Journal: eLife
Article Title: Discovery and functional assessment of a novel adipocyte population driven by intracellular Wnt/β-catenin signaling in mammals
doi: 10.7554/elife.77740
Figure Lengend Snippet: Figure 5. Wnt+ adipocytes are essential for initiating adaptive thermogenesis. (A) Immunofluorescent staining of mitochondrial membrane potentials in Wnt+ adipocytes induced from iBAT-derived SVF cells of T/L-GFP mice. n = 5 independent experiments. Scale bar, 100 μm; close-up scale bar, 20 μm. (B) Quantification of staining in (A). AOD, average optical density. Data are mean ± s.e.m., unpaired Student’s t-test; ***p < 0.001. (C) OCR plots of four groups of adipocytes differentiated from GFPpos-1, GFPpos-2, GFPneg-1, and mBaSVF cell lines, respectively. n = 3 independent experiments. (D) Immunofluorescent staining of iWAT from T/L-GFP mice with 4-day thermal challenge showing close association of Wnt+ adipocytes with UCP1+ beige adipocytes. n = 5 mice. Scale bar, 100 μm. (E) Immunofluorescent staining of iWAT from tamoxifen-treated Tcf/LefCreERT2;Rosa26RmTmG mice after 4-day cold exposure. n = 8 mice. Scale bar, 50 μm. (F) Immunofluorescent staining of iWAT from tamoxifen-treated T/L-DTA mice after 4-day cold exposure. Before cold challenge, mice were rested for 48 hr after final tamoxifen treatment. n = 7 mice. Scale bar, 50 μm. (G) Quantitative RT- PCR analysis of gene expression in iWAT from control (Fabp4-Flex-DTA) and T/L-DTA mice in (F). n = 6 and 7 mice. Levels of mRNA expression are normalized to that of Adipoq. (H) Western blot analysis showing protein levels of UCP1, OXPHOS complexes, and β-actin in iWAT from tamoxifen- treated controls and T/L-DTA mice under cold (6 °C) and ambient (22 °C) temperatures. n = 4 mice. (I) Immunofluorescent staining for UCP1 (green) and Perilipin (red) in the iWAT from control and Akita mice. Scale bars, 50 μm. Data are mean ± s.e.m., *p < 0.05, ** p < 0.01, ***p < 0.001, n.s., not significant, two-way repeated ANOVA followed by Bonferroni’s test (C) or unpaired Student’s t-test (G).
Article Snippet: Fabp4- Flex- DTA transgenic construct was generated by inserting the coding sequence of diphtheria toxin A (DTA) into the pBS Fabp4 promoter (5.4 kb) polyA vector (Addgene, 11424), flanked by flip- excision (FLEX) switch.
Techniques: Staining, Membrane, Derivative Assay, Quantitative RT-PCR, Gene Expression, Control, Expressing, Western Blot