Figure 2. | Mouse Tmem135 mutation reveals a mechanism involving mitochondrial dynamics that leads to age-dependent retinal pathologies
Mouse Tmem135 mutation reveals a mechanism involving mitochondrial dynamics that leads to age-dependent retinal pathologies
University of Wisconsin-Madison, United States; Morgridge Institute for Research, United States; Northwestern University, United States; University of Iowa, United States; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, United States
Download figureOpen in new tabFigure 2. FUN025 mice show AMD-like pathologies.
(A) Punctate light deposits were found in the fundus photography of the eyes from WT and FUN025 mice. (B) Autofluorescent cells/aggregates (indicated by arrows) and lipofuscin-like autofluorescence were observed in proximity to the apical surface of the RPE in FUN025 mice. Scale bar = 60 μm. (C) Iba1 (microglia/ macrophage marker) and F4/80 (macrophage marker) positive cells were found in the FUN025 retina at seven months, whereas very few Iba1 positive cells were found in the WT retina at seven months. Scale bar = 20 μm. (D) Signals for inflammasome markers, NLRP3 and caspase1, increased in the RPE in both peripheral and central retina from FUN025 mice compared to WT control. (E) At seven months of age, the RPE (highlighted by CRALBP staining) thickness is significantly increased in both central and peripheral retina of FUN025 mice compared to control mice. The RPE nuclei were highlighted with Otx1+Otx2. Data from n = 4 mice per genotype. (F) Transcorneal electroretinograms (ERG) recordings from seven-month-old FUN025 mice and their WT littermates. Both scotopic (dark-adapted) ERG a- and b-waves from the rod pathway were markedly reduced in FUN025 mice. A reduction was also observed in photopic (light-adapted) ERG b-wave from the cone pathway with higher flash intensity, while no difference between FUN025 and WT was observed in the photopic a-wave, majority of which is postreceptoral in origin. Data from n = 5 mice per genotype. *p<0.05, two-way analysis of variance (ANOVA). All data are mean ± standard error of the mean (s.e.m.).