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LY2784544 (Synonyms: Gandotinib)

Catalog No.GC13848

Potent inhibitor of JAK2

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LY2784544 Chemical Structure

Cas No.: 1229236-86-5

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10mM (in 1mL DMSO)
$84.00
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5mg
$71.00
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10mg
$131.00
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50mg
$368.00
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200mg
$1,013.00
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Sample solution is provided at 25 µL, 10mM.

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Description of LY2784544

LY2784544 is a potent, selective inhibitor of JAK2 with IC50 value of 3 nM.[1]
Janus kinase 2 (JAK2) belongs to the Janus kinase family and is a member of the type II cytokine receptor family. It is a non-receptor tyrosine kinase. The JAK2 mutation (V617F) within the autoinhibitory pseudokinase domain results in a gain-of-function activation of JAK2.The JAK2V617F mutant results in subsequent phosphorylation of signal transducer and activator of transcription 5 (STAT5). Then, STAT5 regulates the transcription of genes associated with cell growth, death and differentiation. The JAK2V617F mutant is oncogenic in cells, and sufficient for generating the myeloproliferative neoplasms (MPN) phenotypes in murine models. Mutant JAK2 kinase is an attractive therapeutic target for the therapy of MPNs. To selectively inhibit JAK2V617F but minimizing inhibition of wild-type JAK2 would be an optimal treatment approach.
LY2784544 is a potent and ATP-competitive inhibitor of JAK2 tyrosine kinase. LY2784544 has 8- and 16-fold selectivity for JAK2 than JAK1 and JAK3, respectively. LY2784544 more effective on inhibiting the phosphorylation of STAT5 in Ba/F3-TEL-JAK2 cells than in Ba/F3-TEL- JAK3 and –JAK1 cells with IC 50 of 0.191 (JAK2), 2.904 (JAK1) and 4.744 nM (JAK3). LY2784544 significantly inhibited STAT5 phosphorylation at a concentration range from 50 nM–20 nM in Ba/F3 cells expressing JAK2V617F. On the other hand, LY2784544 showed minimal inhibition of STAT5 phosphorylation at 50 and 200 nM concentrations in IL-3-stimulated Ba/F3 cells which express wild-type JAK2. LY2784544 significantly inhibited the cell proliferation of JAK2V617F-expressing cells with IC50 =55 nM. In JAK2V617F-expressing cells, LY2784544 induced apoptosis with EC50±s.d.of 113±0.023 nM measured by Caspase3/7-glo assays.[1]
LY2784544 with a TED50 (threshold effective Dose 50) of 12.7 mg/kg, potently inhibits STAT5 phosphorylation in SCID mice bearing Ba/F3-JAK2V617F-GFP. In mouse hematologic disease model, LY2784544 also dose-dependly reduces Ba/F3-JAK2V617F-GFP tumor burden.[1]
References:
1.Ma L, Clayton JR, Walgren RA, Zhao B, Evans RJ, Smith MC, Heinz-Taheny KM, Kreklau EL, Bloem L, Pitou C et al: Discovery and characterization of LY2784544, a small-molecule tyrosine kinase inhibitor of JAK2V617F. Blood Cancer J 2013, 3:e109.

Protocol of LY2784544

Cell experiment:

Ba/F3 cells expressing JAK2V617F are placed in RPMI-1640-containing vehicle (DMSO) or Gandotinib (LY2784544) (concentration range, 0.001-20 μM) (1×104 cells/96-well). Ba/F3 cells expressing wild-type JAK2 are treated similarly except IL-3 (2 ng/mL) is added. After a 72-hour incubation, cell proliferation is assessed by adding Cell Titer 96 Aqueous One Solution Reagent (20 μL/well). The IC50 for inhibition of cell proliferation is calculated using the GraphPad Prism 4 software[1].

Animal experiment:

Mice[1]Dose- and time-dependent in vivo inhibition of JAK2V617F signaling is assessed by measuring inhibition of STAT5 phosphorylation in a mouse ascitic tumor model. Ba/F3-JAK2V617F-GFP cells (1×107) are implanted in the intraperitoneal cavity of severe combined immunodeficiency mice (SCID mice) and allowed to develop into ascitic tumors for 7 days. For dose-response studies (six animals/group), Gandotinib (LY2784544) is administered once by oral gavage (2.5, 5, 10, 20, 40, or 80 mg/kg), then 30 min later, ascitic tumor cells are collected, fixed, incubated for 2 h with Mouse-anti-pSTAT5 (pY694) Alexa Fluor 647 (1:10 dilution), and analyzed by flow cytometry. Time course studies are performed similarly, except the animals are treated with Gandotinib (LY2784544) at 20, 40 or 80 mg/kg and ascitic tumor cells collected at prespecified intervals of 0.25-6 h after dosing. Data are analyzed by the one-way analysis of variance, and Dunnett's test (α=0.05). Dose response data are analyzed with a four-parameter logistic curve-fitting program.

References:

[1]. Ma L, et al. Discovery and characterization of LY2784544, a small-molecule tyrosine kinase inhibitor of JAK2V617F. Blood Cancer J. 2013, 3, e109.

Chemical Properties of LY2784544

Cas No. 1229236-86-5 SDF
Synonyms Gandotinib
Chemical Name 3-[(4-chloro-2-fluorophenyl)methyl]-2-methyl-N-(5-methyl-1H-pyrazol-3-yl)-8-(morpholin-4-ylmethyl)imidazo[1,2-b]pyridazin-6-amine
Canonical SMILES CC1=CC(=NN1)NC2=NN3C(=C(N=C3C(=C2)CN4CCOCC4)C)CC5=C(C=C(C=C5)Cl)F
Formula C23H25ClFN7O M.Wt 469.94
Solubility ≥ 23.5 mg/mL in DMSO, ≥ 5.65 mg/mL in EtOH with ultrasonic and warming Storage Store at -20°C
General tips Please select the appropriate solvent to prepare the stock solution according to the solubility of the product in different solvents; once the solution is prepared, please store it in separate packages to avoid product failure caused by repeated freezing and thawing.Storage method and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored at -20°C, please use it within 1 month.
To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time.
Shipping Condition Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request.

Complete Stock Solution Preparation Table of LY2784544

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1 mg 5 mg 10 mg
1 mM 2.1279 mL 10.6397 mL 21.2793 mL
5 mM 0.4256 mL 2.1279 mL 4.2559 mL
10 mM 0.2128 mL 1.064 mL 2.1279 mL
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