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    R547 (Ro 4584820)
    R547 (Ro 4584820)

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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 #: V1559
    CAS #: 741713-40-6Purity ≥98%

    Description: R547 (R-547; Ro4584820; R 547; Ro-4584820) is a potent, selective and ATP-competitive inhibitor of CDK1/2/4 with potential antitumor activity. It inhibits CDK1/2/4 with Ki values of 2 nM/3 nM/1 nM. R547 is less potent or inactive against CDK7 and GSK3α/β as well as other kinases. R547 inhibited the proliferation of tumor cell lines and is active in all 19 cell lines tested irrespective of tissue of origin, multidrug resistance (MDR), p53, or retinoblastoma status. R547 possessing both 5-and 6-fluoro substitution culminated in an Inhibitor with low, single-digit nanomolar potency against the CDKs and excellent cellular potency (IC50=0.08 μM,HCT116 cell line). 

    References: Mol Cancer Ther. 2006 Nov;5(11):2644-58; J Med Chem. 2006 Nov 2;49(22):6549-60.

    Related CAS #: 869369-26-6 (mesylate)   741713-40-6 (free base)  

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    Molecular Weight (MW)441.45 
    FormulaC18H21F2N5O4S 
    CAS No.741713-40-6 
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 60 mg/mL (135.9 mM) 
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    Solubility (In vivo)1% hydroxyethyl cellulose+0.2% Tween 80: 30 mg/mL  
    SynonymsR547; Ro4584820; R 547; Ro-4584820; R-547; Ro 4584820


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    In Vitro

    In vitro activity: R547 identified as a diaminopyrimidine compound, which is a potent and selective ATP-competitive CDK inhibitor. R547 effectively inhibits CDK1/cyclinB, CDK2/cyclinE, and CDK4/cyclinD1(Ki=1-3nM) and is inactive(Ki>5,000nM) against a panel of >120 unrelated kinases. R547 effectively inhibits the proliferation of tumor cell lines independent of multidrug resistant status, histologic type, retinoblastoma protein, or p53 status, with IC50s<0.60 μM. R547 reduces phosphorylation of the cellular retinoblastoma protein at specific CDK phosphorylation sites at the same concentrations that induced cell cycle arrest, suggesting a potential pharmaco dynamics marker for clinical use. R547 inhibits the proliferation of tumor cell lines and is active in all 19 cell lines tested irrespective of tissue of origin, multidrug resistance (MDR), p53, or retinoblastoma status. R547 possessing both 5-and 6-fluoro substitution culminated in an Inhibitor with low, single-digit nanomolar potency against the CDKs(Ki=0.001,0.003,and 0.001 μM for CDK1,CDK2, and CDK4,respectively) and excellent cellular potency (IC50=0.08 μM,HCT116 cell line).


    Kinase Assay: R547 is a potent ATP-competitive inhibitor of CDK1/2/4 with Ki of 2 nM/3 nM/1 nM.


    Cell Assay: R547 effectively inhibits CDK1/cyclinB, CDK2/cyclinE, and CDK4/cyclinD1(Ki=1-3nM) and is inactive(Ki>5,000nM) against a panel of >120 unrelated kinases. R547 effectively inhibits the proliferation of tumor cell lines independent of multidrug resistant status, histologic type, retinoblastoma protein, or p53 status, with IC50s<0.60 μM. R547 reduces phosphorylation of the cellular retinoblastoma protein at specific CDK phosphorylation sites at the same concentrations that induced cell cycle arrest, suggesting a potential pharmaco dynamics marker for clinical use. R547 inhibits the proliferation of tumor cell lines and is active in all 19 cell lines tested irrespective of tissue of origin, multidrug resistance (MDR), p53, or retinoblastoma status. R547 possessing both 5-and 6-fluoro substitution culminated in an Inhibitor with low, single-digit nanomolar potency against the CDKs(Ki=0.001,0.003,and 0.001 μM for CDK1,CDK2, and CDK4,respectively) and excellent cellular potency (IC50=0.08 μM,HCT116 cell line). 

    In VivoR547 administered with oral and i.v. dosing in multiple established human tumor significantly inhibits tumor activity(P < 0.01). R547 administered orally at dose of 40 mg/kg daily in colon, lung, breast, prostate, and melanoma human tumor xenograft models shows significant TGI (79-99%). R547 is equally efficacious (TGI, 61-95%) when dosed with 40 mg/kg i.v. once weekly. These doses of R547 are not toxic and did not result in body weight loss. R547 does not show signs of overt toxicity during the course of the 3-week study and any gross pathology at necropsies done at the end of the studies. R547 inhibits tumor growth up to 95% in the HCT116 human colorectal tumor xenograft model in nude mice . R547 causes significant TGI in all of the models tested when dosed orally and i.v. at or below the maximum tolerated dose. R547 inhibits phosphorylation of retinoblastoma protein in tumors at the efficacious exposures in tumor xenograft models, providing a pharmacodynamic biomarker for clinical use. R547 reported here suggests that this is a promising molecule for evaluation in the treatment of solid tumors. 
    Animal modelFemale nude mice bearing established HCT116 human colorectal xenografts with a mean starting volume of about 100 mm3 
    Formulation & DosagesSspended in 1% Klucel LF in water with 0.1% Tween 80; 25 ,50,75 mg/kg; p.o. 
    References

    Mol Cancer Ther. 2006 Nov;5(11):2644-58; J Med Chem. 2006 Nov 2;49(22):6549-60. 


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

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