Ezh2 Inhibitor III, GSK126

A cell-permeable EI1 (Cat. No. 500561) structural analog that acts as an equally potent, SAM-competitive, Ezh2/PRC2 inhibitor (K_i = 0.5 to 3 nM against wt & mutant Ezh2-containing PRC2; [SAM] = 7.5 µM) with similar selectivity over Ezh1/PRC2 (K_i = 89 nM) and other HTMases as EI1. Among panels of 14 HDACs, 11 GPCRs, and 300 kinases, only serotonin 3 receptor, JMJD2d, and CaMK1a are significantly inhibited at much higher concentrations (IC₅₀ ≥4 µM). Shown to inhibit the proliferation of DLBCL (IC₅₀ 28 nM to 5.5 µM; 6 d treatment) in vitro and completely suppress Pfeiffer (A677G) and Karpas-422 (Y641N) tumor expansion in mice in vivo (50 mg/kg/d i.p.).

Please note that the molecular weight for this compound is batch-specific due to variable water content. Please refer to the vial label or the certificate of analysis for the batch-specific molecular weight. The molecular weight provided represents the baseline molecular weight without water.

A cell-permeable EI1 (Cat. No. 500561) structural analog that acts as an equally potent, SAM-competitive, Ezh2/PRC2 inhibitor (K_i = 0.5 to 3 nM against wt, A677G, Y641F, Y641H, Y641N, Y641S, Y641C Ezh2-containing PRC2; [SAM] = 7.5 µM) with similar selectivity over Ezh1/PRC2 (K_i = 89 nM) and other HTMases as EI1. Among panels of 14 HDACs, 11 GPCRs, and 300 kinases, only serotonin 3 receptors, JMJD2d, and CaMK1a are significantly inhibited at much higher concentrations (IC₅₀ = 4, 7.9, and ≥10 µM, respectively). In addition to DLBCL (diffuse large B cell lymphoma; IC₅₀ ranges from 28 nM to 5.5 µM; 6 d treatment), GSK126 is also shown to inhibit the proliferation of other B-NHL (non-Hodgkin′s lymphoma) and Hodgkin′s lymphoma cell lines, being least active against MC116, HD-MY-Z, WSU-FSCCL, Toledo, NU-DUL-1, and WILL-2 (IC₅₀ >10 µM; 6 d treatment). When administered at a daily i.p. dose of 50 mg/kg GSK126 is reported to completely suppress Pfeiffer (A677G) and Karpas-422 (Y641N) tumor expansion in mice in vivo, while complete tumor eradication can be achieved with higher dosing regimens (150 mg/kg/day or two 300 mg/kg dosages per week).

Packaged under inert gas

Toxicity: Standard Handling (A)

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

Use only fresh DMSO for reconstitution.

McCabe, M.T., et al. 2012. Nature.492, 108.

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