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  • Title: Macrophage colony stimulating factor prevents the progression of atherosclerosis in Watanabe heritable hyperlipidemic rabbits.
    Author: Inoue I, Inaba T, Motoyoshi K, Harada K, Shimano H, Kawamura M, Gotoda T, Oka T, Shiomi M, Watanabe Y.
    Journal: Atherosclerosis; 1992 Apr; 93(3):245-54. PubMed ID: 1590829.
    Abstract:
    The early atherosclerotic lesion is characterized by the presence of macrophage-derived foam cells. Macrophage colony stimulating factor (M-CSF) specifically stimulates the functions of the monocyte-macrophages. To elucidate the effects of M-CSF in the atherogenic process in vivo, we administered human recombinant M-CSF into Watanabe heritable hyperlipidemic (WHHL) rabbits, an animal model for familial hypercholesterolemia. Three hundred micrograms of M-CSF were intravenously injected into WHHL rabbits aged 2.5 months, three times a week for 8.5 months. After the M-CSF treatment, we found very retarded progression of atherosclerosis. The accumulation of cholesterol ester was remarkably decreased in the aortae of M-CSF-treated animals (0.60 +/- 0.32 mg/g tissue), as compared to those of controls (4.32 +/- 0.61 mg/g tissue). Furthermore, the percentage of the surface area of the aorta with macroscopic plaque in animals treated with M-CSF was 14.3 +/- 6.2%, much less than that in controls receiving saline injection (38.8 +/- 8.0%). Thus, M-CSF definitely prevented the progression of atherosclerosis in WHHL rabbits by influencing macrophage functions.
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