Catalog No.S8065 Synonyms: (+)-Nutlin-3
Molecular Weight(MW): 581.49
Nutlin-3b is a p53/MDM2 antagonist or inhibitor with IC50 value of 13.6 μM, 150-fold less potent (+)-enantiomer of Nutlin-3 as in comparison with opposite (-)-enantiomer Nutlin-3a.
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Dissociative effect of Nutlin-3a, Nutlin-3b, and RO-5963 on the preformed p53·MDM2 complex. Representative electrophoresis polyacrylamide gels in nondenaturing conditions for the analysis of the dissociation power of the inhibitors tested. (A) The reaction mixture containing 25 M p53·MDM2 complex, treated in the absence (lane 3) or in the presence (lanes 4-14) of 0.040, 0.060, 0.080, 0.12, 0.33, 0.67, 1.33, 3.33, 6.67, 33.33, and 333.33 μM Nutlin-3a, respectively, were run on a 12% nondenaturing polyacrylamide gel. Thirty micromolar MDM2 and p53 was run alone in lanes 1 and 2, respectively. (B) As in (A), but using Nutlin-3b, at concentration of (lanes 4-14) of 1.33, 6.67, 13.33, 20.00, 66.67, 133.33, 266.67, 333.33, 400.00, 833.33, and 1666.67 μM. p53 and MDM2 (25 μM both) were run alone in lanes 1 and 2, respectively. (C) As in (A), but using RO-5963, at concentration of 0.10, 0.21, 0.42, 0.83, 1.67, 3.33, 8.33, 16.67, 33.33, 166.67, and 333.33 μM (lanes 4-14), respectively. (D) The percentage of the residual p53·MDM2 complex was reported in a semilogarithmic plot, at the corresponding concentration of Nutlin-3a (empty circles), RO-5963 (triangles), and Nutlin-3b (filled circles), respectively. (E) The percentage of MDM2 dissociated from the complex was reported as a function of the inhibitor concentration. Curve fitting was done using the hyperbolic function. Symbols as in (D).
Electrophoresis, 2015, 36(24):3101-4. Nutlin-3b purchased from Selleck.
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|Description||Nutlin-3b is a p53/MDM2 antagonist or inhibitor with IC50 value of 13.6 μM, 150-fold less potent (+)-enantiomer of Nutlin-3 as in comparison with opposite (-)-enantiomer Nutlin-3a.|
Nutlin-3b is useful as a negative control s for non-MDM2-related cellular activities. Nutlin-3a induces the expression of MDM2 and p21 (but not p53) only in cells with wild-type p53. Nutlin-3b has no effect regardless of the p53 status of the cells. Only the active enantiomer Nutlin-3a shows a potent antiproliferative activity and clear separation of potency between the cells harboring wild-type p53 and those harboring mutant p53. The potency of Nutlin-3b is much lower in the wild-type p53 cells and nearly identical to the potency of Nutlin-3a against the mutant p53 cells. After 48 hours of exposure to the Nutlin-3a, 45% of the cell population became TUNEL positive, but cells treated with the Nutlin-3b are indistinguishable from the untreated controls. 
Biacore study:Competition assay is performed on a Biacore S51. A Series S Sensor chip CM5 is utilized for the immobilization of a PentaHis antibody for capture of the His-tagged p53. The level of capture is ~200 response units (1 response unit corresponds to 1 pg of protein per mm 2). The concentration of MDM2 protein is kept constant at 300 nM. Nutlin-3 is dissolved in DMSO at 10 mM and further diluted to make a concentration series of Nutlin-3 in each MDM2 test sample. The assay is run at 25°C in running buffer (10 mM Hepes, 0.15 M NaCl, 2% DMSO). MDM2-p53 binding in the presence of Nutlin-3 is calculated as a percentage of binding in the absence of Nutlin-3 and IC50 is calculated
|In vitro||DMSO||100 mg/mL (171.97 mM)|
|Ethanol||100 mg/mL (171.97 mM)|
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