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874819-74-6

874819-74-6 structure
874819-74-6 structure
  • Name: Toceranib phosphate
  • Chemical Name: 5-[(Z)-(5-fluoro-2-oxo-1H-indol-3-ylidene)methyl]-2,4-dimethyl-N-(2-pyrrolidin-1-ylethyl)-1H-pyrrole-3-carboxamide,phosphoric acid
  • CAS Number: 874819-74-6
  • Molecular Formula: C22H28FN4O6P
  • Molecular Weight: 494.45300
  • Catalog: Research Areas Cancer
  • Create Date: 2018-02-14 08:00:00
  • Modify Date: 2024-01-03 00:57:49
  • Toceranib phosphate is a multitargeted indolinone receptor tyrosine kinase (RTK) inhibitor with Kis of 5 and 6 nM for PDGFRβ and Flk-1/KDR, respectively.
Name 5-[(Z)-(5-fluoro-2-oxo-1H-indol-3-ylidene)methyl]-2,4-dimethyl-N-(2-pyrrolidin-1-ylethyl)-1H-pyrrole-3-carboxamide,phosphoric acid
Synonyms UNII-24F9PF7J3R
Toceranib phosphate
Palladia
24F9PF7J3R
Toceranib phosphate (USAN)
SU 11654
Toceranib (phosphate)
Description Toceranib phosphate is a multitargeted indolinone receptor tyrosine kinase (RTK) inhibitor with Kis of 5 and 6 nM for PDGFRβ and Flk-1/KDR, respectively.
Related Catalog
Target

PDGFRβ:5 nM (Ki)

Flk-1:6 nM (Ki)

In Vitro Toceranib (SU11654) is a selective inhibitor of the tyrosine kinase activity of several members of the split kinase RTK family, including PDGFR and Flk-1/KDR, with Kis of 5 and 6 nM, respectively[1]. To explore mechanisms of acquired Toceranib (TOC) resistance in canine MCT, three resistant sublines are generated from the Toceranib-sensitive exon 11 ITD c-kit mutant C2 cell line designated TR1, TR2, and TR3. Growth of the parental C2 cells is inhibited by Toceranib in a dose-dependent manner with an IC50 of <10 nM. In contrast, TR1, TR2, and TR3 sublines are resistant to inhibition by Toceranib (IC50> 1,000 nM). Sensitivity to three other KIT RTK inhibitors is similar to the observed resistance to Toceranib. The parental line as well as all three sublines retains sensitivity to the cytotoxic agents vinblastine (VBL) and CCNU. Following 72 hr culture in the presence of increasing concentrations of Toceranib, treatment naïve, parental C2 cells detach from the culture flask and become rounded, shrunken, and clumped with increased exposure to Toceranib. In contrast, Toceranib-induced morphologic differences are not identified in the resistant sublines[2].
In Vivo Administration of Toceranib significantly decreases the number and percentage of Treg in the peripheral blood of dogs with cancer. Dogs receiving Toceranib and cyclophosphamide (CYC) demonstrate a significant increase in serum concentrations of IFN-γ, which is inversely correlated with Treg numbers after 6 weeks of combination treatment[3].
Cell Assay The c-kit mutant canine C2 mastocytoma cell line, derived from a spontaneously occurring cutaneous mast cell tumors (MCTs), is used as the parental cell line. Cells are propagated in RPMI 1640 supplemented with 2 mM L-glutamine, 10% FBS, 100 g/mL Streptomycin, and 100 U/mL Penicillin in a 37°C incubator under a humidified atmosphere of 5% CO2. Toceranib-resistant C2 cells are selected by growing C2 cells in concentrations of Toceranib ranging from 0.02 uM to 0.3 uM and increasing in 0.025-0.05 uM increments. Three independent, Toceranib -resistant sublines are established over a period of 7 months[2].
Animal Admin Dogs[3] Fifteen client-owned dogs with advanced tumors are used. Dogs receive Toceranib at 2.75 mg/kg once every other day. After 2 weeks, oral cyclophosphamide (CYC) is added at 15 mg/m2 daily. Numbers of Treg and lymphocyte subsets are measured in blood by flow cytometry during the 8-week study period. Serum concentrations of IFN-γ are measured by ELISA.
References

[1]. London CA, et al. Phase I dose-escalating study of SU11654, a small molecule receptor tyrosine kinase inhibitor, in dogs with spontaneous malignancies. Clin Cancer Res. 2003 Jul;9(7):2755-68.

[2]. Halsey CH, et al. Development of an in vitro model of acquired resistance to toceranib phosphate (Palladia®) in canine mast cell tumor. BMC Vet Res. 2014 May 6;10:105.

[3]. Mitchell L, et al. Clinical and immunomodulatory effects of toceranib combined with low-dose cyclophosphamide in dogs with cancer. J Vet Intern Med. 2012 Mar-Apr;26(2):355-62.
Molecular Formula C22H28FN4O6P
Molecular Weight 494.45300
Exact Mass 494.17300
PSA 171.78000
LogP 2.75810
Storage condition -20℃

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title: CAS No. 874819-74-6 | Chemsrc address: https://www.chemsrc.com/en/baike/52612.html

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