Dynorphin-(1-17) produces a highly specific increase in food ingestion. Similar enhancement of food ingestion is found with dynorphin fragments (1-10), (1-11), (1-13) and (3-13) but not with (1-8) and (1-9). Dynorphin B (rimorphin) also enhances food intake. The highly specific kappa agonist U-50,488 also enhances food intake as do a number of other kappa-opiate receptor agonists. These studies provided further support for the role of a highly specific dynorphin-kappa opioid receptor in the modulation of feeding.
Bibliographical noteFunding Information:
We thank Martha Grace and Julie Kneip for excellent technical assistance. JoAnn Tallman provided secretarial assistance. This work was supported in part by the Veterans Administration.
- Kappa receptor