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Lapatinib Ditosylate

別名：GW-572016 Ditosylate

Lapatinib Ditosylate is a potent EGFR and ErbB2 inhibitor with IC50 of 10.8 and 9.2 nM in cell-free assays, respectively.

Lapatinib Ditosylate化学構造

CAS No. 388082-77-7

サイズ 価格(税別) 在庫状況
10mM (1mL in DMSO) JPY 29500 国内在庫あり
JPY 22000 国内在庫あり
JPY 40500 国内在庫あり
JPY 100500 国内在庫なし(納期7~10日)

代表番号: 045-509-1970|電子メール：sales@selleck.co.jp
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製品安全説明書

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Lapatinib Ditosylate関連製品

シグナル伝達経路

HER2 Signaling Pathways

HER2シグナル伝達経路

HER2阻害剤の選択性比較

1. "+" indicates inhibitory effect. Increased inhibition is marked by a higher "+" designation. 2. "✔" indicates inhibitory effect, but without specific value.

Cell Data

Cell Lines Assay Type Concentration Incubation Time 活性情報 PMID
NCI-N87 Antitumor assay 20 mg/kg 14 days Antitumor activity against human NCI-N87 cells xenografted in athymic mouse assessed as tumor growth inhibition at 20 mg/kg, po QD for 14 days measured after 19 days 22101132
MCF7 Function assay 10 uM 2 hrs Inhibition of EGFR autophosphorylation at Y1068 in human MCF7 cells expressing HER2delta16 at 10 uM after 2 hrs by Western blotting 24355130
MCF7 Function assay 10 uM 2 hrs Inhibition of EGFR autophosphorylation at Y1068 in human MCF7 cells expressing HER2 at 10 uM after 2 hrs by Western blotting 24355130
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生物活性

製品説明 Lapatinib Ditosylate is a potent EGFR and ErbB2 inhibitor with IC50 of 10.8 and 9.2 nM in cell-free assays, respectively.
Targets
ErbB2 [1]
(Cell-free assay)		 EGFR [1]
(Cell-free assay)		 ErbB4 [1]
(Cell-free assay)
9.2 nM 10.8 nM 367 nM
In Vitro
In vitro Lapatinib Ditosylate weakly inhibits the activity of ErbB4 with IC50 of 367 nM, and displays >300-fold selectivity for EGFR and ErbB2 over other kinases such as c-Src, c-Raf, MEK, ERK, c-Fms, CDK1, CDK2, p38, Tie-2, and VEGFR2. Lapatinib Ditosylate significantly inhibits receptor autophosphorylation of EGFR and ErbB2 in a dose-dependent manner with IC50 of 170 nM and 80 nM, respectively in HN5 cells; as well as 210 nM and 60 nM, respectively in BT474 cells. Unlike OSI-774 and Iressa (ZD1839) which preferentially inhibit the growth of the EGFR-overexpressing cells, Lapatinib Ditosylate inhibits the growth of both EGFR- and ErbB2-overexpressing cells. Lapatinib Ditosylate displays higher inhibitory activity against EGFR- or ErbB2-overexpressing cells with IC50 of 0.09-0.21 μM, compared with cells expressing low levels of EGFR or ErbB2 with IC50 of 3-12 μM, and exhibits ~100-fold selectivity over the normal fibroblast cells. Lapatinib Ditosylate potently inhibits the outgrowth of EGFR-overexpressing HN5 and A-431 cells, as well as ErbB2-overexpressing BT474 and N87 cells, and significantly induces G1 arrest of HN5 cells and apoptosis of BT474 cells, which are associated with inhibition of AKT phosphorylation. [1]
Kinase Assay In vitro kinase assays
The IC50 values for inhibition of enzyme activity are generated by measuring inhibition of phosphorylation of a peptide substrate. The intracellular kinase domains of EGFR and ErbB2 are purified from a baculovirus expression system. EGFR and ErbB2 reactions are performed in 96-well polystyrene round-bottomed plates in a final volume of 45 μL. Reaction mixtures contain 50 mM 4-morpholinepropanesulfonic acid (pH 7.5), 2 mM MnCl2, 10 μM ATP, 1 μCi of [γ33P] ATP/reaction, 50 μM Peptide A [Biotin-(amino hexonoic acid)-EEEEYFELVAKKK-CONH2], 1 mM dithiothreitol, and 1 μL of DMSO containing serial dilutions of Lapatinib beginning at 10 μM. The reaction is initiated by adding the indicated purified type-1 receptor intracellular domain. The amount of enzyme added is 1 pmol/reaction (20 nM). Reactions are terminated after 10 minutes at 23°C by adding 45 μL of 0.5% phosphoric acid in water. The terminated reaction mix (75 μL) is transferred to phosphocellulose filter plates. The plates are filtered and washed three times with 200 μL of 0.5% phosphoric acid. Scintillation cocktail (50 μL) is added to each well, and the assay is quantified by counting in a Packard Topcount. IC50 values are generated from 10-point dose-response curves.
細胞実験 細胞株 HFF, MCF-7, T47D, A-431, HN5, BT474, N87, CaLu-3, HB4a, and HB4a c5.2
濃度 Dissolved in DMSO, final concentrations ~100 μM
反応時間 72 hours
実験の流れ Cells are exposed to various concentrations of Lapatinib for 72 hours. Relative cell number is estimated using methylene blue staining. The absorbance at 620 nm is read in a Spectra microplate reader. Cell death and cell cycle analysis are assessed by propidium iodide staining and antibody detection of incorporated BrdUrd and staining with propidium iodide.
実験結果図 Methods Biomarkers 結果図 PMID
Western blot p-ErbB2 / t-ErbB2 / p-Akt / t-Akt / p-Erk / t-Erk pEGFR / EGFR / p-mTOR / mTOR / PARP / c-PARP 25238247
Growth inhibition assay Cell viability 24947784
In Vivo
In Vivo Oral administration of Lapatinib Ditosylate (~100 mg/kg) twice daily significantly inhibits the growth of BT474 and HN5 xenografts in a dose-dependent manner. [1]
動物実験 動物モデル CD-1 nude female mice implanted s.c. with HN5 cells, and C.B-17 SCID female mice implanted s.c. with BT474 cells
投与量 ~100 mg/kg
投与経路 Orally twice daily
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00455039 Withdrawn
Breast Cancer
University of New Mexico
 July 31 2023 Phase 1|Phase 2
NCT04608409 Active not recruiting
Ovarian Cancer
Frederick R. Ueland M.D.|National Cancer Institute (NCI)|University of Kentucky
 March 17 2021 Phase 1
NCT03075995 Unknown status
Breast Cancer
Sun Yat-sen University
 April 12 2017 Not Applicable
NCT02338245 Completed
Metastatic Breast Cancer
ASLAN Pharmaceuticals
 December 29 2014 Phase 2
NCT02294786 Terminated
Cancer
Novartis Pharmaceuticals|Novartis
 December 17 2014 Phase 2
NCT02158507 Active not recruiting
Metastatic Triple Negative Breast Cancer
University of Alabama at Birmingham|Breast Cancer Research Foundation of Alabama|GlaxoSmithKline|AbbVie
 September 2014 Not Applicable

化学情報

分子量 925.46 化学式

C29H26ClFN4O4S.2C7H8O3S
CAS No. 388082-77-7 SDF Download Lapatinib Ditosylate SDFをダウンロードする
Smiles CC1=CC=C(C=C1)S(=O)(=O)O.CC1=CC=C(C=C1)S(=O)(=O)O.CS(=O)(=O)CCNCC1=CC=C(O1)C2=CC3=C(C=C2)N=CN=C3NC4=CC(=C(C=C4)OCC5=CC(=CC=C5)F)Cl
保管

In vitro
Batch:

DMSO : 185 mg/mL ( (199.9 mM)； 吸湿したDMSOは溶解度を減少させます。新しいDMSOをご使用ください。)

Water : Insoluble

Ethanol : Insoluble

モル濃度計算器

in vivo
Batch:

Add solvents to the product individually and in order.

投与溶液組成計算機
Clear solution
2%DMSO 40% 5% 53%ddH2O
1.25mg/ml (1.35mM) Taking the 1 mL working solution as an example, add 20 μL 62.5 mg/ml clear DMSO stock solution to 400 μL PEG300, mix evenly to clarify it; add 50 μL Tween80 to the above system, mix evenly to clarify it; then continue to add 530 μL ddH2O to make it clear. Volume up to 1 mL. The mixed solution should be used immediately for optimal results. 

実験計算

モル濃度計算器

質量 濃度 体積 分子量

投与溶液組成計算機(クリア溶液)

ステップ１：実験データを入力してください。（実験操作によるロスを考慮し、動物数を1匹分多くして計算・調製することを推奨します）

mg/kg g μL 匹

ステップ２：投与溶媒の組成を入力してください。（ロット毎に適した溶解組成が異なる場合があります。詳細については弊社までお問い合わせください）

% DMSO % % Tween 80 % ddH2O
%DMSO %

計算結果：

投与溶媒濃度： mg/ml;

DMSOストック溶液調製方法： mg 試薬を μL DMSOに溶解する（濃度 mg/mL, 注：濃度が当該ロットのDMSO溶解度を超える場合はご連絡ください。 )

投与溶媒調製方法：Take μL DMSOストック溶液に μL PEG300，を加え、完全溶解後μL Tween 80，を加えて完全溶解させた後 μL ddH2O，を加え完全に溶解させます。

投与溶媒調製方法：μL DMSOストック溶液に μL Corn oil，を加え、完全溶解。

注意：１.ストック溶液に沈殿、混濁などがないことをご確認ください；
２.順番通りに溶剤を加えてください。次のステップに進む前に溶液に沈殿、混濁などがないことを確認してから加えてください。ボルテックス、ソニケーション、水浴加熱など物理的な方法で溶解を早めることは可能です。

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Handling Instructions

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よくある質問（FAQ）

質問1:
If I need to use S1028 for treating tumor-bearing mice with injection, how could I prepare the solution?

回答
S1028 Lapatinib Ditosylate can be dissolved in 2% DMSO/30% PEG 300/ddH2O at 10 mg/ml as clear solution.

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