“…This finding is partially in accordance with an earlier study, in which chicken CCK1R is widely expressed in peripheral tissues (pancreas, small intestine, pituitary, and gallbladder; Ohkubo et al, 2007 ). Our findings also coincide with reports in mammals ( Kageyama et al, 2005 ; Konno et al, 2015 ), in which CCK2R is widely expressed in the peripheral tissues and is involved in the regulation of pancreatic enzyme secretion ( Suzuki et al, 2001 ), intestinal mobility ( Jiao et al, 2022 ), and satiety ( Weatherford et al, 1992 ; Dunn et al, 2013 ). Interestingly, our results showed that cCCK1R is expressed in the pituitary gland, which has not been reported in mammals thus far.…”