Journal: JCI Insight
Article Title: Platelets impair the resolution of inflammation in atherosclerotic plaques in insulin-resistant mice after lipid lowering
doi: 10.1172/jci.insight.193593
Figure Lengend Snippet: ( A ) Study design. Eight-week-old Ldlr –/– male mice fed a high-fat, high-cholesterol (HFHC) diet for the whole duration of the study (23 weeks). After the atherosclerosis progression period (obese baseline, Ob), mice were injected with ApoB ASO to lower lipids (lipid-lowering period). All lipid-lowered mice were split into 2 groups, injected either with isotype control antibody (IgG) or platelet depletion antibody (αCD42b) every 3 days for a total of 3 weeks. ( B ) Platelet counts in circulating blood of Ob, IgG, and αCD42b 3 days before harvest. ( C ) Blood glucose measurements (lean n = 16, Ob n = 47) and ( D ) area of curve (AOC) quantification of glucose tolerance tests (GTTs) from lean, Ob, IgG, and αCD42b mice after 16 weeks of HFHC diet during atherosclerosis progression. ( E ) Blood glucose measurements (Ob n = 3, IgG n = 4, αCD42b n = 4) and ( F ) AOC quantification of GTTs from Ob, IgG, and αCD42b mice after 22 weeks of HFHC diet during atherosclerosis resolution. Mean fluorescent intensity (MFI) of platelet ( G ) JonA and ( H ) P-selectin in nonstimulated (NS) samples and upon 100 μM PAR4-AP agonist stimulation of lean and Ob circulating blood samples. ( I ) Mean platelet volume (MPV) from circulating blood of lean, Ob, and IgG-treated mice, 3 days before harvest. In C and E , error bars represent SD. Data were analyzed by Kruskal-Wallis with Dunn’s post hoc test ( B and F ), unpaired Mann-Whitney test ( C , D , and H ), unpaired Student’s t test ( G ), or ordinary 1-way ANOVA with Tukey’s multiple-comparison test ( I ). P values are shown in graphs.
Article Snippet: The whole blood was stained with anti–mouse JonA-PE (M023-2, Emfret Analytics) and anti–mouse P-selectin Alexa Fluor 647 (563674, BD Biosciences) and then treated with PAR4-AP platelet agonist (100 μM; MedChemExpress) for 15 minutes at room temperature.
Techniques: Injection, Control, MANN-WHITNEY, Comparison