Flavopiridol (Alvocidib)

製品コードS1230 バッチS123010

印刷

化学情報

Chemical Structure Synonyms NSC 649890, HMR-1275, L86-8275 Storage
(From the date of receipt)		 3 years -20°C powder
1 years -80°C in solvent
化学式

C21H20ClNO5
分子量 401.84 CAS No. 146426-40-6
Solubility (25°C)* 体外 DMSO 80 mg/mL (199.08 mM)
Water Insoluble
Ethanol Insoluble
体内 （毎回新しく調製した物を用意してください）
Clear solution
5%DMSO 30%PEG300 65%ddH2O
2.5mg/ml Taking the 1 mL working solution as an example, add 50 μL of 50 mg/ml clarified DMSO stock solution to 300 μL of PEG 300, mix evenly to clarify it; then continue to add 650 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* 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.

溶剤液（一定の濃度）を調合する

生物活性

製品説明 Flavopiridol (Alvocidib) competes with ATP to inhibit CDKs including CDK1, CDK2, CDK4, CDK6, and CDK9 with IC50 values in the 20-100 nM range. It is more selective for CDK1, 2, 4, 6, 9 versus CDK7. Flavopiridol is initially found to inhibit EGFR and PKA. Flavopiridol induces autophagy and ER stress. Flavopiridol blocks HIV-1 replication. Phase 1/2.
in vitro Flavopiridol displays less activity against unrelated kinases such as MAP, PAK, PKC, and EGFR with IC50 of >14 μM. Flavopiridol significantly inhibits the colony growth of HCT116, A2780, PC3, and Mia PaCa-2 cells with IC50 of 13 nM, 15 nM, 10 nM and 36 nM, respecitively. [1] Flavopiridol also potently inhibits the activity of Glycogen synthase kinase-3 (GSK-3) with an IC50 of 280 nm. [2] Compared with other CDKs, Flavopiridol inhibits the activity of CDK7 less potently with IC50 of 875 nM. Flavopiridol (0.5 μM) inhibits both pSer807/811 Rb and pThr199 NPM, whereas mild changes are observed at pThr821 Rb. Flavopiridol also decreases the overall RNA polymerase II level, as well as the phosphorylation of RNA polymerase II on the CTD repeats at Ser2 Ser5. [3] As a broad spectrum CDK inhibitor, Flavopiridol can inhibit cell cycle progression in either G1 or G2. Flavopiridol (0.3 μM) induces G1 arrest in either MCF-7 or MDA-MB-468 cells by inhibition of the CDK4 or CDK2 kinase activity. [4] Flavopiridol exhibits potent cytotoxicity against a wide variety of tumor cell lines with IC50 values ranging form 16 nM for LNCAP to 130 nM for K562. [5]
in vivo Administration of Flavopiridol at 7.5 mg/kg for 7 days displays slight antitumor activity against P388 murine leukemia, resulting in %T/C value of 110, and active against the human A2780 ovarian carcinoma implanted sc in nude mice, producing 1.5 log cell kill (LCK). [5] Flavopiridol treatment at 1-2.5 mg/kg for 10 days significantly suppresses collagen-induced arthritis in mice in a dose-dependent manner, by inhibiting synovial hyperplasia and joint destruction, whereas serum concentrations of anti-collagen type II (CII) Abs and proliferative responses to CII are maintained. [6] In the p21-intact Hct116 xenografts in nude mice, administration of CPT-11 (100 mg/kg) followed by Flavopiridol (3 mg/kg) 7 and 16 hours later significantly inhibits tumor regression by 86% and 82%, respectively, displaying >2 fold inhibition compared with CPT-11 alone by 40 %. The combination produces ~30% complete response rate (CR) in contrast to CPT-11 alone where no CR is found. [7]
特徴 First CDK inhibitor to be used in human clinical trials.

プロトコル(参考用のみ)

キナーゼアッセイ CDK kinase assay
For CDK1/cyclin B1 kinase assay, kinase reactions consist of 100 ng of baculovirus expressed GST-CDK1/cyclin B1 (human) complex, 1 μg histone HI, 0.2 μCi [γ-33P]ATP, 25 μM ATP in 50 μL kinase buffer (50 mM Tris, pH 8.0, 10 mM MgCl2, 1 mM EGTA, 0.5 mM DTT). For CDK2/cyclin E kinase assay, kinase reactions consist of 5 ng of baculovirus expressed GST-CDK2/cyclin E (human) complex, 0.5 μg GST-RB fusion protein (amino acids 776-928 of retinoblastoma protein), 0.2 μCi [γ-33P]ATP, 25 μM ATP in 50 μL kinase buffer (50 mM Hepes, pH 8.0, 10 mM MgCl2, 1 mM EGTA, 2 mM DTT). For CDK4/cyclin D1 kinase assay, kinase reactions consist of 150 ng of baculovirus expressed GST-CDK4/cyclin D1 (human), 280 ng of Stag-cyclin D1, 0.5 μg GST-RB fusion protein (amino acids 776-928 of retinoblastoma protein), 0.2 μCi [γ-33P]ATP, 25 μM ATP in 50 μL kinase buffer (50 mM Hepes, pH 8.0, 10 mM MgCl2, 1 mM EGTA, 2 mM DTT). Reactions are incubated for 45 minutes for CDK1 and CDK2, or 1 hour for CDK4 at 30 °C and stopped by the addition of cold trichloroacetic acid (TCA) to a final concentration 15%. TCA precipitates are collected onto GF/C unifilter plates using a Filtermate universal harvester and the filters are quantitated using a TopCount 96-well liquid scintillation counter. Flavopiridol is dissolved at 10 mM in dimethylformamide (DMF) and evaluated at six concentrations, each in triplicate. The final concentration of DMF in the assay = 2%. IC50 values are derived by nonlinear regression analysis and have a coefficient of variance = 16%. To assay Flavopiridol activity on CDK6, a filter-binding assay is established. The following are combined in the reaction mixture: 2 μL of CDK6 (0.7 mg/μL), 5 μL of histone H1 (6 mg/mL), 14 μL of kinase buffer (60 mM β-glycerophosphate, 30 mM p-nitrophenyl phosphate, 25 mM MOPS (pH 7.0), 5 mM EGTA, 15 mM MgCl2, 1 mM DTT, 0.1 mM Na-vanadate), 3 μL of increasing concentrations of Flavopiridol diluted in 50% DMSO, and 6 μL of 33P-ATP (1 mCi/mL) in nonradioactive ATP at 90 μM concentration (final concentration: 15 μM). The assay is initiated by the addition of 33P-ATP. The reaction is incubated for 20 minutes at 30°C. A 25 μL aliquot of the supernatant is then spotted onto Whatman P81 phosphocellulose paper. Filters are washed 5 times with 1% phosphoric acid solution. Wet filters are counted in the presence of 1 mL of scintillation fluid. Cdk9 activity is measured using 50 nM of recombinant Cdk9/cyclin T in 50 mM HEPES pH 7.5, 10 mM MgCl2, 1 mM DTT, 3 μM Na3VO4, 150 μM RNA polymerase CDT peptide and 80 μM ATP. Cdk7 assay is performed in the same buffer using 37 nM of purified kinase in the presence of 200 μM ATP and 10 μM myelin binding protein as a substrate. The potency of Flavopiridol toward CDK9 and CDK7 is determined using either a strong anion exchanger (Dowex 1-X8 resin, formate form)-based assay or a scintillation proximity assay. IC50 values are calculated from the dose-response curves.
細胞アッセイ 細胞株 MCF-7, LNCAP, PC3, HCT116, CACO-2, A549, HL60, K562 cells and et al.
濃度 Dissolved in DMSO, final concentrations ~10 μM
反応時間 72 hours
実験の流れ

Cells are exposed to various concentrations of Flavopiridol for 72 hours at which time the tetrazolium dye, MTS in combination with phenazine methosulfate, is added. After 3 hours, the absorbency is measured at 492 nm, which is proportional to the number of viable cells. The results are expressed as IC50 values. For cell Cycle analysis, cells are fixed in paraformaldehyde and ethanol, washed, resuspended in staining solution of TdT enzyme and FITC-dUTP, washed, stained with PI following RNase treatment, and then analyzed by flow cytometry.
動物実験 動物モデル Female Balb/c×DBA/2J F1 mice inoculated ip with P388 ascites leukemic cells, and Balb/c nu/nu nude mice subcutaneous implanted with A2780, Br-cycE, or A431 cells
投薬量 ~7.5 mg/kg/day
投与方法 Injection i.p.

カスタマーフィードバック

Data from [PNAS, 2011, 108, 8417]

Data from [Data independently produced by , , Science, 2018, 11(530), doi: 10.1126/scisignal.aai8669]

Data from [Data independently produced by , , Cancer Res, 2016, 76(5):1158-69]

Selleckの高級品が、幾つかの出版された研究調査結果（以下を含む）で使われた：

Mapping nucleosome-resolution chromatin organization and enhancer-promoter loops in plants using Micro-C-XL [ Nat Commun, 2024, 15(1):35] PubMed: 38167349
Monoallelically expressed noncoding RNAs form nucleolar territories on NOR-containing chromosomes and regulate rRNA expression [ Elife, 2024, 13e80684] PubMed: 38240312
Regulation of hypothalamic reactive oxygen species and feeding behavior by phosphorylation of the beta 2 thyroid hormone receptor isoform [ Sci Rep, 2024, 14(1):7200] PubMed: 38531895
APOBEC3B regulates R-loops and promotes transcription-associated mutagenesis in cancer [ Nat Genet, 2023, 55(10):1721-1734] PubMed: 37735199
APOBEC3B regulates R-loops and promotes transcription-associated mutagenesis in cancer [ Nat Genet, 2023, 55(10):1721-1734] PubMed: 37735199
Sirtuin 6 is required for the integrated stress response and resistance to inhibition of transcriptional cyclin-dependent kinases [ Sci Transl Med, 2023, 15(694):eabn9674] PubMed: 37134154
Excessive transcription-replication conflicts are a vulnerability of BRCA1-mutant cancers [ Nucleic Acids Res, 2023, gkad172] PubMed: 36928661
RNF8 ubiquitylation of XRN2 facilitates R-loop resolution and restrains genomic instability in BRCA1 mutant cells [ Nucleic Acids Res, 2023, 51(19):10484-10505] PubMed: 37697435
RNF8 ubiquitylation of XRN2 facilitates R-loop resolution and restrains genomic instability in BRCA1 mutant cells [ Nucleic Acids Res, 2023, 51(19):10484-10505] PubMed: 37697435
Excessive transcription-replication conflicts are a vulnerability of BRCA1-mutant cancers [ Nucleic Acids Research, 2023, 4341–4362] PubMed: None

長期の保管のために-20°Cの下で製品を保ってください。

人間や獣医の診断であるか治療的な使用のためにでない。

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