» Articles » PMID: 21164481

CRTC3 Links Catecholamine Signalling to Energy Balance

Abstract

The adipose-derived hormone leptin maintains energy balance in part through central nervous system-mediated increases in sympathetic outflow that enhance fat burning. Triggering of β-adrenergic receptors in adipocytes stimulates energy expenditure by cyclic AMP (cAMP)-dependent increases in lipolysis and fatty-acid oxidation. Although the mechanism is unclear, catecholamine signalling is thought to be disrupted in obesity, leading to the development of insulin resistance. Here we show that the cAMP response element binding (CREB) coactivator Crtc3 promotes obesity by attenuating β-adrenergic receptor signalling in adipose tissue. Crtc3 was activated in response to catecholamine signals, when it reduced adenyl cyclase activity by upregulating the expression of Rgs2, a GTPase-activating protein that also inhibits adenyl cyclase activity. As a common human CRTC3 variant with increased transcriptional activity is associated with adiposity in two distinct Mexican-American cohorts, these results suggest that adipocyte CRTC3 may play a role in the development of obesity in humans.

Citing Articles

CMS121: a novel approach to mitigate aging-related obesity and metabolic dysfunction.

Dafre A, Zahid S, Jorge Probst J, Currais A, Yu J, Schubert D Aging (Albany NY). 2024; 16(6):4980-4999.

PMID: 38517358 PMC: 11006478. DOI: 10.18632/aging.205673.


Amphiregulin normalizes altered circuit connectivity for social dominance of the CRTC3 knockout mouse.

Park J, Heo H, Kim M, Lee S, Park S, Kim K Mol Psychiatry. 2023; 28(11):4655-4665.

PMID: 37730843 PMC: 10914624. DOI: 10.1038/s41380-023-02258-x.


In vitro CRISPR screening uncovers CRTC3 as a regulator of IFN-γ-induced ferroptosis of hepatocellular carcinoma.

Li L, Xing T, Chen Y, Xu W, Fan B, Ju G Cell Death Discov. 2023; 9(1):331.

PMID: 37666810 PMC: 10477178. DOI: 10.1038/s41420-023-01630-8.


Impaired BCAA catabolism in adipose tissues promotes age-associated metabolic derangement.

Han H, Ahn E, Park E, Huh T, Choi S, Kwon Y Nat Aging. 2023; 3(8):982-1000.

PMID: 37488415 DOI: 10.1038/s43587-023-00460-8.


Biological functions of CRTC2 and its role in metabolism-related diseases.

Zheng H, Wang Y, Zhou K, Xie H, Ren Z, Liu H J Cell Commun Signal. 2023; 17(3):495-506.

PMID: 36856929 PMC: 10409973. DOI: 10.1007/s12079-023-00730-5.


References
1.
Ford E, Zhao G, Li C, Pearson W, Mokdad A . Trends in obesity and abdominal obesity among hypertensive and nonhypertensive adults in the United States. Am J Hypertens. 2008; 21(10):1124-8. DOI: 10.1038/ajh.2008.246. View

2.
Altarejos J, Goebel N, Conkright M, Inoue H, Xie J, Arias C . The Creb1 coactivator Crtc1 is required for energy balance and fertility. Nat Med. 2008; 14(10):1112-7. PMC: 2667698. DOI: 10.1038/nm.1866. View

3.
Rohlfs E, Daniel K, Premont R, Kozak L, Collins S . Regulation of the uncoupling protein gene (Ucp) by beta 1, beta 2, and beta 3-adrenergic receptor subtypes in immortalized brown adipose cell lines. J Biol Chem. 1995; 270(18):10723-32. DOI: 10.1074/jbc.270.18.10723. View

4.
van Baak M . The peripheral sympathetic nervous system in human obesity. Obes Rev. 2002; 2(1):3-14. DOI: 10.1046/j.1467-789x.2001.00010.x. View

5.
Sinnarajah S, Dessauer C, Srikumar D, Chen J, Yuen J, Yilma S . RGS2 regulates signal transduction in olfactory neurons by attenuating activation of adenylyl cyclase III. Nature. 2001; 409(6823):1051-5. DOI: 10.1038/35059104. View