Entry Name Regulation of lipolysis in adipocytes
Description Lipolysis in adipocytes, the hydrolysis of triacylglycerol (TAG) to release fatty acids (FAs) and glycerol for use by other organs as energy substrates, is a unique function of white adipose tissue. Lipolysis is under tight hormonal control. During fasting, catecholamines, by binding to Gs-coupled-adrenergic receptors (-AR), activate adenylate cyclase (AC) to increase cAMP and activate protein kinase A (PKA). PKA phosphorylates target protein such as hormone-sensitive lipase (HSL) and perilipin 1 (PLIN). PLIN phosphorylation is a key event in the sequential activation of TAG hydrolysis involving adipose triglyceride lipase (ATGL), HSL, and monoglyceride lipase (MGL). During the fed state, insulin, through activation of phosphodiesterase-3B (PDE-3B), inhibits catecholamine-induced lipolysis via the degradation of cAMP.
Class Organismal Systems; Endocrine systemBRITE hierarchy
Pathway map ko04923 Regulation of lipolysis in adipocytes
Other DBs Orthology K00922 PIK3CA_B_D; phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha/beta/delta [EC:2.7.1.153 ]
K02649 PIK3R1_2_3; phosphoinositide-3-kinase regulatory subunit alpha/beta/delta
K04141 ADRB1; adrenergic receptor beta-1
K04142 ADRB2; adrenergic receptor beta-2
K04143 ADRB3; adrenergic receptor beta-3
K04204 NPY1R; neuropeptide Y receptor type 1
K04249 TSHR; thyrotropin receptor
K04260 PTGER3; prostaglandin E receptor 3
K04265 ADORA1; adenosine receptor A1
K04630 GNAI; guanine nucleotide-binding protein G(i) subunit alpha
K04632 GNAS; guanine nucleotide-binding protein G(s) subunit alpha
K05251 TSHB; thyrotropin subunit beta
K07187 IRS2; insulin receptor substrate 2
K08522 CGA; glycoprotein hormones alpha chain
K08753 FABP4, aP2; fatty acid-binding protein 4, adipocyte
K12323 ANPRA, NPR1; atrial natriuretic peptide receptor A [EC:4.6.1.2 ]
K12334 NPPA; natriuretic peptide A
K13296 PDE3B; cGMP-inhibited 3',5'-cyclic phosphodiesterase B [EC:3.1.4.17 ]
K13699 ABHD5, CGI-58; abhydrolase domain-containing protein 5 [EC:2.3.1.51 ]
K16172 IRS1; insulin receptor substrate 1
K16816 PNPLA2, ATGL; patatin-like phospholipase domain-containing protein 2 [EC:3.1.1.3 ]
K17445 IRS3; insulin receptor substrate 3
K17446 IRS4; insulin receptor substrate 4
K25878 CIDEC; cell death activator CIDE-C
Compound Reference Authors Ahmadian M, Wang Y, Sul HS
Title Lipolysis in adipocytes.
Journal Reference Authors Ahmadian M, Duncan RE, Sul HS
Title The skinny on fat: lipolysis and fatty acid utilization in adipocytes.
Journal Reference Authors Wang S, Soni KG, Semache M, Casavant S, Fortier M, Pan L, Mitchell GA
Title Lipolysis and the integrated physiology of lipid energy metabolism.
Journal Reference Authors Lafontan M
Title Historical perspectives in fat cell biology: the fat cell as a model for the investigation of hormonal and metabolic pathways.
Journal Reference Authors Fruhbeck G, Mendez-Gimenez L, Fernandez-Formoso JA, Fernandez S, Rodriguez A
Title Regulation of adipocyte lipolysis.
Journal Reference Authors Proenca AR, Sertie RA, Oliveira AC, Campana AB, Caminhotto RO, Chimin P, Lima FB
Title New concepts in white adipose tissue physiology.
Journal Reference Authors Duncan RE, Ahmadian M, Jaworski K, Sarkadi-Nagy E, Sul HS
Title Regulation of lipolysis in adipocytes.
Journal Reference Authors Lafontan M
Title Advances in adipose tissue metabolism.
Journal Reference Authors Jaworski K, Sarkadi-Nagy E, Duncan RE, Ahmadian M, Sul HS
Title Regulation of triglyceride metabolism. IV. Hormonal regulation of lipolysis in adipose tissue.
Journal Reference Authors Thompson D, Karpe F, Lafontan M, Frayn K
Title Physical activity and exercise in the regulation of human adipose tissue physiology.
Journal Reference Authors Lafontan M, Langin D
Title Lipolysis and lipid mobilization in human adipose tissue.
Journal Reference Authors Arner P, Langin D
Title Lipolysis in lipid turnover, cancer cachexia, and obesity-induced insulin resistance.
Journal Reference Authors Brasaemle DL
Title Thematic review series: adipocyte biology. The perilipin family of structural lipid droplet proteins: stabilization of lipid droplets and control of lipolysis.
Journal Reference Authors Lampidonis AD, Rogdakis E, Voutsinas GE, Stravopodis DJ
Title The resurgence of Hormone-Sensitive Lipase (HSL) in mammalian lipolysis.
Journal Reference Authors Bickel PE, Tansey JT, Welte MA
Title PAT proteins, an ancient family of lipid droplet proteins that regulate cellular lipid stores.
Journal Reference Authors Grahn THM, Kaur R, Yin J, Schweiger M, Sharma VM, Lee MJ, Ido Y, Smas CM, Zechner R, Lass A, Puri V
Title Fat-specific protein 27 (FSP27) interacts with adipose triglyceride lipase (ATGL) to regulate lipolysis and insulin sensitivity in human adipocytes.
Journal Related ko00590 Arachidonic acid metabolism
