New Study Identifies Fat-Storing Gene That May Increase Anorexia Nervosa Risk

Anorexia nervosa has traditionally been studied primarily through psychological, behavioral and brain-based mechanisms. New research is adding another dimension by investigating how the body's ability to store and use energy may influence susceptibility to the eating disorder.

Researchers identified rare potentially damaging variants in the PLIN4 gene, which is primarily active in fat and muscle tissue. Among a specialized group of 154 patients with anorexia, approximately 11% carried rare variants predicted to damage the gene, compared with around 3% in a healthy reference population.

PLIN4 is involved in the regulation of fat storage, raising the possibility that altered metabolism could contribute to anorexia in some individuals.

The researchers emphasize that this does not mean that PLIN4 causes anorexia or that genetic testing can currently predict who will develop the disorder. The study involved a specialized patient group, and the findings must be replicated in larger independent populations.

Nevertheless, the research is important because it supports a broader understanding of anorexia as a serious biological and psychiatric illness rather than simply a behavioral choice.