Macrophage migration inhibitory factor deficiency impairs atherosclerosis in low-density lipoprotein receptor-deficient mice.
Circulation
; 109(25): 3149-53, 2004 Jun 29.
Article
em En
| MEDLINE
| ID: mdl-15197138
ABSTRACT
BACKGROUND:
Macrophage migration inhibitory factor (MIF) is a proinflammatory cytokine expressed widely by vascular cells. However, scant in vivo evidence supports direct participation of MIF in atherogenesis. Therefore, we investigated whether deficiency of MIF modulates atherosclerotic lesion formation and composition in low-density lipoprotein receptor-deficient (LDLr-/-) mice. METHODS ANDRESULTS:
MIF-/-LDLr-/- and LDLr-/- mice were generated and consumed an atherogenic diet for 12 or 26 weeks. MIF-/-LDLr-/- mice had significantly reduced abdominal aorta lipid deposition and intimal thickening from aortic arch throughout the abdominal aorta compared with LDLr-/- mice. Marked retardation of atherosclerosis over time in MIF-deficient mice accompanied decreased lesion cell proliferation. At 26 weeks, 20% of MIF-deficient mice developed only early, fatty streak-like lesions, whereas >80% of LDLr-/- mice developed advanced lesions containing calcification and lipid cores. Analysis of smooth muscle cells from mouse aortae demonstrated that MIF deficiency reduced smooth muscle cell proliferation, cysteine protease expression, and elastinolytic and collagenolytic activities.CONCLUSIONS:
Deficiency of MIF reduces atherogenesis in LDLr-/- mice. These results provide novel insight into inflammatory pathways operating in atheromata and identify a new potential target for modulating atherogenesis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Arteriosclerose
/
Receptores de LDL
/
Fatores Inibidores da Migração de Macrófagos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article