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Biological Description

Description: matinib is an inhibitor of the receptor tyrosine kinases c-Abl, Bcr-Abl, PDGFR, and c-Kit (IC50: 600/100/100 nM).

Targets&IC50: c-Kit:100 nM (cell free), PDGFR:100 nM (cell free)

In vitro: Imatinib (STI 571) inhibited c-kit autophosphorylation, activation of mitogen-activated protein (MAP) kinase, and activation of Akt without altering total protein levels of c-kit, MAP kinase, or Akt. The concentration that produced 50% inhibition for these effects was approximately 100 nmol/L. STI 571 also significantly decreased SLF-dependent growth of M-07e cells in a dose-dependent manner and blocked the antiapoptotic activity of SLF. Imatinib mesylate had a more similar effect on Bcr/Abl- and c-Kit–dependent proliferation, with an IC50 of 19 nM in R10(-) cells and 82 nM in MO7e cells growing in the presence of SCF (KL, Kit ligand), respectively. STI571 inhibited tyrosine phosphorylation and cell growth of Ba/F3 cells expressing BCR/ABL, TEL/ABL, TEL/PDGFbetaR, and TEL/ARG with an IC(50) of approximately 0.5 microM in each case, but it had no effect on untransformed Ba/F3 cells growing in IL-3 or on Ba/F3 cells transformed by TEL/JAK2.

In vivo: Imatinib (25 mg/kg/day, p.o.) significantly reduced the endometriosis score compared to normal saline. It significantly decreased the ovarian follicle number compared to normal saline. The CD117 staining score of rats administered imatinib was significantly lower than that of the rats received normal saline. After intraperitoneal injection of STI571, it has 80%, 40% and 78% growth inhibition of SCLC6, SCLC61, and SCLC108 tumors, respectively, without any significant inhibition of SCLC74 tumor growth.

Cell Research: M-07e cells were grown in serum-free RPMI 1640 at 37°C for approximately 18 hours before they were incubated for 90 minutes in the presence of various concentrations of STI 571. The cells were then pelleted and resuspended in 1 mL RPMI 1640. STI 571 was added to each tube to achieve the same concentration used during the 90 minutes of preincubation. The cells were then incubated with inhibitor and growth factor (SLF or GM-CSF) for 15 minutes at 37°C. Subsequently, the cell pellets were lysed with 100 to 250 μL of protein lysis buffer (50 mmol/L Tris, 150 mmol/L sodium chloride, 1% NP-40, and 0.25% deoxycholate, with addition of the inhibitors aprotinin, leupeptin, pepstatin, phenylmethyl sulfonyl fluoride, and sodium orthovanadate). Western immunoblot analysis was performed as previously described.41Experiments with HMC-1 cells were performed in the same way except that neither SLF nor GM-CSF was added.

Animal Research: Swiss mice (nu/nu, female), weighing 30 g, 6 – 8 weeks old, were bred in the animal facilities, maintained under specific pathogen-free conditions with artificial lighting (12 hr light/12 hr dark cycle) and fed a regular diet and water ad libitum. For therapeutic trials, the tumor-bearing mice were randomly divided into equivalent groups of 5 to 12 animals and mice were treated as soon as the xenografted tumors reached a diameter of 5 mm (or a tumor volume of approximately 60 mm^3). Four different human tumors were used: the SCLC6, SCLC61, SCLC 74 and SCLC108 small cell lung cancers. STI571 was administered at a total dosage of 70 or 100 mg/kg per day in 1 or 2 intraperitoneal injections, with or without etoposide plus ifosfamide or topotecan. STI571 was diluted in 150 l of H2O and administered on different days, as indicated. Etoposide and ifosfamide were diluted in 200 l of 0.9% sodium chloride, and topotecan was diluted in 150 l of 0.9% sodium chloride. The control group received injections according to the same schedule as experimentally treated mice. All mice were weighed once weekly. Tumor growth was monitored by measuring 2 perpendicular diameters with calipers. Tumor volume (V) and the relative tumor volume (RTV) were calculated as:. V = a^2 × b/2,. where a is the width (large diameter) and b the length (small. diameter) of the tumor in millimeters, and. RTV = Vx/Vi,. where Vx is the mean tumor volume in cubic millimeters at any given time and Vi is the mean initial tumor volume in cubic millimeters at the start of treatment. Mice were ethically sacrificed when the tumor volume reached 2,500 mm^3.

Chemical Properties

Molecular Weight: 493.615

Formula: C29H31N7O

CAS No.: 152459-95-5

Storage & Solubility Information

Storage

store at low temperture

Powder: -20°C for 3 years

In solvent: -80°C for 2 years

Solubility Information

DMSO: 66.9 mM

( < 1 mg/ml refers to the product slightly soluble or insoluble )

Catalog #: T6230

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References and Literature

1. Heinrich MC, et al. Inhibition of c-kit receptor tyrosine kinase activity by STI 571, a selective tyrosine kinase inhibitor. Blood. 2000 Aug 1;96(3):925-32.

2. Wolff NC, et al. PD166326, a novel tyrosine kinase inhibitor, has greater antileukemic activity than imatinib mesylate in a murine model of chronic myeloid leukemia. Blood. 2005 May 15;105(10):3995-4003. Epub 2005 Jan 18.

3. Okuda K, et al. ARG tyrosine kinase activity is inhibited by STI571.Blood. 2001 Apr 15;97(8):2440-8

4. Yildiz C, et al. Effect of imatinib on growth of experimental endometriosis in rats. Eur J Obstet Gynecol Reprod Biol. 2016 Feb;197:159-63.

5. Decaudin D, et al. In vivo efficacy of STI571 in xenografted human small cell lung cancer alone or combined with chemotherapy. Int J Cancer. 2005 Feb 20;113(5):849-56.

6. Dong L, Shen S, Chen W, et al. Discovery of Novel Inhibitors Targeting Human O-GlcNAcase: Docking-Based Virtual Screening, Biological Evaluation, Structural Modification, and Molecular Dynamics Simulation[J]. Journal of chemical information and modeling. 2019, 59(10): 4374-4382.

7. Liu H M, Guo C L, Zhang Y F, et al. Leonurine-repressed miR-18a-5p/SOCS5/JAK2/STAT3 axis activity disrupts CML malignancy[J]. Frontiers in Pharmacology. 2021, 12.