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Peixoto E, Atorrasagasti C, Aquino JB, Militello R, Bayo J, Fiore E, Piccioni F, Salvatierra E, Alaniz L, García MG, Bataller R, Corrales F, Gidekel M, Podhajcer O, Colombo MI, Mazzolini G. SPARC (secreted protein acidic and rich in cysteine) knockdown protects mice from acute liver injury by reducing vascular endothelial cell damage. Gene Ther 2014; 22:9-19. [PMID: 25410742 DOI: 10.1038/gt.2014.102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 09/19/2014] [Accepted: 09/24/2014] [Indexed: 12/24/2022]
Abstract
Secreted protein, acidic and rich in cysteine (SPARC) is involved in many biological process including liver fibrogenesis, but its role in acute liver damage is unknown. To examine the role of SPARC in acute liver injury, we used SPARC knock-out (SPARC(-/-)) mice. Two models of acute liver damage were used: concanavalin A (Con A) and the agonistic anti-CD95 antibody Jo2. SPARC expression levels were analyzed in liver samples from patients with acute-on-chronic alcoholic hepatitis (AH). SPARC expression is increased on acute-on-chronic AH patients. Knockdown of SPARC decreased hepatic damage in the two models of liver injury. SPARC(-/-) mice showed a marked reduction in Con A-induced necroinflammation. Infiltration by CD4+ T cells, expression of tumor necrosis factor-α and interleukin-6 and apoptosis were attenuated in SPARC(-/-) mice. Sinusoidal endothelial cell monolayer was preserved and was less activated in Con A-treated SPARC(-/-) mice. SPARC knockdown reduced Con A-induced autophagy of cultured human microvascular endothelial cells (HMEC-1). Hepatic transcriptome analysis revealed several gene networks that may have a role in the attenuated liver damaged found in Con A-treated SPARC(-/-) mice. SPARC has a significant role in the development of Con A-induced severe liver injury. These results suggest that SPARC could represent a therapeutic target in acute liver injury.
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Affiliation(s)
- E Peixoto
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - C Atorrasagasti
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - J B Aquino
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - R Militello
- Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - J Bayo
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - E Fiore
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - F Piccioni
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - E Salvatierra
- Molecular and Cellular Therapy Laboratory, Fundación Instituto Leloir, Buenos Aires, Argentina
| | - L Alaniz
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - M G García
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - R Bataller
- 1] University of North Carolina at Chapel Hill, Chapel Hill, NC, USA [2] Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - F Corrales
- CIMA, Universidad de Navarra, Pamplona, España
| | - M Gidekel
- 1] Universidad de la Frontera, Temuco, Chile. [2] Universidad Autónoma de Chile, Santiago, Chile
| | - O Podhajcer
- Molecular and Cellular Therapy Laboratory, Fundación Instituto Leloir, Buenos Aires, Argentina
| | - M I Colombo
- 1] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina [2] Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - G Mazzolini
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
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Cannizzo B, Quesada I, Militello R, Amaya C, Miatello R, Cruzado M, Castro C. Tempol attenuates atherosclerosis associated with metabolic syndrome via decreased vascular inflammation and NADPH-2 oxidase expression. Free Radic Res 2014; 48:526-33. [PMID: 24490696 DOI: 10.3109/10715762.2014.889295] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Oxidative stress is an important factor in the generation of vascular injury in atherosclerosis. Chronic administration of fructose in rodents is able to facilitate oxidative damage. In the present study we evaluated the role of Tempol, a superoxide dismutase mimetic, on the effect of high fructose intake in apolipoprotein E-deficient (ApoE-KO) mice. Rodents were fed with fructose overload (FF, 10% w/v) for 8 weeks and treated with Tempol 1 mg/kg/day the latest 4 weeks. Tempol revert the pro-oxidant effects caused by FF, diminished lipid peroxidation and impaired vascular NADPH oxidase system through the downregulation of p47phox expression in the vascular wall. Tempol inhibited the expression of vascular adhesion molecule 1 (VCAM-1) in aorta and reduced the development of atheroma plaques. Our results indicate that tempol attenuates oxidative stress by interfering with the correct assembly of Nox2 oxidase complex in the vascular wall and is able to reduce atherosclerosis. Thus tempol represents a potential therapeutic target for preventing risk factors associated with metabolic syndrome.
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Affiliation(s)
- B Cannizzo
- Vascular Biology Lab, Institute of Medicine and Experimental Biology of Cuyo (IMBECU) CONICET, School of Medical Sciences, National University of Cuyo , Mendoza , Argentina
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