KW-2449

製品コードS2158

KW-2449化学構造

分子量(MW):332.4

KW-2449 is a multiple-targeted inhibitor, mostly for Flt3 with IC50 of 6.6 nM, modestly potent to FGFR1, Bcr-Abl and Aurora A; little effect on PDGFRβ, IGF-1R, EGFR. Phase 1.

サイズ 価格(税別)  
JPY 19920.00
JPY 14940.00
JPY 61420.00

カスタマーフィードバック(1)

  • Western blot analysis of p-histone and histone. 0-10μM KW2449 was added.

     

     

    Dr. Zhang of Tianjin Medical University. KW-2449 purchased from Selleck.

製品安全説明書

FLT3阻害剤の選択性比較

生物活性

製品説明 KW-2449 is a multiple-targeted inhibitor, mostly for Flt3 with IC50 of 6.6 nM, modestly potent to FGFR1, Bcr-Abl and Aurora A; little effect on PDGFRβ, IGF-1R, EGFR. Phase 1.
特性 Investigated as a FLT3 inhibitor in clinical trials, with others in early development.
ターゲット
FLT3 (D835Y) [1]
(Cell-free assay)
Abl (T315I) [1]
(Cell-free assay)
FLT3 [1]
(Cell-free assay)
Abl [1]
(Cell-free assay)
FGFR1 [1]
(Cell-free assay)
1 nM 4 nM 6.6 nM 14 nM 36 nM
体外試験

KW-2449, a multikinase inhibitor of FLT3, ABL, ABL-T315I, and Aurora kinase, is under investigation to treat leukemia patients. KW-2449 shows the potent growth inhibitory effects on leukemia cells with FLT3 mutations by inhibition of the FLT3 kinase, resulting in the down-regulation of phosphorylated-FLT3/STAT5, G1 arrest, and apoptosis. Oral administration of KW-2449 shows dose-dependent and significant tumor growth inhibition in FLT3-mutated xenograft model with minimum bone marrow suppression. In FLT3 wild-type human leukemia, KW-2449 induces the reduction of phosphorylated histone H3, G2/M arrest, and apoptosis. In Imatinib-resistant leukemia, KW-2449 contributes to release of the resistance by the simultaneous down-regulation of BCR/ABL and Aurora kinases. The inhibitory activity of KW-2449 is not affected by the presence of human plasma protein, such as α1-acid glycoprotein. KW-2449 has potent growth inhibitory activity against various types of leukemia by several mechanisms of action. KW-2449 has significant activity and warrants clinical study in leukemia patients with FLT3 mutations as well as Imatinib-resistant mutations. Phosphorylation levels of FLT3 and STAT5 are decreased by KW-2449 in a dose-dependent manner. In addition, it potently inhibits ABL-T315I, which is associated with IM resistance, with IC50 of 4 nM. On the other hand, KW-2449 has little effect on PDGFRβ, IGF-1R, EGFR, and various serine/threonine kinases even at a concentration of 1 μM. KW-2449 has the potent growth inhibitory activities against not only FLT3/ITD-expressing leukemia cells but also FLT3/KDM-activated and wild-type FLT3-overexpressing leukemia cells. In accordance with growth inhibitory effect, KW-2449 suppresses the phosphorylations of FLT3 (P-FLT3) and its downstream molecule phospho-STAT5 (P-STAT5) in MOLM-13 cells in a dose-dependent manner. Furthermore, KW-2449 increases the percentage of cells in the G1 phase of the cell cycle and reciprocally reduces the percentage of cells in the S phase, resulting in the increase of apoptotic cell population. KW-2449 can dephosphorylate constitutively active WT-FLT3 kinase but not inhibit the proliferation of leukemia cells if they are not mainly addicted to FLT3 the kinase. [1] KW-2449 is rapidly absorbed and converted to a major metabolite M1.Preclinical studies reveal that KW-2449 is converted by monoamine oxidase-B (MAO-B) and aldehyde oxidase into its major metabolite M1.KW-2449 mediates cytotoxicity thru inhibition of FLT3/ITD.KW-2449 is a direct inhibitor of FLT3 and induces inhibition of its downstream target STAT5. [2] KW2449 interacts synergistically with HDACIs to induce apoptosis in Ph+ CML cells in a time- and concentration-dependent manner. KW2449 synergistically enhances the lethality of vorinostat/SNDX275 in CML cells.KW-2449 regimens are active against additional IM-resistant Bcr/Abl+ leukemia cells. KW2449 moderately reduces phosphorylation of histone H3, an indicator of Aurora B activity, in nocodozole-treated K562 cells. [3]

体内試験 In the MOLM-13 tumor xenograft model, oral administration of KW-2449 for 14 days shows a potent and significant antitumor effect in a dose-dependent manner. [1]

お薦めの試験操作(参考用のみ)

キナーゼ試験:[2]
+ 展開

FLT3 phosphorylation:

Leukemia cells are washed in phosphate-buffered saline (PBS), then lysed by resuspending the cells in lysis buffer (20 mM Tris pH 7.4, 100 mM NaCl, 1% Igepal, 1 mM EDTA, 2 mM NaVO4, plus Complete protease inhibitor KW-2449 for 30 minutes while rocking. The extract is clarified by centrifugation at 1.6 × 104 g and the supernatant is assayed for protein (Bio-Rad). A 50-μg aliquot is removed as a whole-cell lysate for analysis of STAT5, and the remainder is used for immunoprecipitation with anti-FLT3. Anti-FLT3 antibody is added to the extract for overnight incubation, then protein A sepharose is added for 2 additional hours. Separate sodium dodecyl sulfate–polyacrylamide electrophoresis (SDS-PAGE) gels for whole-cell lysate and immunoprecipates are run in parallel. After transfer to Immobilon membranes, immunoblotting is performed with antiphosphotyrosine antibody (4G10) to detect phosphorylated FLT3 or, for the whole-cell lysate gels, with a rat monoclonal antibody against phosphorylated STAT5 (residue Y694) then stripped and reprobed with anti-FLT3 antibody to measure total FLT3. Proteins are visualized using chemiluminescence, exposed on Kodak BioMax XAR film, developed, and scanned using a Bio-Rad GS800 densitometer. The concentration of KW-2449 for which the phosphorylation of FLT3 or STAT5 is inhibited to 50% of its baseline (IC50) is determined using linear regression analysis of the dose response curves. For direct analysis of FLT3 and STAT5 in circulating blasts, peripheral blood is collected in heparinized tubes and promptly chilled on ice. Samples are centrifuged for 10 minutes at 900 g, at 4 °C. The plasma is removed and stored frozen at −80 °C. The buffy coat is carefully transferred to ice-cold PBS, layered onto chilled Ficoll-Hypaque, and centrifuged for 5 minutes at 600 g, at 4 °C. All subsequent steps are carried out at 4 °C. Mononuclear cells are collected and washed rapidly once in red blood cell lysis buffer (0.155 M NH4Cl, 0.01 M KHCO3, 0.1 mM EDTA), then washed once in PBS. Cells are then lysed as described for FLT3 and STAT5 analysis.
細胞試験: [1]
+ 展開
  • 細胞株: MOLM-13 and RS4;11 cells
  • 濃度: 33nM, 75nM, 0.1μM, 0.3μM and 0.15μM
  • 反応時間: 24, 48, and 72 hours
  • 実験の流れ: Cell viability is determined by the sodium 3′-[1-(phenylaminocarbonyl)-3, 4-tetrazolium]-bis (4-methoxy-6-nitro) benzene sulfonic acid hydrate assay after incubation with or without KW-2449 for 72 hours at 37 °C. The number of viable cells is determined using the Cell Proliferation Kit II. For cell-cycle analysis, MOLM-13 and RS4;11 cells are treated with KW-2449. After 24, 48, and 72 hours of incubation at 37 °C, DNA contents are analyzed. Cell cycle distribution of K562, TCC-Y, and TCC/Ysr is analyzed 24 hours after treatment with KW-2449 or imatinib.
    (参考用のみ)
動物試験:[3]
+ 展開
  • 動物モデル: CBySmn.CB17-Prkdsscid/J (BALB/C) mice are injected with BV173/E255K/Luc cl4 cells.
  • 製剤: Dissolved in 0.5% methylcellulose 400 solution.
  • 投薬量: 32 mg/kg/day, 5 days/week
  • 投与方法: Orally (p.o.) administered
    (参考用のみ)

溶解度 (25°C)

体外 DMSO 67 mg/mL (201.56 mM)
Ethanol 67 mg/mL (201.56 mM)
Water Insoluble
体内 左から(NMPから)右の順に溶剤を製品に加えます(文献ではなく、Selleckの実験によるデータ):
0.5% methylcellulose
混合させたのち直ちに使用することを推奨します。
30 mg/mL

* 溶解度測定はSelleck技術部門によって行われており、その他文献に示されている溶解度と差異がある可能性がありますが、同一ロットの生産工程で起きる正常な現象ですからご安心ください。

化学情報

分子量 332.4
化学式

C20H20N4O

CAS No. 1000669-72-6
保管
in solvent
別名 N/A

便利ツール

モル濃度計算器

モル濃度計算器

求めたい質量、体積または濃度を計算してください。

質量 (g) = 濃度 (mol/L) x 体積 (L) x 分子量 (g/mol)

モル濃度計算器方程式

  • 質量
    濃度
    体積
    分子量

*貯蔵液を準備するとき、常に、オンであるとわかる製品のバッチに特有の分子量を使って、を通してラベルとMSDS/COA(製品ページで利用可能な)。

希釈計算器

希釈計算器

貯蔵液を準備するために必要な希釈率を計算してください。Selleck希釈計算器は、以下の方程式に基づきます:

開始濃度 x 開始体積 = 最終濃度 x 最終体積

希釈の計算式

この方程式は、一般に略語を使われます:C1V1 = C2V2 ( 入力 出力 )

  • C1
    V1
    C2
    V2

常に貯蔵液を準備するとき、小びんラベルとMSDS/COA(オンラインで利用できる)で見つかる製品のバッチに特有の分子量を使ってください。

連続希釈計算器方程式

  • 連続希釈剤

  • 計算結果

  • C1=C0/X C1: LOG(C1):
    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
    C5=C4/X C5: LOG(C5):
    C6=C5/X C6: LOG(C6):
    C7=C6/X C7: LOG(C7):
    C8=C7/X C8: LOG(C8):
分子量計算器

分子量计算器

そのモル質量と元素組成を計算するために、合成物の化学式を入力してください:

総分子量:g/mol

チップス: 化学式は大文字と小文字の区別ができます。C10H16N2O2 c10h16n2o2

モル濃度計算器

質量 濃度 体積 分子量

臨床試験

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00779480 Terminated Acute Myelogenous Leukemia (AML) Kyowa Hakko Kirin Pharma Inc.|Kyowa Kirin Pharmaceutical Development Inc. January 2009 Phase 1
NCT00346632 Terminated Acute Myelogenous Leukemia|Acute Lymphoblastic Leukemia|Myelodysplastic Syndromes|Chronic Myelogenous Leukemia Kyowa Kirin Pharmaceutical Development Inc. June 2006 Phase 1

技術サポート

ストックの作り方、阻害剤の保管方法、細胞実験や動物実験の際に注意すべき点など、製品を取扱う時に問い合わせが多かった質問に対しては取扱説明書でお答えしています。

Handling Instructions

他に質問がある場合は、お気軽にお問い合わせください。

  • * 必須

FLT3シグナル伝達経路

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