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AXL1717 (Picropodophyllotoxin) is a selective inhibitor of IGF-1R with IC50 value rangs from 0.24-0.33 μM [1].

IGF-1R (type 1 insulin-like growth factor receptor) is a transmembrane receptor that activated by IGF-1 and plays an important role in cell growth and anabolic effects in adults. It has been reported that over-expression of IGF-1R is correlated with a variety of cancers and its inhibitors has been revealed to anti-cancer in clinical study [1] [2].

AXL 1717 is a potent IGF-1RTK inhibitor and has ability to inhibit tumor cells combined with HDAC inhibitor LBH589. When tested with 4 human myeloma cells (RPMI 8226, Karpas707, LP-1, and OPM-2) and 1 murine cell (5T33MM), AXL1717 treatment markedly decreased cell survival in a dose-dependent manner, arrested cell cycle in G2-M phase and induced cell apoptosis by inhibiting IGF-1RTK [1]. In four colon carcinoma cell lines (HT-29, HCT-116, DLD-1 and CaCO-2), AXL1717 treatment showed high ability to inhibit cell proliferation and migration in a dose-dependent manner [2].

In mouse model with 5TMM subcutaneous xenograft, administration of AXL 1717 (1.5 mg/d) resulted in a prolonged survival in combination with LBH (2.5 mg/kg/d) compared with control group [1].

AXL1717 has been tested to treat non-small cell lung cancer patients in a Phase I/II clinically [3].

References:

[1].Lemaire, M., et al., The HDAC inhibitor LBH589 enhances the antimyeloma effects of the IGF-1RTK inhibitor picropodophyllin. Clin Cancer Res, 2012. 18(8): p. 2230-9.

[2].Feng, X., et al., Multiple antitumor effects of picropodophyllin in colon carcinoma cell lines: clinical implications. Int J Oncol, 2012. 40(4): p. 1251-8.

[3].Ekman, S., et al., Clinical Phase I study with an Insulin-like Growth Factor-1 receptor inhibitor: experiences in patients with squamous non-small cell lung carcinoma. Acta Oncol, 2011. 50(3): p. 441-7.

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