This is the same mechanism that makes people feel full after small meals, and it is partly why some people report still feeling hungry on tirzepatide at lower doses where gastric emptying is less affected
Lung Cancer (2019) 130:15961
Front Oncol 12:887257 Chung AW, Anand K, Anselme AC, Chan AA, Gupta N, Venta LA, Schwartz MR, Qian W, Xu Y, Zhang L, Kuhn J, Patel T, Rodriguez AA, Belcheva A, Darcourt J, Ensor J, Bernicker E, Pan PY, Chen SH, Lee DJ, Niravath PA, Chang JC (2021) A phase 1/2 clinical trial of the nitric oxide synthase inhibitor l-nmma and taxane for treating chemoresistant triple-negative breast cancer
The highest expression in AT has been demonstrated for PDE3 and PDE4 and, specifically in BAT, PDE4 has been shown to primarily control adrenergic stimulation of lipolysis, while PDE3 predominantly regulates the induction of Ucp1 expression 39