Fig. 1

MSU crystals stimulation reduced the expression and deacetylation activity of Sirt3. a Sirt3 mRNA and protein levels were detected in PBMCs of health controls (HC), patients with acute gout (AG), and intermittent gout (IG). Sirt3 mRNA detection (HC, n = 24), (AG, n = 24), (IG, n = 24); GAPDH was used as an internal reference. Sirt3 protein detection (HC, n = 6), (AG, n = 6), (IG, n = 6), TUBULIN as an internal reference. b BMDMs were respectively stimulated with C16:0, MSU, or C16:0 + MSU for 12 h and Western blot was used to detect Sirt3 protein expression. c The protein levels of Sirt3 in the mouse paw treated with MSU crystals or vehicle. Data presented as mean ± SD (n = 5 mice per group). *P < 0.05. NS means no statistical difference. d Sirt3 agonists (Viniferin) inhibited the acetylation level of mitochondrial proteins in BMDMs treated with Viniferin (1 μM) and C16:0 + MSU crystals for 12 h. Acetyl-conjugated proteins in mitochondrial proteins were blotted with acetylated-lysine antibody. e Viniferin treatment decreased K68 lysine acetylation of mitochondrial SOD2 protein and mitochondrial proteins were analyzed by Western blot in BMDMs. f The activity of SOD in the mitochondrial proteins of BMDMs was detected with WST-8 method. Data are mean ± SD. Three independent repetitive experiments were conducted for each result. *P < 0.05. NS represents P > 0.05