Conditional deletion of MHC II on B cells does not regulate atherosclerotic plaque development in Ldlr−/− mice. Conditional deletion of MHC II on B cells.

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Conditional deletion of MHC II on B cells does not regulate atherosclerotic plaque development in Ldlr−/− mice. Conditional deletion of MHC II on B cells does not regulate atherosclerotic plaque development in Ldlr−/− mice. (A) Spleens from naive CD19cre/+MHC IIf/f Ldlr−/− or littermate control mice were assayed for B cell expression of MHC II by flow cytometry. (B) Spleen B cell subsets were identified in the spleens of chow fed CD19cre/+MHC IIf/f Ldlr−/− mice to assess cellularity changes. Following 8 or 20 wk of HFD feeding, CD19cre/+MHC IIf/f Ldlr−/− mice were assessed for plaque development in the aortic sinus (scale bar, 250 μm) (C) and aortic arch (original magnification ×10) (D) by ORO staining. (E) Total plaque area and percentage of plaque staining area was quantified. (F) Representative image of an aortic sinus from 8 wk HFD-fed wild-type mouse stained for macrophage (MOMA2) and smooth muscle cell content (smooth muscle actin; SMA). Scale bar, 100 μm. (G) Percentage of macrophage and SMA content was quantified. (A) Representative or (B) combined data from two independent experiments containing three to five mice per group. (C–E and G) Data are representative of two or three independent experiments containing five to nine animals per group each. *p ≤ 0.05, **p ≤ 0.01, by nonparametric Student t test. Jesse W. Williams et al. ImmunoHorizons 2019;3:37-44 Copyright © 2019 The Authors