缩胆囊素

· extracellular space · axon · dendrite · axon initial segment · terminal bouton · axon hillock· neuron migration · release of cytochrome c from mitochondria · activation of cysteine-type endopeptidase activity involved in apoptotic process · signal transduction · protein kinase C-activating G-protein coupled receptor signaling pathway · axonogenesis · positive regulation of cell proliferation · negative regulation of appetite · positive regulation of protein oligomerization · eating behavior · positive regulation of apoptotic process · positive regulation of peptidyl-tyrosine phosphorylation · positive regulation of mitochondrial depolarization胆囊收缩素（英语：cholecystokinin，简称CCK或CCK-PZ；词源来自于希腊语的chole，胆汁之意；cysto，囊状之意；kinin，移动之意；组合起来的意义为“移动胆汁之囊”）是一种消化系统当中的肽类激素，可以促进脂肪与蛋白质的消化。胆囊收缩素在此之前名为促胰酶素（pancreozymin），是由小肠的黏膜上皮细胞当中的I细胞所合成，并由十二指肠分泌；这会导致从胰脏与胆囊，各自释放消化酶与胆汁。胆囊收缩素也是一种食欲抑制剂。最近的证据暗示，胆囊收缩素在促进鸦片类药物的药物容许量，如吗啡和海洛因，扮演着重要角色，并且在经历鸦片类药物停药后的疼痛过敏经历有着部分的关联性。