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Volume 2, Issue 2, Pages 275-281 (August 1998) Absence of Monocyte Chemoattractant Protein-1 Reduces Atherosclerosis in Low Density Lipoprotein Receptor–Deficient Mice  Long Gu, Yoshikatsu Okada, Steven K. Clinton, Craig Gerard, Galina K. Sukhova, Peter Libby, Barrett J. Rollins  Molecular Cell  Volume 2, Issue 2, Pages 275-281 (August 1998) DOI: 10.1016/S1097-2765(00)80139-2

Figure 1 FPLC Fractionation of Plasma Lipids from LDL-R−/−/MCP-1+/+ and LDL-R−/−/MCP-1−/− Mice Mice were fed a 1.25% cholesterol, cholate-free diet for 12 weeks and then fasted overnight. Blood was obtained from four LDL-R−/−/MCP-1+/+ and two LDL-R−/−/MCP-1−/− mice in EDTA-coated tubes, and equivalent amounts of plasma from individuals of each genotype were combined to yield 0.2 ml. Plasma was fractionated by FPLC through two Superose-6 columns in series as described in the Experimental Procedures, and cholesterol concentrations in each 0.5 ml fraction were determined. This procedure was performed twice on two independent groups of mice and the mean cholesterol amounts in each fraction are shown. Solid lines indicate LDL-R−/−/MCP-1+/+ mice; dotted lines indicate LDL-R−/−/MCP-1−/− mice. Molecular Cell 1998 2, 275-281DOI: (10.1016/S1097-2765(00)80139-2)

Figure 2 Lipid Deposition in Aortas of LDL-R−/−/MCP-1+/+ and LDL-R−/−/MCP-1−/− Mice After 12–14 weeks on a 1.25% cholesterol, cholate-free diet, mice were sacrificed and their aortas perfused with PBS. Aortas were dissected and opened along the ventral surface, pinned on a black wax background, fixed, and stained for lipids using Oil Red O. Red stain indicates lipid deposition. These are representative examples from the mid range of each genotype (upper, LDL-R−/−/MCP-1+/+; lower, LDL-R−/−/MCP-1−/−). Molecular Cell 1998 2, 275-281DOI: (10.1016/S1097-2765(00)80139-2)

Figure 3 Lipid Deposition in the Aortic Roots of LDL-R−/−/MCP-1+/+ and LDL-R−/−/MCP-1−/− Mice Frozen sections from the aortic roots were stained with Oil Red O as described in the Experimental Procedures. These are representative samples of the same anatomic level from LDL-R−/−/MCP-1+/+ mice (A) and LDL-R−/−/MCP-1−/− mice (B). Bar is 100 microns. Molecular Cell 1998 2, 275-281DOI: (10.1016/S1097-2765(00)80139-2)

Figure 4 Macrophage Infiltration into the Aortic Walls of LDL-R−/−/MCP-1+/+ and LDL-R−/−/MCP-1−/− Mice Frozen sections from the aortic arches of LDL-R−/−/MCP-1+/+ (A and B) and LDL-R−/−/MCP-1−/− (C and D) mice were stained with control rat IgG2b (A and C) or MOMA-2 (B and D) to identify macrophages. Bar is 100 microns. Molecular Cell 1998 2, 275-281DOI: (10.1016/S1097-2765(00)80139-2)