PT - JOURNAL ARTICLE AU - Margules, DL AU - Moisset, B AU - Lewis, MJ AU - Shibuya, H AU - Pert, CB TI - beta-Endorphin is associated with overeating in genetically obese mice (ob/ob) and rats (fa/fa) AID - 10.1126/science.715455 DP - 1978 Dec 01 TA - Science PG - 988--991 VI - 202 IP - 4371 4099 - http://science.sciencemag.org/content/202/4371/988.short 4100 - http://science.sciencemag.org/content/202/4371/988.full SO - Science1978 Dec 01; 202 AB - Small doses of the opiate antagonist naloxone selectively abolished overeating in genetically obese mice (ob/ob) and rats (fa/fa). Elevated concentrations of the naturally occurring opiate beta-endorphin were found in the pituitaries of both obese species and in the blood plasma of the obese rats. Brain levels of beta-endorphin and Leu-enkephalin were unchanged. These data suggest that excess pituitary beta-endorphin may play a role in the development of the overeating and obesity syndrome.