EXPERIMENTAL STUDIES
HMG-CoA reductase inhibition by atorvastatin reduces neointimal inflammation in a rabbit model of atherosclerosis
Carmen Bustos, PhDa,
Miguel A. Hernández-Presa, PhDa,
M.ónica Ortego, BSa,
José Tuñón, MDa,
Luis Ortega, MD*,
Fernando Pérez, PhD ,
Cristina Díaz, MD ,
Gonzalo Hernández, MD and
Jesús Egido, MDa
a Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
* Hospital Clínico, Madrid, Spain
Hospital Gómez Ulla, Universidad Complutense, Madrid, Spain
Parke Davis Spain, Barcelona, Spain
Manuscript received January 6, 1998;
revised manuscript received July 21, 1998,
accepted August 26, 1998.
Address for correspondence: Dr. Jesús Egido, Research Laboratory, Fundación Jiménez Díaz, Avda. Reyes Católicos 2. 28040 Madrid evasc{at}uni.fjd.es
Objectives. To study the effect of the 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA)-reductase inhibitor atorvastatin on the potential mechanisms involved in the recruitment of monocytic cells into the vessel wall.
Background. Inhibitors of HMG-CoA-reductase reduce cardiovascular mortality though the mechanisms yet elucidated. Most ischemic events are secondary to disruption of atherosclerotic plaques highly infiltrated by macrophages.
Methods. Atherosclerosis was induced in the femoral arteries of rabbits by endothelial damage and atherogenic diet for 4 weeks. Then, animals were switched to standard chow and randomized to receive either no treatment or atorvastatin (5 mg/kg/d) and killed after 4 weeks.
Results. Atorvastatin induced a significant reduction in serum lipids and in lesion size. Arterial macrophage infiltration was abolished by the treatment, and monocyte chemoattractant protein-1 (MCP-1) was significantly diminished in the neointima and in the media. Nuclear factor kappa-B (NF- B) was activated in the 60% of the lesions, both in macrophages and vascular smooth muscle cells (VSMC), of the untreated group while only in 30% of the atorvastatin group. NF- B activity was also lower in the uninjured aorta and liver of treated compared with untreated rabbits. In cultured VSMC, MCP-1 expression and NF- B activity induced by tumor necrosis factor alpha were downregulated by atorvastatin.
Conclusions. In a rabbit atherosclerosis model, atorvastatin diminishes the neointimal inflammation, and this could contribute to the stabilization of the atherosclerotic plaque. This may be an additional explanation for the reduction of acute ischemic events in patients treated with statins.
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Abbreviations and Acronyms
| | AP-1 | = activated protein-1 | | G3PDH | = glyceraldehyde 3-phosphate dehydrogenase | | HMG-CoA | = 3-hydroxy-3-methyl-glutaryl-coenzyme A | | MCP-1 | = monocyte chemoattractant protein-1 | NF- B | = Nuclear factor kappa-B | TNF | = tumor necrosis factor alpha | | VSMC | = vascular smooth muscle cells |
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G. G. Schwartz, A. G. Olsson, M. D. Ezekowitz, P. Ganz, M. F. Oliver, D. Waters, A. Zeiher, B. R. Chaitman, S. Leslie, T. Stern, et al.
Effects of Atorvastatin on Early Recurrent Ischemic Events in Acute Coronary Syndromes: The MIRACL Study: A Randomized Controlled Trial
JAMA,
April 4, 2001;
285(13):
1711 - 1718.
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C. Stefanadis, K. Toutouzas, E. Tsiamis, C. Stratos, M. Vavuranakis, I. Kallikazaros, D. Panagiotakos, and P. Toutouzas
Increased local temperature in human coronary atherosclerotic plaques: an independent predictor of clinical outcome in patients undergoing a percutaneous coronary intervention
J. Am. Coll. Cardiol.,
April 1, 2001;
37(5):
1277 - 1283.
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S. Amin-Hanjani, N. E. Stagliano, M. Yamada, P. L. Huang, J. K. Liao, M. A. Moskowitz, C. Y. Hsu, and A. Nassief
Mevastatin, an HMG-CoA Reductase Inhibitor, Reduces Stroke Damage and Upregulates Endothelial Nitric Oxide Synthase in Mice Editorial Comment
Stroke,
April 1, 2001;
32(4):
980 - 986.
[Abstract]
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S. Wassmann, U. Laufs, A. T. Bäumer, K. Müller, C. Konkol, H. Sauer, M. Böhm, and G. Nickenig
Inhibition of Geranylgeranylation Reduces Angiotensin II-Mediated Free Radical Production in Vascular Smooth Muscle Cells: Involvement of Angiotensin AT1 Receptor Expression and Rac1 GTPase
Mol. Pharmacol.,
March 1, 2001;
59(3):
646 - 654.
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M. Crisby, G. Nordin-Fredriksson, P. K. Shah, J. Yano, J. Zhu, and J. Nilsson
Pravastatin Treatment Increases Collagen Content and Decreases Lipid Content, Inflammation, Metalloproteinases, and Cell Death in Human Carotid Plaques : Implications for Plaque Stabilization
Circulation,
February 20, 2001;
103(7):
926 - 933.
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W. Palinsk
New Evidence for Beneficial Effects of Statins Unrelated to Lipid Lowering
Arterioscler Thromb Vasc Biol,
January 1, 2001;
21(1):
3 - 5.
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R. Rauramaa, S. B. Vaisanen, L.-A. Luong, A. Schmidt-Trucksass, I. M. Penttila, C. Bouchard, J. Toyry, and S. E. Humphries
Stromelysin-1 and Interleukin-6 Gene Promoter Polymorphisms Are Determinants of Asymptomatic Carotid Artery Atherosclerosis
Arterioscler Thromb Vasc Biol,
December 1, 2000;
20(12):
2657 - 2662.
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H. Ando, T. Takamura, T. Ota, Y. Nagai, and K.-i. Kobayashi
Cerivastatin Improves Survival of Mice with Lipopolysaccharide-Induced Sepsis
J. Pharmacol. Exp. Ther.,
September 1, 2000;
294(3):
1043 - 1046.
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K. K. Koh
Effects of statins on vascular wall: vasomotor function, inflammation, and plaque stability
Cardiovasc Res,
September 1, 2000;
47(4):
648 - 657.
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L. M. Blanco-Colio, M. Valderrama, L. A. Alvarez-Sala, C. Bustos, M. Ortego, M. A. Hernandez-Presa, P. Cancelas, J. Gomez-Gerique, J. Millan, and J. Egido
Red Wine Intake Prevents Nuclear Factor-{kappa}B Activation in Peripheral Blood Mononuclear Cells of Healthy Volunteers During Postprandial Lipemia
Circulation,
August 29, 2000;
102(9):
1020 - 1026.
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M. Vasa, S. Fichtlscherer, K. Adler, A. Aicher, H. Martin, A. M. Zeiher, and S. Dimmeler
Increase in Circulating Endothelial Progenitor Cells by Statin Therapy in Patients With Stable Coronary Artery Disease
Circulation,
June 19, 2001;
103(24):
2885 - 2890.
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R. Baetta, M. Camera, C. Comparato, C. Altana, M. D. Ezekowitz, and E. Tremoli
Fluvastatin Reduces Tissue Factor Expression and Macrophage Accumulation in Carotid Lesions of Cholesterol-Fed Rabbits in the Absence of Lipid Lowering
Arterioscler Thromb Vasc Biol,
April 1, 2002;
22(4):
692 - 698.
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C. Urbich, E. Dernbach, A. M. Zeiher, and S. Dimmeler
Double-Edged Role of Statins in Angiogenesis Signaling
Circ. Res.,
April 5, 2002;
90(6):
737 - 744.
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