SMI-4a is a potent and selective Pim protein kinase inhibitor, which blocks the growth of precursor T-cell lymphoblastic leukemia/lymphoma. SMI-4a was found to induce phosphorylation of extracellular signal-related kinase1/2 (ERK1/2), and the combination of SMI-4a and a mitogen-activated protein kinase kinase 1/2 (MEK1/2) inhibitor was highly synergistic in killing pre-T-LBL cells. SMI-4a may be developed as a therapeutic strategy for the treatment of pre-T-LBL.
CAS Number: 438190-29-5
Molecular Weight: 273.23
Chemical Name: 5-(3-(trifluoromethyl)benzylidene)thiazolidine-2,4-dione
Appearance: Solid Power.
Purity: ≥98% (or refer to the Certificate of Analysis)
Solubility: 10 mM in DMSO
Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis
Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.
Shelf Life: ≥12 months if stored properly.
Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.
Drug Formulation: To be determined.
HS Tariff Code: 382200
How to use
Incubation of pre-T-LBL cells with (Z)-SMI-4a induced G1 phase cell-cycle arrest secondary to a dose-dependent induction of p27(Kip1), apoptosis through the mitochondrial pathway, and inhibition of the mammalian target of rapamycin C1 (mTORC1) pathway based on decreases in phospho-p70 S6K and phospho-4E-BP1, 2 substrates of this enzyme. In addition, treatment of these cells with (Z)-SMI-4a was found to induce phosphorylation of extracellular signal-related kinase1/2 (ERK1/2), and the combination of (Z)-SMI-4a and a mitogen-activated protein kinase kinase 1/2 (MEK1/2) inhibitor was highly synergistic in killing pre-T-LBL cells. Ectopic expression of phosphomimetic mutants of eIF4B conferred resistance to apoptosis by the Pim kinase inhibitor (Z)-SMI-4a in Abl-transformed cells .
In immunodeficient mice carrying subcutaneous pre-T-LBL tumors, treatment twice daily with (Z)-SMI-4a caused a significant delay in the tumor growth without any change in the weight, blood counts, or chemistries .
- Lin YW, et al. A small molecule inhibitor of Pim protein kinases blocks the growth of precursor T-cell lymphoblastic leukemia/lymphoma. Blood. 2010 ;115(4):824-33.
- Yang J, et al. eIF4B phosphorylation by pim kinases plays a critical role in cellular transformation by Abl oncogenes. Cancer Res. 2013 Aug 1;73(15):4898-908.
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