Accumulation of lipofuscin, basal deposits, thickening of the outer collagenous layer and loss of fenestrations in CC endothelium in RPE of Pgc-1α+/− mice.

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From: Cfh Genotype Interacts With Dietary Glycemic Index to Modulate Age-Related Macular Degeneration-Like Features in Mice Invest. Ophthalmol. Vis. Sci..

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Presentation transcript:

Accumulation of lipofuscin, basal deposits, thickening of the outer collagenous layer and loss of fenestrations in CC endothelium in RPE of Pgc-1α+/− mice fed with HFD. (A-D) Representative TEM images of RPE cytoplasm. Accumulation of lipofuscin, basal deposits, thickening of the outer collagenous layer and loss of fenestrations in CC endothelium in RPE of Pgc-1α+/− mice fed with HFD. (A-D) Representative TEM images of RPE cytoplasm. (A) WT mice fed RD showing a low amount of lipofuscin. (B) WT mice fed HFD showing elevated amounts of lipofuscin. (C) Pgc-1α+/− (HET) mice fed RD showing elevated amounts of lipofuscin. (D) HET mice fed HFD showing high amounts of lipofuscin. (E-H) Representative TEM images of BM. (E) WT mice fed RD showing normal basal infoldings and normal fenestrations of the CC endothelium (double arrows). (F) WT mice fed HFD showing an accumulation of basal laminar deposits and fewer fenestrations of the CC endothelium. (G) HET mice fed RD showing an accumulation of basal laminar deposits and fewer fenestrations of the CC endothelium. (H) HET mice fed HFD showing large accumulations of basal laminar deposits, deposits in the OCL layer and loss of fenestrations of the CC endothelium (n=5 WT/RD, n=5 WT/HFD, n=5 HET/RD, n=5 HET/HFD). BI, basal infoldings; BLamD, basal laminar deposits; L, lipofuscin; M, melanosomes; Mv, microvilli; Nu, nucleus; OCL, outer collagenous layer. (I) Area of lipofuscin per 100 µm2 of cytoplasm, measured from five representative areas from each group and analyzed with Image J analysis software. Pgc-1α+/− mice fed RD and HFD presented higher number of lipofuscin deposits as compared with WT fed RD. HFD increases the number of lipofuscin deposits in WT. (J) Number of fenestrations per 1 µm of CC endothelium, counted from four representative areas from each group. Pgc-1α+/− mice fed HFD present the lowest number of CC endothelium fenestrations. One-way ANOVA followed by Dunnett's multiple comparisons test was performed using GraphPad Prism7. Meng Zhang et al. Dis. Model. Mech. 2018;11:dmm032698 © 2018. Published by The Company of Biologists Ltd