opa1  (Cell Signaling Technology Inc)

Journal: Journal of Sport and Health Science

Article Title: Influence of diet-induced obesity and voluntary exercise training on cardiac lipids and mitochondrial function in mice

doi: 10.1016/j.jshs.2025.101095

Figure Lengend Snippet: Voluntary exercise alters left ventricle gene and protein expression related to mitochondrial biogenesis and dynamics in high fat- and chow-fed mice. (A) Western blot analysis to assess purity of crude mitochondria isolation where left ventricle mitochondrial pellet expresses mitochondrial marker TOM70 and COXIV and supernatant expresses calnexin. Protein expression of (B) LCLAT1 and (C) MFN2 in left ventricle-isolated crude mitochondria and (D) LCLAT1, (E) PGC-1α, and (F) MFN2 in left ventricle tissue from male VET or sedentary mice fed an HFD or chow diet. Left ventricle mRNA expression of (G) OPA1 and (H) DRP1 in male VET or sedentary mice fed an HFD or chow diet. Values were calculated relative to 18S housekeeper. Calnexin and β-actin were used as internal controls of protein loading in left ventricle samples and COXIV as internal control of protein loading in crude mitochondria samples. Analysis was performed using two-way analysis of variance with Tukey’s post hoc test for multiple comparisons. Data are expressed as mean ± standard error of the mean. (B–C) n : 5–6 per group. (D–F) n = 7 per group. (G and H) n = 9 per group. CE = chow exercise; CS = chow sedentary; COXIV = cytochrome c oxidase subunit 4; DRP1 = dynamin-related protein 1; HE = high fat diet exercise; HFD = high fat diet; HS = high fat diet sedentary; LCLAT1 = lysocardiolipin acyltransferase 1; MFN2 = mitofusin-2; OPA1 = optic atrophy 1; PGC-1α = peroxisome proliferator-activated receptor gamma coactivator-1α; TOM70 = translocase of outer mitochondria membrane 70; VET = voluntary exercise training.

Article Snippet: The following TaqMan assay gene transcripts were used: fatty acid-binding protein 3 (FABP3, Mm02342495_m1), platelet glycoprotein 4 (CD36, Mm00432403_m1), beta myosin heavy chain (β-MHC, Mm00600555_m1), atrial natriuretic peptide (ANP, Mm01255747_g1), OPA1 (Mm01349707_g1), DRP1 (Mm01342903_m1), robosomal18S (18S, Mm03928990_g1).

Techniques: Expressing, Western Blot, Isolation, Marker, Control, Membrane

Journal: Materials Today Bio

Article Title: A dual-responsive CO-releasing nanogel ameliorates retinal ischemia–reperfusion injury by restoring mitochondrial homeostasis and attenuating cGAS-STING pathway activation

doi: 10.1016/j.mtbio.2026.102974

Figure Lengend Snippet: COPN restores mitochondrial quality control and interrupts the ROS‒cGAS‒inflammation axis in OGD/R-treated R28 cells. a , TEM images showing changes in the mitochondrial ultrastructure of R28 cells subjected to various treatments (PBS, PDNs, COPN-L, and COPN-H) after OGD/R. Scale bar: 500 nm b , Quantitative analyses of mitochondrial length and number in R28 cells as indicated in a . c , Representative fluorescence images showing JC-1 staining of the mitochondrial Δψm: aggregates (red) indicate healthy mitochondria, whereas monomers (green) represent depolarized mitochondria. Nuclei were stained with DAPI (blue). Scale bar: 50 μm d , Intracellular ATP content assay revealing improved energy production after COPN treatment under OGD/R stress conditions. e , mRNA expression analysis of mitochondrial dynamic regulatory genes (Opa1, Mfn2, Drp1, and Fis1) and mitochondrial DNA transcription levels (mt-ND1 and mt-COX1). f , Quantitative analysis of the JC-1 fluorescence ratio (aggregates/monomers) and mitochondrial ROS levels (MitoSOX staining). g–h , Western blot analysis of proteins involved in mitochondrial autophagy (Pink1, Parkin, and P62) (g) and mitochondrial fusion/fission (Opa1, Mfn2, Mfn1, Drp1, and Fis1) (h) . i , Confocal fluorescence microscopy images of mitochondria (green, MitoTracker) and lysosomes (red, LysoTracker) in R28 cells after different treatments. Nuclei were stained with Hoechst (blue). Scale bar: 50 μm ∗ ∗∗∗P < 0.0001. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)

Article Snippet: The following primary antibodies were used: Drp1 (CST, #8570, 1:1000, ∼80 kDa), Fis1 (Proteintech, 10956-1-AP, 1:1000, ∼17 kDa), Mfn1 (Abcam, ab104274, 1:1000, ∼84 kDa), Mfn2 (CST, #9482, 1:1000, ∼86 kDa), Opa1 (CST, #80471, 1:1000, ∼100–120 kDa), Pink1 (CST, #6946, 1:1000, ∼63 kDa), cGAS (CST, #15102, 1:1000, ∼60 kDa), STING (CST, #13647, 1:1000, ∼42–45 kDa), TBK1 (CST, #3013, 1:1000, ∼84 kDa), p-TBK1 (CST, #5483, 1:1000, ∼84 kDa), COX IV (Abcam, ab14744, 1:2000, ∼17 kDa), β-actin (Proteintech, 66009-1-Ig, 1:5000, ∼43 kDa), and GAPDH (Proteintech, 60004-1-Ig, 1:5000, After washing, the membranes were incubated with HRP-conjugated secondary antibodies (goat anti-rabbit or goat anti-mouse IgG, CST, 1:5000) for 1 h at room temperature.

Techniques: Control, Fluorescence, Staining, Expressing, Western Blot, Microscopy