Journal: Cellular and Molecular Life Sciences: CMLS
Article Title: SIRT1 maintains bone homeostasis by regulating osteoblast glycolysis through GOT1
doi: 10.1007/s00018-023-05043-9
Figure Lengend Snippet: SIRT1 inhibited GOT1 enzyme activity by catalyzing its lysine deacetylation. A The concentration of Asp in the femurs of the control and cKO mice aged 8 weeks measured by an ELISA Kit (n = 8/group). B The concentration of malate in the femurs of the control and cKO mice aged 8 weeks measured by an ELISA Kit (n = 8/group). C The activity of GOT1 in the femurs of the control and cKO mice aged 8 weeks measured by an ELISA Kit (n = 8/group). D The subcellular localization of SIRT1 and GOT1 in primary osteoblasts. E The protein level and Kac level of GOT1 upon Sirt1 deletion or overexpression in 3T3E1 cells. F The Kac level of GOT1 in Sirt1 knockout 3T3E1 cells upon Sirt1 overexpression. G The Kac level of GOT1 in 3T3E1 cells treated with SRT2104 or EX-527. H The Kac level of GOT1 protein immunoprecipitated from 3T3E1 cells transfected with SIRT1 plasmids or mutant SIRT1-H355A plasmids. I Control and Sirt1 knockout 3T3E1 cells were transfected with Wild-type GOT1 or GOT1-K318R mutant plasmids. The Kac level of GOT1 protein immunoprecipitated from the above cells. J Sirt1-knockout/Got1- knockout 3T3E1 cells were transfected with Wild-type GOT1 or GOT1-K318R mutant plasmids. The GOT1 activity was measured in the above cells. K Sirt1-knockout/Got1- knockout 3T3E1 cells were transfected with Wild-type GOT1 or GOT1-K318R mutant plasmids. The levels of F6P in glycolysis were measured in the above cells. L Sirt1-knockout/Got1- knockout 3T3E1 cells were transfected with Wild-type GOT1 or GOT1-K318R mutant plasmids. The levels of PEP in glycolysis were measured in the above cells. M Sirt1-knockout/Got1- knockout 3T3E1 cells were infected with Wild-type GOT1 or GOT1-K318R mutant virus. The ALP staining of osteoblast mineralization was conducted in the above cells. Data are presented as the mean ± SD, Student’s t test (a, b, c); one-way ANOVA with Tukey’s test (j, k, l), *P < 0.05, **P < 0.01, ***P < 0.001
Article Snippet: To inhibit the activity of GOT1, mice aged 8 weeks were treated with vehicle (saline) and/or 10 mg/kg aminooxyacetic acid (AOA) (MedChemExpress, HY-107994) every other day until dissection at 16 weeks, and osteoblasts were treated with vehicle or 100 μM AOA for 48 h.
Techniques: Activity Assay, Concentration Assay, Control, Enzyme-linked Immunosorbent Assay, Over Expression, Knock-Out, Immunoprecipitation, Transfection, Mutagenesis, Infection, Virus, Staining