Lapatinib Ditosylate

Katalog-Nr.S1028 Charge:S102812

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Technische Daten

Formel

C29H26ClFN4O4S.2C7H8O3S
Molekulargewicht 925.46 CAS-Nr. 388082-77-7
Löslichkeit (25°C)* In vitro DMSO 100 mg/mL (108.05 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Lösungsmittel einzeln und der Reihe nach zum Produkt hinzufügen.)
Homogeneous suspension
CMC-NA
≥5mg/ml Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution
2%DMSO 40%PEG300 5%Tween80 53%ddH2O

Validiert von Selleck Labs. Sollten Sie Anpassungen an dieser Formulierung benötigen, wenden Sie sich an unser Vertriebsteam für kundenspezifische Tests.

 1.250mg/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. 
* <1 mg/ml bedeutet schwer löslich oder unlöslich.
* Bitte beachten Sie, dass Selleck die Löslichkeit aller Verbindungen intern testet und die tatsächliche Löslichkeit geringfügig von veröffentlichten Werten abweichen kann. Dies ist normal und ist auf geringfügige Batch-zu-Batch-Variationen zurückzuführen.
* Versand bei Raumtemperatur (Stabilitätstests zeigen, dass dieses Produkt ohne Kühlmaßnahmen versendet werden kann.)

Vorbereitung von Stammlösungen

Biologische Aktivität

Beschreibung Lapatinib Ditosylate ist ein potenter EGFR- und ErbB2-Inhibitor mit einer IC50 von 10,8 bzw. 9,2 nM in zellfreien Assays.
Ziele
ErbB2
(Cell-free assay)		 EGFR
(Cell-free assay)		 ErbB4
(Cell-free assay)
9.2 nM 10.8 nM 367 nM
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. This compound 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, it inhibits the growth of both EGFR- and ErbB2-overexpressing cells. It 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. This chemical 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.
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.

Protokoll (aus Referenz)

Kinase-Assay:[1]
  • In-vitro-Kinase-Assays

    Die IC50-Werte für die Hemmung der Enzymaktivität werden durch Messung der Hemmung der Phosphorylierung eines Peptidsubstrats generiert. Die intrazellulären Kinasedomänen von EGFR und ErbB2 werden aus einem Baculovirus-Expressionssystem gereinigt. EGFR- und ErbB2-Reaktionen werden in 96-Well-Polystyrol-Rundbodenplatten in einem Endvolumen von 45 μL durchgeführt. Die Reaktionsgemische enthalten 50 mM 4-Morpholinpropansulfonsäure (pH 7,5), 2 mM MnCl2, 10 μM ATP, 1 μCi [γ33P] ATP/Reaktion, 50 μM Peptid A [Biotin-(Aminohexansäure)-EEEEYFELVAKKK-CONH2], 1 mM Dithiothreitol und 1 μL DMSO, das serielle Verdünnungen dieser Verbindung ab 10 μM enthält. Die Reaktion wird durch Zugabe der angegebenen gereinigten intrazellulären Domäne des Typ-1-Rezeptors initiiert. Die hinzugefügte Enzymmenge beträgt 1 pmol/Reaktion (20 nM). Die Reaktionen werden nach 10 Minuten bei 23 °C durch Zugabe von 45 μL 0,5%iger Phosphorsäure in Wasser beendet. Das beendete Reaktionsgemisch (75 μL) wird auf Phosphozellulose-Filterplatten überführt. Die Platten werden filtriert und dreimal mit 200 μL 0,5%iger Phosphorsäure gewaschen. Szintillationscocktail (50 μL) wird zu jeder Vertiefung gegeben, und der Assay wird durch Zählung in einem Packard Topcount quantifiziert. Die IC50-Werte werden aus 10-Punkt-Dosis-Wirkungs-Kurven generiert.
Zell-Assay:[1]
  • Zelllinien

    HFF, MCF-7, T47D, A-431, HN5, BT474, N87, CaLu-3, HB4a, and HB4a c5.2

  • Konzentrationen

    Dissolved in DMSO, final concentrations ~100 μM

  • Inkubationszeit

    72 hours

  • Methode

    Cells are exposed to various concentrations of Lapatinib Ditosylate 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.
Tierstudie:[1]
  • Tiermodelle

    CD-1 nude female mice implanted s.c. with HN5 cells, and C.B-17 SCID female mice implanted s.c. with BT474 cells

  • Dosierungen

    ~100 mg/kg

  • Verabreichung

    Orally twice daily

Referenzen

  • https://pubmed.ncbi.nlm.nih.gov/12467226/

Kundenproduktvalidierung

<p>Combination of NVP-AEW541 and lapatinib cooperatively inhibits the growth of NVP-AEW541 resistant murine rhabdomyosarcoma primary cell cultures with Igf1r/Her2 complexes. Cell viability assay for Naïve, untreated (U20325; A) and NVP-AEW541 innately resistant mouse rhabdomyosarcoma primary culture (U44676; B) treated with varying concentrations of NVP-AEW541, lapatinib, or a combination of both. Naïve cells (U20325) were sensitive to NVP-AEW541, but lapatinib had no cooperativity. In contrast, NVP-AEW541 at moderate doses increased cell growth in resistant cell cultures (U44676). However, this paradoxical effect was reduced by the addition of lapatinib, although lapatinib treatment alone had very little effect. C, the NVP-AEW541 resistant primary tumor cell line (U44676) was treated with DMSO, 5 μmol/L lapatinib, 5 μmol/L NVP-AEW541, and a combination of 5 μmol/L NVP-AEW541+lapatinib for 25 minutes and Western blot analysis was done on lysates for p-Igf1r and p-Her2.</p>

Daten von [ Mol Cancer Ther , 2011 , 10:697-707 ]

<p>Capacity of the TKI to overcome the AML-typical differentiation blockage. The myeloid cell lines MOLM-13 and HL-60 were incubated for 6 days with 0.01% DMSO (serving as a negative solvent control), 1 μM of ATRA (serving as a positive control), as well as with the indicated doses of the four TKI. (A) Representative May-Gruenwald-Giemsa staining of MOLM-13 cells, (B) quantitation of the percentage of MOLM-13 cells exhibiting at least two morphological signs of differentiation (that is a decrease in cytoplasmic basophilia, a reduction of the nucleo-cytoplasmic ratio, appearance of nuclear lobulation and/or cytoplasmic granules). Percentages were evaluated by examining at least 100 cells/condition; (C) representative FACS overlays of MOLM-13 cells depicting TKI-induced CD11b expression (black line) as compared to the isotype (shaded grey); (D) quantitation of TKI-induced CD11b-expression in MOLM-13 cells; (E) representative slides depicting morphology/staining of MOLM-13 cells assessed in the NBT-reduction assay; (F) respective quantitative assessment demonstrating the NBT-reducing capacity under the different drugs; (G) representative May-Gruenwald-Giemsa staining of HL-60 cells.</p><div><div> </div></div><p> </p>

Daten von [ Biochem Pharmacol , 2011 , 82, 1457-1466 ]

<p>Impact of the TKI erlotinib, lapatinib, dasatinib, and sorafenib on the viability of MDS/AML cells. MOLM-13 (A) and HL-60 (B) cells were incubated with the indicated doses (given in mM below the x-axis) of the 4 TKI, and cellular viability was assessed by MTT assay after 24, 48 and 72 h of incubation. Changes in viability are given as percentage of cells as compared to non-treated control samples. This experiment was repeated at least three times, yielding comparable results. Graphs show representative results of one experiment carried out in duplicates (mean   standard deviation).</p><div><div> </div></div><p> </p>

Daten von [ Biochem Pharmacol , 2011 , 82, 1457-1466 ]

<p>Inhibition of signaling pathway activation in lung tumor cell lines by kinase inhibitors. Lung tumor cells were cultured in 10% FBS until reaching ∼80% confluence and then the cells were starved in serum-free medium for overnight, followed by 4-hour treatment with the inhibitors. Cell lysates were then prepared and used for determination of the pathway activation signals by the CEER assay.</p>

Daten von [ Int J Proteomics , 2011 , 2011, 215496 ]

Selleck's Lapatinib Ditosylate Wurde zitiert von 152 Publikationen

Inactivation of necroptosis-promoting protein MLKL creates a therapeutic vulnerability in colorectal cancer cells [ Cell Death Dis, 2025, 16(1):118] PubMed: 39979285
Lapatinib-Loaded ZIF‑8 Nanoparticles: A Multifunctional Drug Delivery System with Anticancer, Antibacterial, and Antioxidant Properties [ ACS Omega, 2025, 10(48):58175-58193] PubMed: 41502678
Multiscale Modeling Uncovers Macrophage Infiltration and TNF-α Signaling Networks for Targeting in Inflammatory Breast Cancer Tumor Emboli [ bioRxiv, 2025, 2025.05.29.656249] PubMed: 40502021
Altered ribosomal profile in acquired resistance and reversal associates with pathological response to chemotherapy in inflammatory breast cancer [ NPJ Breast Cancer, 2024, 10(1):65] PubMed: 39075068
Patient-derived rhabdomyosarcoma cells recapitulate the genetic and transcriptomic landscapes of primary tumors [ iScience, 2024, 27(10):110862] PubMed: 39319271
Profiling of ERBB receptors and downstream pathways reveals selectivity and hidden properties of ERBB4 antagonists [ iScience, 2024, 27(2):108839] PubMed: 38303712
Massively parallel reporter assays identify enhancer elements in oesophageal Adenocarcinoma [ NAR Cancer, 2024, 6(4):zcae041] PubMed: 39417090
Overcoming brain-derived therapeutic resistance in HER2+ breast cancer brain metastasis [ bioRxiv, 2024, 2024.02.19.581073] PubMed: 38529509
Proteomic Assessment of SKBR3/HER2+ Breast Cancer Cellular Response to Lapatinib and Investigational Ipatasertib Kinase Inhibitors [ bioRxiv, 2024, 2024.04.02.587656] PubMed: 38617302
Protocol for identifying properties of ERBB receptor antagonists using the barcoded ERBBprofiler assay [ STAR Protoc, 2024, 5(2):102987] PubMed: 38635397

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