotherapy-induced anorexia and body weight loss. GDF15 triggered activation of downstream neurons in the parabrachial nucleus and central amygdala.
Why it matters
This study establishes GFRAL as the receptor for GDF15, uncovering the molecular and neural pathway responsible for non-homeostatic appetite suppression and weight loss during tissue stress, injury, and chemotherapy.
Limits
Findings are limited to preclinical animal models and bench experiments with no direct human intervention data. Sample sizes and quantitative metrics were not reported in the abstract.
Cited by
- supports Receptors for GDF15 are localized exclusively in the brain, while GDF15 itself is synthesized by non-brain peripheral tissues and tumors.