Lipase, Hormone Sensitive (LIPE)
other names：HSL; LHS; Hormone Sensitive Lipase
Hormone sensitive lipase(HSL;LIPE) is an intracellular neutral lipase that is capable of hydrolyzing a variety of esters. The enzyme has a long and a short form. The long form is expressed in steroidogenic tissues such as testis, where it converts cholesteryl esters to free cholesterol for steroid hormone production. The short form is expressed in adipose tissue, among others, where it hydrolyzes stored triglycerides to free fatty acids.
LIPE is activated when the body needs to mobilize energy stores, and so responds positively to catecholamines, ACTH, and negatively to insulin. Previously, glucagon was thought to activate LIPE, however the removal of insulin's inhibitory effects ("cutting the brakes") is the source of activation. The lipolytic effect of glucagon in adipose tissue is minimal in humans.
Hormone sensitive lipase(HSL;LIPE) is an intracellular neutral lipase that is capable of hydrolyzing a variety of esters. The enzyme has a long and a short form. The long form is expressed in steroidogenic tissues such as testis, where it converts cholesteryl esters to free cholesterol for steroid hormone production. The short form is expressed in adipose tissue, among others, where it hydrolyzes stored triglycerides to free fatty acids.
LIPE is activated when the body needs to mobilize energy stores, and so responds positively to catecholamines, ACTH, and negatively to insulin. Previously, glucagon was thought to activate LIPE, however the removal of insulin's inhibitory effects ("cutting the brakes") is the source of activation. The lipolytic effect of glucagon in adipose tissue is minimal in humans.
