EMOJIPEDIA/THE SCIENTIST
A gene variant linked to weight gain may affect dopamine signaling in the brain, making it difficult for some people to learn from negative consequences, according to a study published last week (September 9) in The Journal of Neuroscience. Study participants with two specific gene variants selected the incorrect response in an image-based task more often than did those without the alleles, and functional magnetic resonance imaging (fMRI) brain scans revealed that participants with the variants had some reduced dopamine signaling-related connections.
Linking weight gain to any one of the 24,000 protein-coding genes in the human body is a challenge. ...
