The MIC-1/GDF15-GFRAL Pathway in Energy Homeostasis: Implications for Obesity, Cachexia, and Other Associated Diseases.
Level 5 - mechanism / opinion, no new human data
Narrative review describing biological mechanisms without new primary human data
PubMed 30184485 · doi:10.1016/j.cmet.2018.07.018
What was done
Narrative review describing the biological mechanisms of the stress response cytokine MIC-1/GDF15, its interaction with the receptor GFRAL and the Ret tyrosine kinase, and its role in energy homeostasis and disease.
What was found
The abstract reports no numerical data or quantitative outcomes. It describes that MIC-1/GDF15 expression and serum levels increase during cellular stress, cancer, and cardiovascular disease, and that elevated levels act on hindbrain neurons to induce anorexia and cachexia.
Why it matters
Elucidating the GDF15-GFRAL pathway identifies a central regulatory mechanism of appetite that may serve as a drug target for obesity and disease-associated wasting syndromes.
Limits
The abstract contains no primary experimental or clinical data, no sample size, and no quantitative estimates of effect size. It presents a general mechanistic overview rather than a systematic synthesis.
Cited by
- supports Receptors for GDF15 are localized exclusively in the brain, while GDF15 itself is synthesized by non-brain peripheral tissues and tumors.