TTNPB (Arotinoid Acid)
Catalog No.S4627 Synonyms: Ro 13-7410,AGN-191183
Molecular Weight(MW): 348.48
TTNPB (Arotinoid Acid) is a potent RAR agonist, and inhibits binding of [3H]tRA with IC50 of 5.1 nM, 4.5 nM, and 9.3 nM for human RARα, β, and γ, respectively.
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|Description||TTNPB (Arotinoid Acid) is a potent RAR agonist, and inhibits binding of [3H]tRA with IC50 of 5.1 nM, 4.5 nM, and 9.3 nM for human RARα, β, and γ, respectively.|
TTNPB binds to nuclear retinoic acid receptors with high affinity, inhibits binding of [3H]tRA with IC50 of 3.8 nM, 4.0 nM, and 4.5 nM for mRARα, β, and γ, respectively.  TTNPB increases transcriptional activation of Mouse RARs in JEG-3 cells after 72 h using conditioned media with EC50 of 2.0 nM, 1.1 nM and 0.8 nM for mRARα, β, and γ, respectively.  TTNPB inhibits the growth of normal human mammary epithelial cells (HMECs) and estrogen receptor-positive (ER-positive) breast cancer cells by inducing G1 cell cycle blockade.  TTNPB causes a concentration-dependent decrease in ES-D3 cell differentiation. 
|In vivo||TTNPB (0.25 mg/kg) causes growth inhibition in both MXT-HS and MXT-HI models by inducing cell apoptosis. |
Binding assays:Binding assays are performed as previously described (Allenby et al., 1993, 1994). Briefly, labeled and unlabeled retinoids are added to nucleosol or cytosolic fractions in ethanol so that the total amount of ethanol added is constant in all tubes and did not exceed 2% of the incubation volume. The receptor preparations are incubated with retinoids at 4°C for 4–6 hr. Sephadex PD-10 desalting columns are used to separate bound radioligand from free radioligand after equilib- rium is achieved. For competitive binding assays, varying concentrations of unlabeled competing ligand are incubated with the appropriate nucleosol or cytosol in the presence of a fixed concentration of [3H]tRA (sp. act. 49.3 Ci/mmol) or [3H]9-cis RA (sp. act. 24.0 Ci/mmol). Final concentrations of [3H] tRA and [3H]9-cis RA for nuclear receptor binding assays are 5nM. Final concentrations of [3H] tRA for CRABP binding assays is 30 nM. The IC50s are calculated as described above (DeLean et al., 1978). For saturation kinetics, increasing concentrations of radiolabeled ligand ([3H]tRA sp. act. 49.3 Ci/mmol, [3H]TTNPB sp. act. 5.5 Ci/ mmol) are added to the nucleosol of the appropriate receptor subtype in the presence (nonspecific binding) or absence (total binding) of a 100-fold molar excess of the corresponding unlabeled retinoid. Specific binding is defined as the total binding minus nonspecific binding. Saturation kinetics are calculated as previously described (Scatchard, 1949; Grippo and Gudas, 1987; Levin et al., 1992).
-  Pignatello MA, et al. Toxicol Appl Pharmacol. 1997, 142(2), 319-327.
-  Pignatello MA, et al. Toxicol Appl Pharmacol. 1999, 159(2), 109-116.
-  Wu K, et al. Breast Cancer Res Treat. 2006, 96(2), 147-157.
|In vitro||DMSO||15 mg/mL warmed (43.04 mM)|
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