Researchers discover how opsin 3, a light-sensitive brain protein, regulates food consumption in mice

Scientists discovered years ago that the hypothalamus -- which helps to manage body temperature, hunger, sex drive, sleep and more -- includes neurons that express the protein opsin 3 (OPN3). Far less clear, however, was what this light-sensing protein does so deep inside the brain. A study now suggests that OPN3 plays an important role in regulating food consumption.

Scientists discovered years ago that the hypothalamus -- which helps to manage body temperature, hunger, sex drive, sleep and more -- includes neurons that express the protein opsin 3 (OPN3). Far less clear, however, was what this light-sensing protein does so deep inside the brain. A study now suggests that OPN3 plays an important role in regulating food consumption.

Read more https://www.sciencedaily.com/releases/2025/02/250214225027.htm