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    Tubastatin A HCl (AG-CR-13900, TubA)
    Tubastatin A HCl (AG-CR-13900, TubA)

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    This product is for research use only, not for human use. We do not sell to patients.
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    InvivoChem Cat #: V0281
    CAS #: 1310693-92-5Purity ≥98%

    Description: Tubastatin A HCl, the hydrochloride salt of Tubastatin A (also known as TubA, AG-CR-13900), is a tubacin analog that acts as a potent and specific inhibitor of histone deacetylase 6 (HDAC6) with potential antitumor, neuroprotective and anti-inflammatory activities. It exhibits the highest selectivity (>1,000-fold) for inhibiting HDAC6 over other HDAC isoforms excluding HDAC8 for which the IC50 is 0.9 μM. 

    References: J Am Chem Soc. 2010 Aug 11;132(31):10842-6; Mol Cell Biol. 2011 May;31(10):2066-78; PLoS One. 2011;6(12):e28563.

    Related CAS #1310693-92-5 (HCl); 1252003-15-8 (free base)


    Publications Citing Use of InvivoChem Tubastatin A HClScientific Reports | (2020) 10:6064 | https://doi.org/10.1038/s41598-020-62678-5

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    Molecular Weight (MW)371.86
    FormulaC20H21N3O2.HCl
    CAS No.1310693-92-5
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 74 mg/mL (199.0 mM)
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    Solubility (In vivo)1% DMSO+30% polyethylene glycol+1% Tween 80: 30 mg/mL
    Synonyms

    AG-CR-13900, TubA; Tubastatin A hydrochloride; Tubastatin A HCl; TSA HCl

    Chemical Name: N-hydroxy-4-((2-methyl-3,4-dihydro-1H-pyrido[4,3-b]indol-5(2H)-yl)methyl)benzamide hydrochloride

    InChi Key: LJTSJTWIMOGKRJ-UHFFFAOYSA-N

    InChi Code: InChI=1S/C20H21N3O2.ClH/c1-22-11-10-19-17(13-22)16-4-2-3-5-18(16)23(19)12-14-6-8-15(9-7-14)20(24)21-25;/h2-9,25H,10-13H2,1H3,(H,21,24);1H

    SMILES Code: O=C(NO)C1=CC=C(CN2C3=C(CN(C)CC3)C4=C2C=CC=C4)C=C1.[H]Cl 


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    In Vitro

    In vitro activity: Tubastatin A is substantially selective for all 11 HDAC isoforms and maintains over 1000-fold selectivity against all isoforms excluding HDAC8, where it has approximately 57-fold selectivity. In homocysteic acid (HCA) induced neurodegeneration assays, Tubastatin A displays dose-dependent protection against HCA-induced neuronal cell death starting at 5 μM with near complete protection at 10 μM. At 100 ng/mL Tubastatin A increases Foxp3+ T-regulatory cells (Tregs) suppression of T cell proliferation in vitro. Tubastatin A treatment in C2C12 cells would lead to myotube formation impairment when alpha-tubulin is hyperacetylated early in the myogenic process; however, myotube elongation occurs when alpha-tubulin is hyeperacetylated in myotubes. A recent study indicates that Tubastatin A treatment increases cell elasticity as revealed by atomic force microscopy (AFM) tests without exerting drastic changes to the actin microfilament or microtubule networks in mouse ovarian cancer cell lines, MOSE-E and MOSE-L.


    Kinase Assay: Enzyme inhibition assays are performed by the Reaction Biology Corporation, Malvern, PA, using the Reaction Biology HDAC Spectrum platform. (www.reactionbiology.com) The HDAC1, 2, 4, 5, 6, 7, 8, 9, 10, and 11 assays use isolated recombinant human protein; HDAC3/NcoR2 complex is used for the HDAC3 assay. Substrate for HDAC1, 2, 3, 6, 10, and 11 assays is a fluorogenic peptide from p53 residues 379-382 (RHKKAc); substrate for HDAC8 is fluorogenic diacyl peptide based on residues 379-382 of p53 (RHKAcKAc). Acetyl-Lys (trifluoroacetyl)-AMC substrate is used for HDAC4, 5, 7, and 9 assays. Tubastatin A is dissolved in DMSO and tested in 10-dose IC50 mode with 3-fold serial dilution starting at 30 μM. Control Compound Trichostatin A (TSA) is tested in a 10-dose IC50 with 3-fold serial dilution starting at 5 μM. IC50 values are extracted by curve-fitting the dose/response slopes.


    Cell Assay: Primary cortical neuron cultures are obtained from the cerebral cortex of fetal Sprague-Dawley rats (embryonic day 17) as described previously. All experiments are initiated 24 hours after plating. Under these conditions, the cells are not susceptible to glutamate-mediated excitotoxicity. For cytotoxicity studies, cells are rinsed with warm PBS and then placed in minimum essential medium (Invitrogen) containing 5.5 g/L glucose, 10% fetal calf serum, 2 mM L-glutamine, and 100 μM cystine. Oxidative stress is induced by the addition of the glutamate analogue homocysteate (HCA; 5 mM) to the media. HCA is diluted from 100-fold concentrated solutions that are adjusted to pH 7.5. In combination with HCA, neurons are treated with Tubastatin A at the indicated concentrations. Viability is assessed after 24 hours by MTT assay (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) method.

    In VivoDaily treatment of Tubastatin A at 0.5mg/kg inhibits HDAC6 to promote Tregs suppressive activity in mouse models of inflammation and autoimmunity, including multiple forms of experimental colitis and fully major histocompatibility complex (MHC)-incompatible cardiac allograft rejection.
    Animal modelCD45RBhi CD4+ CD25- cells (1 × 106) from WT or HDAC6-/- mice Are injected i.p. into B6/Rag1-/-mice.
    Formulation & DosageSolubilized in DMSO; 0.5 mg/kg; i.p. injection
    References

    J Am Chem Soc. 2010 Aug 11;132(31):10842-6; Mol Cell Biol. 2011 May;31(10):2066-78; PLoS One. 2011;6(12):e28563.


    These protocols are for reference only. InvivoChem does not independently validate these methods.

     

    Tubastatin A HCl

    Comparison of histone and α-tubulin hyperacetylation for TSA, Tubastatin A, and Tubacin. J Am Chem Soc. 2010 Aug 11;132(31):10842-6
     

    Tubastatin A HCl

    HCA oxidative stress assay: neurons were treated with Tubastatin A, with or without addition of HCA. J Am Chem Soc. 2010 Aug 11;132(31):10842-6
     

    Tubastatin A HCl


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