Postprandial pancreatic secretion results from the interaction of neural and hormonal factors but their contribution to the net postprandial secretion is unknown. Recent description of highly specific and potent cholecystokinin (CCK) receptor antagonists allows the determination of the physiological role of CCK in the postprandial pancreatic secretion. In six dogs with chronic pancreatic fistul...

Early measurements of cholecystokinin (CCK) were based on the abilities of blood or blood extracts to stimulate gallbladder contraction or pancreatic exocrine secretion. These biological assays were performed in laboratory animals such as dogs, pigs or rodents. The usefulness of these assays was limited because methods were cumbersome and interpretation of results was complicated by confounding...

In 100 subjects the cholecystokinin test has been used in conjunction with the secretin test of gall bladder function. The response of the normal gall bladder to a standard dose of pancreozymin has been studied and the results in patients following cholecystectomy and in the presence of biliary tract disease have been recorded and contrasted with the results obtained by the secretin test and or...

We have previously reported that CCK-A receptor agonists and CCK-B receptor antagonists both enhance memory in an olfactory recognition test. Here, we report that the memory-enhancing effect of the CCK-B receptor antagonist L-365,260 (1 mg/kg i.p.), but not that of the CCK-A receptor agonist caerulein (0.03 mg/kg i.p.), was dramatically decreased following a bilateral transection of the perfora...

The subfornical organ (SFO) is an important sensory circumventricular organ implicated in the regulation of fluid homeostasis and energy balance. We investigated whether the SFO is activated by the hormone cholecystokinin (CCK). CCK₁ and CCK₂ receptors were identified in the SFO by RT-PCR. Dissociated SFO neurons that responded to CCK (40/77), were mostly depolarized (9.2 ± 0.9 mV, 30/77), but ...

Cholecystokinin (CCK), one of the most abundant neuropeptides in the brain, plays an important role in anxiogenesis through the activation of CCK receptor-2 (CCKR-2). Accumulating evidence, however, has suggested this role depends on endogenous CCKergic "tone," which is largely determined by the expression level of the CCKR-2. Using the tTA/tetO-inducible transgenic (tg) approach, we show here ...

Considerable interest has been aroused by the suggestion that the gut hormone cholecystokinin (CCK) is released during feeding and then acts as a satiety signal (Gibbs et al. 1973). Many studies, in species ranging from the mouse to man, have shown that peripheral administration of CCK, or its octapeptide, will reduce food intake. However, inhibition of feeding could be produced via a satiety s...