Abstract
Evidence that CCK participates in the control of meal size is compelling, but the avenues by which CCK may affect daily food intake and body weight regulation are still uncertain. Although participation of brain CCK in control of food intake is acknowledged, our focus here is on participation of peripheral CCK in the control of food intake. Therefore, in this article we (1) review evidence for CCK’s participation in control of meal size, (2) document involvement of CCK-A receptors located on vagal sensory neurons in control of food intake by exogenous and endogenous CCK, (3) point out apparent discrepancies in the experimental record, which auger for non-endocrine sources of CCK and non-vagal sites of CCK action, and (4) summarize recent observations, suggesting mechanisms by which CCK could participate in the control of daily food intake and body weight regulation.
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