» Articles » PMID: 24191036

Monounsaturated Fatty Acids Generated Via Stearoyl CoA Desaturase-1 Are Endogenous Inhibitors of Fatty Acid Amide Hydrolase

Overview
Specialty Science
Date 2013 Nov 6
PMID 24191036
Citations 35
Authors
Affiliations
Soon will be listed here.
Abstract

High-fat diet (HFD)-induced obesity and insulin resistance are associated with increased activity of the endocannabinoid/CB1 receptor (CB1R) system that promotes the hepatic expression of lipogenic genes, including stearoyl-CoA desaturase-1 (SCD1). Mice deficient in CB1R or SCD1 remain lean and insulin-sensitive on an HFD, suggesting a functional link between the two systems. The HFD-induced increase in the hepatic levels of the endocannabinoid anandamide [i.e., arachidonoylethanolamide (AEA)] has been attributed to reduced activity of the AEA-degrading enzyme fatty acid amide hydrolase (FAAH). Here we show that HFD-induced increased hepatic AEA levels and decreased FAAH activity are absent in SCD1(-/-) mice, and the monounsaturated fatty acid (MUFA) products of SCD1, palmitoleic and oleic acid, inhibit FAAH activity in vitro at low micromolar concentrations. HFD markedly increases hepatic SCD1 activity in WT mice as well as in CB1R(-/-) mice with transgenic reexpression of CB1R in hepatocytes, but not in global CB1R(-/-) mice. Treatment of HFD-fed mice with the SCD1 inhibitor A939572 prevents the diet-induced reduction of hepatic FAAH activity, normalizes hepatic AEA levels, and improves insulin sensitivity. SCD1(-/-) mice on an HFD remain insulin-sensitive, but develop glucose intolerance and insulin resistance in response to chronic treatment with the FAAH inhibitor URB597. An HFD rich in MUFA or feeding mice pure oleic acid fail to inhibit hepatic FAAH activity. We conclude that MUFAs generated via SCD1 activity, but not diet-derived MUFAs, function as endogenous FAAH inhibitors mediating the HFD-induced increase in hepatic AEA, which then activates hepatic CB1R to induce insulin resistance.

Citing Articles

Cannabigerol-A useful agent restoring the muscular phospholipids milieu in obese and insulin-resistant Wistar rats?.

Bielawiec P, Dziemitko S, Konstantynowicz-Nowicka K, Sztolsztener K, Chabowski A, Harasim-Symbor E Front Mol Biosci. 2024; 11:1401558.

PMID: 38919749 PMC: 11196617. DOI: 10.3389/fmolb.2024.1401558.


4,4-Dimethylsterols Reduces Fat Accumulation via Inhibiting Fatty Acid Amide Hydrolase In Vitro and In Vivo.

Zhang T, Xie L, Guo Y, Wang Z, Guo X, Liu R Research (Wash D C). 2024; 7:0377.

PMID: 38812531 PMC: 11134202. DOI: 10.34133/research.0377.


Inactivation of mitochondrial MUL1 E3 ubiquitin ligase deregulates mitophagy and prevents diet-induced obesity in mice.

Cilenti L, Di Gregorio J, Mahar R, Liu F, Ambivero C, Periasamy M Front Mol Biosci. 2024; 11:1397565.

PMID: 38725872 PMC: 11079312. DOI: 10.3389/fmolb.2024.1397565.


CDK6 inhibits de novo lipogenesis in white adipose tissues but not in the liver.

Hu A, Li W, Dinh C, Zhang Y, Hu J, Daniele S Nat Commun. 2024; 15(1):1091.

PMID: 38316780 PMC: 10844593. DOI: 10.1038/s41467-024-45294-z.


Association between the FAAH C385A variant (rs324420) and obesity-related traits: a systematic review.

Lopez-Cortes O, Trujillo-Sanchez F, Sierra-Ruelas E, Martinez-Lopez E, Di Marzo V, Vizmanos B Int J Obes (Lond). 2023; 48(2):188-201.

PMID: 38114812 DOI: 10.1038/s41366-023-01428-9.


References
1.
Zimmer A, Zimmer A, Hohmann A, Herkenham M, Bonner T . Increased mortality, hypoactivity, and hypoalgesia in cannabinoid CB1 receptor knockout mice. Proc Natl Acad Sci U S A. 1999; 96(10):5780-5. PMC: 21937. DOI: 10.1073/pnas.96.10.5780. View

2.
Mukhopadhyay B, Cinar R, Yin S, Liu J, Tam J, Godlewski G . Hyperactivation of anandamide synthesis and regulation of cell-cycle progression via cannabinoid type 1 (CB1) receptors in the regenerating liver. Proc Natl Acad Sci U S A. 2011; 108(15):6323-8. PMC: 3076854. DOI: 10.1073/pnas.1017689108. View

3.
Sampath H, Miyazaki M, Dobrzyn A, Ntambi J . Stearoyl-CoA desaturase-1 mediates the pro-lipogenic effects of dietary saturated fat. J Biol Chem. 2006; 282(4):2483-93. DOI: 10.1074/jbc.M610158200. View

4.
Kim Y, Hernandez M, Balla T . Inositol lipid regulation of lipid transfer in specialized membrane domains. Trends Cell Biol. 2013; 23(6):270-8. PMC: 3665726. DOI: 10.1016/j.tcb.2013.01.009. View

5.
Hirvonen J, Goodwin R, Li C, Terry G, Zoghbi S, Morse C . Reversible and regionally selective downregulation of brain cannabinoid CB1 receptors in chronic daily cannabis smokers. Mol Psychiatry. 2011; 17(6):642-9. PMC: 3223558. DOI: 10.1038/mp.2011.82. View