Catalog No.S2679 Synonyms: NSC 649890 HCl
Molecular Weight(MW): 438.3
Flavopiridol HCl competes with ATP to inhibit CDKs including CDK1, CDK2, CDK4 and CDK6 with IC50 of ~ 40 nM in cell-free assays. It is 7.5-fold more selective for CDK1/2/4/6 than CDK7. Flavopiridol is initially found to inhibit EGFR and PKA. Phase 1/2.
Cited by 11 Publications
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(C) In vivo treatment of Tg:Pomc-Pttg;Pomc-eGFP embryos with small-molecule CDK inhibitors (50μM) or 0.2% DMSO as control from 18 to 40 hpf. One hundred to one hundred fifty embryos were treated with each compound. Representative images of live embryos are shown with gross morphology (Right) and pituitary Pomc-GFP–positive cells at higher magnification (Left) at 40 hpf. Embryos exposed to flavopiridol developed early developmental defect before pituitary POMC cell ontogeny occurs. (D) Relative expression of pituitary Pomc-eGFP fluorescence analyzed using Volocity 5.2 software (Improvision; mean ± SE of relative expression, n = 7). (E) R-roscovitine specifically suppresses expansion of pituitary POMC cells overexpressing zPttg from 18 to 48 hpf. Double transgenic Tg:Pomc-Pttg;Prl-RFP embryos were generated by breeding Tg:Pomc-Pttg fish with a previously generated PRL-RFP transgenic line, in which RFP was targeted to pituitary lactotrophs by a zebrafish Prolactin promoter (34). Representative fluorescent microscopy of pituitary POMC-eGFP (a and b) and PRL-RFP (c and d) expression in live Tg:Pomc-Pttg; Pomc-eGFP and Tg:Pomc-Pttg;Prl-RFP embryos treated with 0.2% DMSO (a and c) or 50 μM R-roscovitine (b and d). (F) Relative expression of pituitary POMC-eGFP or PRL-RFP fluorescence were analyzed (mean ± SE of relative expression; n = 10). Results represent one of three similar experiments;*P < 0.02 and **P < 0.000005. (Scale bar, 50 μm.)
PNAS 2011 108, 8417. Flavopiridol HCl purchased from Selleck.
Comparative efficacy of anticancer therapies (Flavopiridol, vincristine, daunorubicin, et al.) in NMC vs non-NMC cell lines. Mean IC50 (± s.e.m.) of the indicated agents in three NMC (PER-403, PER-624, and PER-704) and two non-NMC cell lines (PER-535 and SAOS2), ***P<0.001, unpaired t-test, corrected for multiple testing.
Br J Cancer 2014 110(5), 1189-98. Flavopiridol HCl purchased from Selleck.
RPMI-8226 cells were treated with the indicated CDK inhibitors for 8 hours. Western blots are shown. The following drug concentrations were used: SLM6 at 250 nM, flavopiridol at 250 nM, roscovitine at 5 uM, purvalanol A at 10 uM, and alsterpaullone at 5 uM.
Mol Cancer Ther 2012 11(11), 2321-2330. Flavopiridol HCl purchased from Selleck.
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Choose Selective CDK Inhibitors
|Description||Flavopiridol HCl competes with ATP to inhibit CDKs including CDK1, CDK2, CDK4 and CDK6 with IC50 of ~ 40 nM in cell-free assays. It is 7.5-fold more selective for CDK1/2/4/6 than CDK7. Flavopiridol is initially found to inhibit EGFR and PKA. Phase 1/2.|
Flavopiridol is initially found to inhibit the epidermal growth factor receptor and protein kinase A (IC50 = 21 and 122 μM). Flavopiridol is later shown to inhibit cell proliferation, at more physiologically relevant concentrations (IC50 = 66 nM) when Flavopiridol is tested in the National Cancer Institute Development Therapeutics Program panel of 60 human tumor cell lines.  Flavopiridol induces G1 arrest with inhibition of CDK2 and CDK4 in human breast carcinoma cells in a time and concentration dependent manner.  Short time treatment of Flavopiridol (~12 hours) induce apoptosis in hematopoietic cell lines including SUDHL4, SUDHL6 (B-cell lines), Jurkat and MOLT4 (T-cell lines ), and HL60 (myeloid).  In the clonogenic assay, Flavopiridol functions as a highly potent cytotoxic compound with a mean IC70 with 8 ng/mL in 23 human tumor models.  A recent study shows Flavopiridol treatment induces a substantial AKT-Ser473 phosphorylation in human glioblastoma T98G cell line. 
|In vivo||At the maximal tolerated dose of 10 mg/kg/day administered p.o. on days 1-4 and 7-11, Flavopiridol effects tumor regression in PRXF1337 and tumor stasis lasting for 4 weeks in PRXF1369.  After treatment with 7.5 mg/kg Flavopiridol bolus intravenous (IV) or intraperitoneal on each of 5 consecutive days, 11 out of 12 advanced stage subcutaneous (s.c.) human HL-60 xenografts undergo complete regressions, and animals remain disease-free several months after one course of Flavopiridol treatment. SUDHL-4 s.c. lymphomas treated with flavopiridol at 7.5 mg/kg bolus IV for 5 days undergo either major (two out of eight mice) or complete (four out of eight mice) regression, with two animals remaining disease-free for more than 60 days. The overall growth delay is 73.2%. Daily IV or IP administration of ﬂavopiridol results in peak plasma levels of about 7 µM, followed by a progressive decline to approximately 100 nM in 8 hours.|
Recombinant CDKs Kinase Reactions:CDKs activities are determined in microtiter plates as follows. Forty μg Gst-Rb are mixed with different amounts of Flavopiridol and unlabeled ATP. Reactions are then started by the addition of an ammonium sulfate cut of the S100 fraction obtained from insect cells expressing recombinant human CDKs. The final reaction conditions are 10 mM MgCl2, 50 mM Tris-HCl (pH 7.5), and 1 mM DTT. The final concentration of ATP is adjusted accordingly. Radiolabeled ATP is used as a phosphoryl donor. The reaction is carried out for 2.5 minutes at 30 °C after addition of enzyme and then terminated with the addition of EDTA. The Gst-Rb is then captured with glutathione-Sepharose and the incorporated radioactivity is determined by liquid scintillation counting.
|Animal Research: ||
-  Senderowicz AM, Oncologist, 2002, 7 Suppl 3:12-9.
-  Carlson BA, et al, Cancer Res, 1996, 56(13), 2973-2978.
-  Parker BW, et al, Blood, 1998, 91(2), 458-465.
|In vitro||DMSO||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):
2% DMSO+30% PEG 300+ddH2O
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.
|Synonyms||NSC 649890 HCl|
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT00445341||Completed||Lymphoma||National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC)||November 27 2006||Phase 1|Phase 2|
|NCT00094978||Terminated||Carcinoma Small Cell|Carcinoma Non-Small-Cell Lung|Esophageal Neoplasms|Mesothelioma||National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC)||October 25 2004||Phase 1|
|NCT00083122||Completed||Recurrent Ovarian Epithelial Cancer|Recurrent Primary Peritoneal Cavity Cancer|Stage IIIA Ovarian Epithelial Cancer|Stage IIIA Primary Peritoneal Cavity Cancer|Stage IIIB Ovarian Epithelial Cancer|Stage IIIB Primary Peritoneal Cavity Cancer|Stage IIIC Ovarian Epithelial Cancer|Stage IIIC Primary Peritoneal Cavity Cancer|Stage IV Ovarian Epithelial Cancer|Stage IV Primary Peritoneal Cavity Cancer||National Cancer Institute (NCI)||April 2004||Phase 2|
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