Journal: Advanced Science
Article Title: ATF5‐Dependent GDF15 Expression Mediates Anesthesia‐Induced Neuroprotection Against Stroke
doi: 10.1002/advs.202417086
Figure Lengend Snippet: Sevoflurane‐induced activation of ATF5‐dependent UPR mt , GDF15 expression, and mitochondrial protection are absent in cerebral cortices of aged mice. A) Western blot analysis of ATF5 protein levels in the cortex of mice at 2‐, 8‐, 14‐, and 20‐month of age (n = 5 per group). B) Gdf15 mRNA expression in the cortex at 2‐, 8‐, 14‐, and 20‐ months, determined by RT‐qPCR and normalized to β‐actin (n = 3–4 per group). C) Mitochondrial OCR in isolated cortical mitochondria from 2‐, 8‐, 14‐, and 20‐month‐old mice. Left: Representative OCR traces in response to sequential addition of ADP, oligomycin, CCCP, and antimycin. Right: Quantification of basal, state 3, state 4o, and state 3u respiration. D) Volcano plot showing differential expression of 83 mitochondrial energy metabolism‐related genes in the cortex of 20‐month‐old versus 2‐month‐old mice. Red dots, upregulated genes; blue dots, downregulated genes; black dots, non‐significant changes. E) Western blot analysis of proteins in cortical samples from aged mice obtained 24 h after sevoflurane exposure (n = 5 per group). F) Volcano plot showing changes in mitochondrial energy metabolism‐related genes in the cortex of aged mice 6 h after sevoflurane exposure (n = 3–4 per group). G) Left: Mitochondrial function assessed by OCR in isolated cortical mitochondria from aged mice in control and sevoflurane‐treated groups (n = 4–5 per group). Sequential additions of ADP, oligomycin, CCCP, and antimycin are indicated by arrows. Right: Quantification of OCR, excluding non‐mitochondrial respiration (n = 4–5 per group). Values are presented as means ± SD (n.s., not significant; * p < 0.05).
Article Snippet: Conditional Atf5 knockout ( Atf5 cKO) mice were generated by crossing Emx1‐IRES‐Cre knock‐in mice with floxed Atf5 ( Atf5 fl/fl ) mice in which exon 3 was targeted (Cyagen Biosciences, CA, USA).
Techniques: Activation Assay, Expressing, Western Blot, Quantitative RT-PCR, Isolation, Quantitative Proteomics, Control