Riviciclib hydrochloride (P276-00)
For research use only.
CAS No. 920113-03-7
Riviciclib hydrochloride (P276-00) is a novel CDK1, CDK4 and CDK9 inhibitor with IC50 of 79 nM, 63 nM and 20 nM, respectively. Riviciclib hydrochloride (P276-00) induces apoptosis. Phase 2/3.
Selleck's Riviciclib hydrochloride (P276-00) has been cited by 4 publications
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Predicted anticancer drugs inhibit the growth of neuroendocrine tumor cells. Multi-tyrosine kinase inhibitors sorafenib, sunitinib, regorafenib and cabozantinib effectively inhibit GOT1 cell growth with IC50 values in the micromolar range. Inhibitors of AKT (MK-2206), HDAC (vorinostat), HSP90 (alvespimycin) and CDK4/9 (P276-00) also inhibited GOT1 cell growth at micromolar concentrations, whereas inhibition of PARP1 (veliparib) had no effect. GOT1 cells were treated with anticancer drugs at various concentrations for 4 days. Cell viability was estimated using AlamarBlue®. Data points are the mean values of three individual experiments carried out in triplicate (n=9). Fitting of curves was done in GraphPad Prism software v6.04 using log (inhibitor) vs response nonlinear fit with variable slope. IC50 was interpolated at Y=50 and bars denote ±s.d.
Mod Pathol, 2016, 29(6):616-29. . Riviciclib hydrochloride (P276-00) purchased from Selleck.
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|Description||Riviciclib hydrochloride (P276-00) is a novel CDK1, CDK4 and CDK9 inhibitor with IC50 of 79 nM, 63 nM and 20 nM, respectively. Riviciclib hydrochloride (P276-00) induces apoptosis. Phase 2/3.|
P276-00 shows 40-fold selectivity toward Cdk4-D1, compared with Cdk2-E. It shows potent antiproliferative effects against various human cancer cell lines, including HCT-116, U2OS, H-460, HL-60, HT-29, SiHa, MCF-7, Colo-205, SW-480, PC-3, Caco2, T-24 with an IC50 ranging from 300 to 800 nmol/L, and is found to be highly selective for cancer cells as compared with normal fibroblast cells. P276-00 can down-regulate cyclin D1 and Cdk4 in an ATP- competitive manner and decrease Cdk4-specific pRb Ser780 phosphorylation. P276-00 also induces apoptosis by actving cellular caspase-3 activity and DNA ladder formation.
|In vivo||P276-00, administered i.p. at 50 mg/kg daily for 20 treatments can significantly induce growth inhibition of murine colon cancer (CA-51). However, in murine lung carcinoma model (Lewis lung), an increased dose of 60 mg/kg (30 mg/kg twice daily) administered every alternate day i.p. for 7 treatments shows significant inhibition in the growth. And it also inhibit the growth of human colon carcinoma HCT-116 xenograft and human non-small cell lung carcinoma H-460 xenograft. Efficacy Studies show its maximum tolerated dose is 78 mg/kg/d.|
Cdk4-D1/Cdk2-E enzyme assay:The Cdk4-D1/Cdk2-E enzyme assay is run in 96-well format using Millipore Multiscreen filtration plates. All assay steps are done in a single filter plate. The filtration wells are prewetted with 100 μL of kinase buffer [50 mmol/L HEPES (pH, 7.5), 10 mmol/L MgCl2, 1 mmol/L EGTA], and then the solution is removed by vacuum. With filter plate on vacuum manifold, 50 μL GST-Rb bound to GSH-Sepharose beads in kinase buffer (0.5 μg GST-Rb/50 μL) is added to each well, and vacuum is applied to the filter plate. About 25 μL of a reaction mix containing ATP (cold + hot) and 4× phosphatase inhibitor mix (40 μmol/L unlabeled ATP, 10 μCi/mL γ32P-ATP, 40 mmol/L h-glycerophosphate, 4 mmol/L DTT, 0.4 mmol/L NaF, 0.4 mmol/L sodium orthovanadate) diluted in kinase buffer is added to each well. The test compound (4×final concentration in kinase buffer) or kinase buffer alone (control) is then added in an additional 25 μL volume. To each well, 50 μL (100 ng) of human Cdk4-D1/Cdk2-E enzyme in kinase buffer is added to initiate the reaction, which is allowed to continue for 30 min at 30°C. When the reaction is completed, vacuum is applied again, and the plate is washed with the TNEN buffer [20 mmol/L Tris (pH, 8.0), 100 mmol/L NaCl, 1 mmol/L EDTA, 0.5% nonidet-P40] thrice; the filter plate is air-dried and is placed in a Multiscreen adapter plate. Packard Microscint-O cocktail (30 μL) is added, and the plate is covered with a Top-Seal A film. Quantitation of 32P-GST-Rb in 96-well filter plates is carried out by Top Count scintillation counter. All compounds are tested initially at 1 μmol/L concentration. Compounds showing more than or equal to 50% inhibition are further profiled for IC50 determination.
|In vitro||DMSO||88 mg/mL (200.77 mM)|
|Water||88 mg/mL (200.77 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
30% propylene glycol, 5% Tween 80, 65% D5W
For best results, use promptly after mixing.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
In vivo Formulation Calculator (Clear solution)
|Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)|
|Dosage||mg/kg||Average weight of animals||g||Dosing volume per animal||ul||Number of animals|
|Step 2: Enter the in vivo formulation ()|
|% DMSO % % Tween 80 % ddH2O|
Working concentration： mg/ml；
Method for preparing DMSO master liquid: ： mg drug pre-dissolved in μL DMSO (Master liquid concentration mg/mL，)
Method for preparing in vivo formulation：Take DMSO master liquid, next addμL PEG300， mix and clarify, next addμL Tween 80，mix and clarify, next add μL ddH2O，mix and clarify.
1.Please make sure the liquid is clear before adding the next solvent.
2.Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT00899054||Completed||Drug: P276-00|Radiation: External beam radiotherapy (EBRT)||Squamous Cell Carcinoma of Head and Neck||Piramal Enterprises Limited||August 2009||Phase 1|Phase 2|
|NCT00898287||Completed||Drug: P276-00|Drug: Gemcitabine||Pancreatic Cancer||Piramal Enterprises Limited||May 2009||Phase 1|Phase 2|
|NCT00547404||Withdrawn||Drug: P276-00||Multiple Myeloma||Piramal Enterprises Limited||December 2008||Phase 1|
|NCT00882063||Completed||Drug: P276-00||Relapsed and/or Refractory Multiple Myeloma||Piramal Enterprises Limited||January 2008||Phase 1|Phase 2|
|NCT00407498||Completed||Drug: P276-00||Neoplasm||Piramal Enterprises Limited||May 2005||Phase 1|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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