Energy balance

Deficiency in the histone demethylase JHDM2a causes adult-onset obesity, metabolic syndrome, and insulin resistance in mice through reduced energy expenditure and impaired fat oxidation.

This research highlights that obesity is not just about calories in vs. calories out, but also involves complex epigenetic regulation of how your body burns fat. In mice, a specific enzyme (JHDM2a) controls genes that determine energy expenditure. When this enzyme is missing, the body burns less fat and stores more, leading to obesity regardless of food intake. This suggests that metabolic health is deeply tied to gene expression regulation, not just behavior.