Journal: Redox Report : Communications in Free Radical Research
Article Title: ASIC1a Promotes nucleus pulposus derived stem cells apoptosis through modulation of SIRT3-dependent mitochondrial redox homeostasis in intervertebral disc degeneration
doi: 10.1080/13510002.2025.2504120
Figure Lengend Snippet: ASIC1a disturbed the mitochondrial redox homeostasis and increased apoptosis by regulating SIRT3. Human NPSCs were transfected with negative control siRNA (si-Control) or siRNA (si-ASIC1a or si-SIRT3), negative control plasmid (vector) or ASIC1a plasmid (OE-ASIC1a), and then treated with or without acidosis. (A-D) Representative western blotting assay and quantitation of the levels of SIRT3 and SOD2. (E-I) Representative western blotting assay and quantitation of the levels of SIRT3, SOD2, cleaved caspase 3, and the ratio of Bcl-2/Bax. (J, K) Representative fluorescent images with DCFH-DA (green) staining. Scale bar: 100 μM. (L, M) Representative fluorescence images with MitoSOX (red) and MitoTracker (green) double – staining. Cell nuclei are stained by DAPI. Scale bar: 50 μM. (N, O) TUNEL staining to detect human NPSCs apoptosis induced by acidosis treatment and analyzed using fluorescence microscope. Cell nuclei are stained by DAPI. Scale bar: 50 μM. (P, Q) JC-1 staining to detect the level of MMP in acidosis-treated human NPSCs and analyzed using fluorescence microscope. Scale bar: 50 μM. (R, S) Representative western blotting assay and quantitation of the level of the ratio of cytochrome c (Cyt-c) in mitochondrial and cytoplasmic extracts. Data are mean ± SD, * indicating P ≤ 0.05, ** indicating P ≤ 0.01, *** indicating P ≤ 0.001. NPSC, nucleus pulposus-derived stem cell.
Article Snippet: The primary antibodies utilized included ASIC1a (Huaan ER1803-33, 1:1000), SIRT1 (Huaan ER130811 , 1:1000), SIRT2 (Huaan ET1611-72, 1:1000), SIRT3 (Immunoway YT4304, 1:1000), SIRT4 (Proteintech 66543-ig, 1:20000), SIRT5 (Huaan ET1701-6, 1:1000), SIRT6 (Huaan ET1701-29, 1:1000), SIRT7 (Huaan EM1707-09, 1:1000), BAX (Proteintech 50599-2-ig, 1:5000), Bcl-2 (Proteintech 26593-1-AP, 1:2000), Active Caspase-3 (Huaan ET1602-47, 1:1000), Cytochrome C (Huaan ET1610-16, 1:1000), SOD2 (Immunoway YT5575, 1:1000), AMPK (Huaan ET1608-40, 1:4000), p-AMPK (Huaan ET1612-72, 1:1000), PGC-1α (Huaan ET1702-96, 1:1000), VDAC (Huaan ET1601-20, 1:10000), and Beta Actin (Proteintech 20536-1-AP, 1:10000).
Techniques: Transfection, Negative Control, Control, Plasmid Preparation, Western Blot, Quantitation Assay, Staining, Fluorescence, Double Staining, TUNEL Assay, Microscopy, Derivative Assay