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Sans A, Bonnafous S, Rousseau D, Patouraux S, Canivet CM, Leclere PS, Tran-Van-Nhieu J, Luci C, Bailly-Maitre B, Xu X, Lee AH, Minehira K, Anty R, Tran A, Iannelli A, Gual P. The Differential Expression of Cide Family Members is Associated with Nafld Progression from Steatosis to Steatohepatitis. Sci Rep 2019; 9:7501. [PMID: 31097771 PMCID: PMC6522528 DOI: 10.1038/s41598-019-43928-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 05/03/2019] [Indexed: 01/22/2023] Open
Abstract
Improved understanding of the molecular mechanisms responsible for the progression from a “non-pathogenic” steatotic state to Non-Alcoholic Steatohepatitis is an important clinical requirement. The cell death-inducing DFF45 like effector (CIDE) family members (A, B and FSP27) regulate hepatic lipid homeostasis by controlling lipid droplet growth and/or VLDL production. However, CIDE proteins, particularly FSP27, have a dual role in that they also regulate cell death. We here report that the hepatic expression of CIDEA and FSP27 (α/β) was similarly upregulated in a dietary mouse model of obesity-mediated hepatic steatosis. In contrast, CIDEA expression decreased, but FSP27-β expression strongly increased in a dietary mouse model of steatohepatitis. The inverse expression pattern of CIDEA and FSP27β was amplified with the increasing severity of the liver inflammation and injury. In obese patients, the hepatic CIDEC2 (human homologue of mouse FSP27β) expression strongly correlated with the NAFLD activity score and liver injury. The hepatic expression of CIDEA tended to increase with obesity, but decreased with NAFLD severity. In hepatic cell lines, the downregulation of FSP27β resulted in the fractionation of lipid droplets, whereas its overexpression decreased the expression of the anti-apoptotic BCL2 marker. This, in turn, sensitized cells to apoptosis in response to TNF α and saturated fatty acid. Considered together, our animal, human and in vitro studies indicate that differential expression of FSP27β/CIDEC2 and CIDEA is related to NAFLD progression and liver injury.
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Affiliation(s)
- Arnaud Sans
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Stéphanie Bonnafous
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | | | - Stéphanie Patouraux
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Clémence M Canivet
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | | | - Jeanne Tran-Van-Nhieu
- HU Henri Mondor, Department of Pathology, AP-HP - Université Paris Est Créteil, Créteil, France
| | - Carmelo Luci
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France
| | | | - Xu Xu
- Weill Cornell Medicine, Department of Medicine, Division of Gastroenterology and Hepatology, New York, USA
| | - Ann-Hwee Lee
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, USA
| | - Kaori Minehira
- University of Lausanne, Department of Physiology, Lausanne, Switzerland
| | - Rodolphe Anty
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Albert Tran
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Antonio Iannelli
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.,Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Philippe Gual
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France.
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Lotersztajn S, Teixeira-Clerc F, Julien B, Deveaux V, Ichigotani Y, Manin S, Tran-Van-Nhieu J, Karsak M, Zimmer A, Mallat A. CB2 receptors as new therapeutic targets for liver diseases. Br J Pharmacol 2007; 153:286-9. [PMID: 17952109 DOI: 10.1038/sj.bjp.0707511] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cannabinoid type-1 (CB1) and type-2 (CB2) receptors belong to the family of G protein-coupled receptors and mediate biological effects of phyto-derived and endogenous cannabinoids. Whereas functions of CB1 receptor have been extensively studied, the CB2 receptor has emerged over the last few years as a critical player in regulation of inflammation, pain, atherosclerosis and osteoporosis. Therefore, although still at a preclinical stage, the development of selective CB2 molecules has gained of interest as new targets in drug discovery. Recent data have unravelled a key role of CB2 receptors during chronic and acute liver injury, including fibrogenesis associated to chronic liver diseases, ischaemia-reperfusion-induced liver injury, and hepatic encephalopathy associated to acute liver failure. This review summarizes the latest advances on the recently identified role of CB2 receptors in the pathophysiology of liver diseases.
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Serriere-Lanneau V, Teixeira-Clerc F, Li L, Schippers M, de Wries W, Julien B, Tran-Van-Nhieu J, Manin S, Poelstra K, Chun J, Carpentier S, Levade T, Mallat A, Lotersztajn S. The sphingosine 1-phosphate receptor S1P2 triggers hepatic wound healing. FASEB J 2007; 21:2005-13. [PMID: 17341687 DOI: 10.1096/fj.06-6889com] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Sphingosine 1-phosphate (S1P) is a bioactive sphingolipid produced by sphingosine kinase (SphK1 and 2). We previously showed that S1P receptors (S1P1, S1P2, and S1P3) are expressed in hepatic myofibroblasts (hMF), a population of cells that triggers matrix remodeling during liver injury. Here we investigated the function of these receptors in the wound healing response to acute liver injury elicited by carbon tetrachloride, a process that associates hepatocyte proliferation and matrix remodeling. Acute liver injury was associated with the induction of S1P2, S1P3, SphK1, and SphK2 mRNAs and increased SphK activity, with no change in S1P1 expression. Necrosis, inflammation, and hepatocyte regeneration were similar in S1P2-/- and wild-type (WT) mice. However, compared with WT mice, S1P2-/- mice displayed reduced accumulation of hMF, as shown by lower induction of smooth muscle alpha-actin mRNA and lower induction of TIMP-1, TGF-beta1, and PDGF-BB mRNAs, overall reflecting reduced activation of remodeling in response to liver injury. The wound healing response was similar in S1P3-/- and WT mice. In vitro, S1P enhanced proliferation of cultured WT hMF, and PDGF-BB further enhanced the mitogenic effect of S1P. In keeping with these findings, PDGF-BB up-regulated S1P2 and SphK1 mRNAs, increased SphK activity, and S1P2 induced PDGF-BB mRNA. These effects were blunted in S1P2-/- cells, and S1P2-/- hMF exhibited reduced mitogenic and comitogenic responses to S1P. These results unravel a novel major role of S1P2 in the wound healing response to acute liver injury by a mechanism involving enhanced proliferation of hMF.
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Affiliation(s)
- Valérie Serriere-Lanneau
- INSERM U841, Institut Mondor de Recherche Biomédicale, Hôpital Henri Mondor, 94010 Créteil, France
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