Molecular Weight(MW): 506.02
SRT1720 HCl is a selective SIRT1 activator with EC50 of 0.16 μM in a cell-free assay, but is >230-fold less potent for SIRT2 and SIRT3.
Cited by 18 Publications
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PAI-1 expression in HUVECs treated with drugs as indicated.(D) senescent HUVECs were treated with SRT1720, culturing for 24, 48 hours. PAI-1 mRNA and protein (E) levels were analyzed using real-time RT–PCR and Western blotting, respectively. The RNA and protein levels were normalized to the internal control β-actin. Data are presented as the mean±SEM of three independent experiments. *P < 0.05 vs. corresponding control. **P < 0.01 vs. corresponding control ***P < 0.001 vs. corresponding control.
Aging Cell 2014 13(5), 890-9. SRT1720 HCl purchased from Selleck.
C2C12 myoblasts were transfected with si-CON and si-NDUFV1 for 24 h and then further differentiated into myotubes for 4 days in the absence or presence of pyruvate (25 mM), SRT1720 (2 uM), or resveratrol (Resv; 25 uM). Myogenesis was monitored using MyHC immunofluorescence and DAPI.
J Biol Chem 2014 289(29), 20012-25. SRT1720 HCl purchased from Selleck.
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|Description||SRT1720 HCl is a selective SIRT1 activator with EC50 of 0.16 μM in a cell-free assay, but is >230-fold less potent for SIRT2 and SIRT3.|
The maximum activation ratio of SRT1720 versus the closest sirtuin homologues, SIRT2 (EC1.5 = 37 μM) and SIRT3 (EC1.5 > 300 μM) is up to 781%. SRT1720 binds to the SIRT1 enzyme-peptide substrate complex at an allosteric site amino-terminal to the catalytic domain and lower the Michaelis constant for acetylated substrates. SRT1720 could reduce fed glucose levels. Glucose excursion during an intraperitoneal glucose tolerance test is also significantly reduced in the SRT1720 group, and comparable to rosiglitazone, a PPARγ activator that has been used to treat type 2 diabetes. SRT1720 does not have an effect on fasting glucose in chow-fed mice, revealing that pharmacological SIRT1 activation is unlikely to induce hypoglycaemia. SRT1720 significantly reduces the hyperinsulinaemia after 4 weeks, partially normalizing increased insulin levels similar to rosiglitazone treatment. SRT1720 treatment increases mitochondrial capacity by 15% in gastrocnemius muscle as measured by citrate synthase activity.  Higher concentrations of SRT1720 (15 μM) induces a modest (10-20%) decrease in normal cell viability. SRT1720 also significantly inhibits VEGF-dependent MM cell migration. 
|In vivo||In DIO mice SRT1720 mimics several of the effects observed after calorie restriction including improved insulin sensitivity, normalized glucose and insulin levels, and increased mitochondrial capacity. In addition, in diet-induced obese and genetically obese mice, SRT1720 improves insulin sensitivity, lower plasma glucose, and increase mitochondrial capacity. Thus, SRT1720 is a promising new therapeutic agent for treating diseases of ageing such as type 2 diabetes. Consistent with improved glucose tolerance, the glucose infusion rate required to maintain euglycaemia is approximately 35% higher in SRT1720-treated fa/fa rats, and the total glucose disposal rate is increased by approximately 20%.  SRT1720 also prevents multiple myeloma tumor growth. SRT1720 increases the cytotoxic activity of bortezomib or dexamethasone. |
SIRT1 fluorescence polarization assay:In the SIRT1 FP assay, SIRT1 activity is monitored using a 20 amino acid peptide (Ac-Glu-Glu-Lys(biotin)-Gly-Gln-Ser-Thr-Ser-Ser-His-Ser-Lys(Ac)-Nle-Ser-Thr-Glu-Gly–Lys(MR121 or Tamra)-Glu-Glu-NH2) derived from the sequence of p53. The peptide is N-terminally linked to biotin and C-terminally modified with a fluorescent tag. The reaction for monitoring enzyme activity is a coupled enzyme assay where the first reaction is the deacetylation reaction catalyzed by SIRT1 and the second reaction is cleavage by trypsin at the newly exposed lysine residue. The reaction is stopped and streptavidin is added in order to accentuate the mass differences between substrate and product. The sensitivity of the FP assay allows identification of SRT1720. The fluorescence polarization reaction conditions are as follows: 0.5 μM peptide substrate, 150 μM βNAD+, 0-10 nM SIRT1, 25 mM Tris-acetate pH 8, 137 mM Na-Ac, 2.7 mM K-Ac, 1 mM Mg-Ac, 0.05% Tween-20, 0.1% Pluronic F127, 10 mM CaCl 2, 5 mM DTT, 0.025% BSA, and 0.15 mM nicotinamide. The reaction is incubated at 37 °C and stopped by addition of nicotinamide, and trypsin is added to cleave the deacetylated substrate. This reaction is incubated at 37 °C in the presence of 1 μM streptavidin. Fluorescent polarization is determined at excitation (650 nm) and emission (680 nm) wavelengths.
|In vitro||DMSO||38 mg/mL (75.09 mM)|
|In vivo||Add solvents individually and in order:
30% PEG400+0.5% Tween80+5% propylene glycol
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