Biochem/physiol Actions

Primary TargetIGF-1R both in vitro and in vivo

Reversible: yes

Product does not compete with ATP.

Cell permeable: yes

Target IC₅₀: 1 nM against IGF-1R in cell-free kinase assay; ≤ 60 nM for cell viability and receptor autophosphorylation in melanoma cell lines

General description

A cell-permeable, reversible, potent, substrate competitive, and specific inhibitor of IGF-1R both in vitro (IC₅₀ = 1 nM in cell-free kinase assay; ≤60 nM and for cell viability and receptor autophosphorylation in melanoma cell lines) and in vivo (complete inhibition of IGF-1R-dependent tumor cell growth at 20 mg/kg/12 hr i.p. in SCID mice with only minimal toxic effects (LD₅₀ >500 mg/kg). Exhibits little inhibition towards IR, FGFR, PDGFR and EGFR, and exerts no effects on microtubules and DNA topoisomerase II. Targets the phosphorylation of Y1136 in the activation loop and is the first inhibitor reported to discriminate between IGF-1R and IR.

A cell-permeable cis-cyclolignan compound that acts as a substrate competitive, reversible, potent, and specific inhibitor of IGF-1R both in vitro (IC₅₀ = 1 nM in cell-free kinase assay; ≤ 60 nM for cell viability and receptor autophosphorylation in melanoma cell lines) and in vivo (complete inhibition of IGF-1R-dependent tumor cell growth at 20 mg/kg/12 hr, i.p., in SCID mice) with minimum toxic effect (LD₅₀ >500 mg/kg). Exhibits little effect towards IR, FGFR, PDGFR and EGFR, and exerts no effects on microtubules and DNA topoisomerase II. Targets the phosphorylation of Y1136 in the activation loop and is the first inhibitor reported to discriminate between IGF-1R and IR.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Other Notes

Mazitschek, R., and Giannis, A. 2004. Curr. Opin. Chem. Biol.8, 432.Vasilcanu, D., et al. 2004. Oncogene23, 7854.Girnita, A., et al. 2004. Cancer Res.64, 236.

Packaging

1 mg in Plastic ampoule

Packaged under inert gas

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C. Unstable in solution at room temperature.

Warning

Toxicity: Carcinogenic / Teratogenic (D)