(Z)-SMI-4a is a selective ATP-competitive Pim-1 kinase inhibitor with an IC50 of 21 nM for Pim-1 compared to an IC50 of 100 nM for Pim-2 and with little or no activity against a panel of 50 other kinases tested.IC50 value: 21 nM (Pim1); 100 nM (Pim2) [1]Target: Pim-1in vitro: 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 [1]. Ectopic expression of phosphomimetic mutants of eIF4B conferred resistance to apoptosis by the Pim kinase inhibitor (Z)-SMI-4a in Abl-transformed cells [2].in vivo: 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 [1].
HS56 (Pim-DAPK3 inhibitor HS56) is a potent, dual Pim/DAPK3 inhibitor with Ki of 72 nM (Pim-3) and 315 nM (DAPK3), shows micromolar potency toward Pim-1 and Pim-2 (Ki=1.5 and 17 uM); displays a high degree of selectivity for DAPKs and Pims against a panel of 468 kinases, with only two off-target interactions TYK2 and GAK; also displays no significant inhibition or activation of nicotinic, adrenergic, or muscarinic receptors at 10 uM; HS56 delayed force onset, decreased contractile force, and reduced LC20 phosphorylation in excised rat caudal arterial VSM tissues, lowers blood pressure in spontaneously hypertensive mice without affecting heart rate.
SEL24-B489 (SEL24) is a potent, dual PIM and FLT3-ITD inhibitor with Kd of 2/2/3 nM for PIM1/2/3, Kd of 160/16 nM for FLT3-WT/FLT3-ITD, respectively; exhibits significantly broader on-target activity in AML cell lines (MV-4-11 GI50=20 nM) and primary AML blasts than selective FLT3-ITD or PIM inhibitors, decreases viability of AML cells with FLT3-TKD mutations associated with resistance to selective FLT3-ITD inhibitors; inhibits the growth of a broad panel of AML cell lines in xenograft models. Blood Cancer Phase 2 Clinical
SMI-16a is a selective Pim kinase inhibitor with IC50 values of 0.15, 0.02 and 48 μM for Pim1, Pim2 and PC3 cells, respectively.
TCS-PIM-1-4a is a Pim inhibitor that blocks mTORC1 activity via activation of AMPK; kills a wide range of both myeloid and lymphoid cell lines (with IC50 values ranging from 0.8 to 40 μM).IC50 value:Target: Pim SMI-4a a novel benzylidene-thiazolidine-2, 4-dione small molecule inhibitor of the Pim kinases, kills a wide range of both myeloid and lymphoid cell lines with precursor T-cell lymphoblastic leukemia/lymphoma (pre-T-LBL/T-ALL) being highly sensitive. Incubation of pre-T-LBL cells with 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 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 blocked the rapamycin-sensitive mTORC1 activity by stimulating the phosphorylation and thus activating the mTORC1 negative regulator AMP-dependent protein kinase (AMPK).
CX-6258 hydrochloride is a potent and kinase selective pan-Pim kinases inhibitor, with IC50s of 5 nM, 25 nM and 16 nM for Pim-1, Pim-2 and Pim-3, respectively[1].
INCB053914 phosphate is an inhibitor of Pim extracted from patent WO 2017044730 A1, compound 1; has an IC50 of less than 35 nM.
10-DEBC is a selective Akt inhibitor. 10-DEBC shows strong inhibitory activity against Moloney murine leukemia virus (Pim) kinase-1 (IC50=1.28 μM)[1].
CX-6258 is a potent, orally efficacious Pim 1/2/3 kinase(IC50=5 nM/25 nM/16 nM) inhibitor with excellent biochemical potency and kinase selectivity.IC50 Value: 5 nM/25 nM/16 nM (Pim 1/2/3) [1]Target: pan-Pimin vitro: CX-6258 inhibited Flt-3 and Pim-3 (IC50=0.134 and 0.016 uM). At 0.5 uM of CX-6258, only Pim-1, Pim-2, Pim-3, and Flt-3 of the 107 kinases tested were inhibited by more than 80%, showing excellent selectivity. CX-6258 was also shown to be a reversible inhibitor of Pim-1 (Ki=0.005 uM). CX-6258 showed robust antiproliferative potencies against all cell lines tested derived from human solid tumors and hematological malignancies. In mechanistic cellular assays with MV-4-11 human AML cells, (13) caused dose-dependent inhibition of the phosphorylation of 2 pro-survival proteins, Bad and 4E-BP1, at the Pim kinase specific sites S112 and S65 and T37/46, respectively[1]. Pim-1 inhibition using the small molecule inhibitor CX-6258 (12 mM, 3 h) diminishes endogenous NKX3.1 steady state levels in 22RV1 and LNCaP cells. CX-6258 treatment (12 mM, 3 h) treatment diminished steady-state levels of ectopic NKX3.1 in PC3 cells. CX-6258 treatment resulted in a significant reduction in NKX3.1 half-life. While ectopically expressed NKX3.1 in control cells had a half-life of _90 min, Pim-1 inhibition reduced the half-life to _52 min [2].in vivo: CX-6258 showed dose-dependent efficacy in mice bearing MV-4-11 xenografts, with 45% and 75% TGI at 50 and 100 mg/kg/day, respectively. Treatment of mice bearing PC3 xenografts with CX-6258 p.o. 50 mg/kg was also well tolerated and produced 51% TGI.
PIM-IN-1 is a pan-PIM kinase inhibitor (KG-1, EC50 = 61 nM; pS6, EC50 = 71 nM).
Hispidulin is a natural flavone with a broad spectrum of biological activities. Hispidulin is a Pim-1 inhibitor with an IC50 of 2.71 μM.
INCB053914 (INCB-053914) is a novel potent, and selective ATP-competitive, pan-PIM kinase inhibitor with IC50 of 0.24/30.0/0.12 nM for PIM1/2/3, respectively; INCB053914 is highly selective against a panel of more than 50 kinases (>475-fold selectivity) with exception of RSK2 (IC50=7.1 uM); inhibits cellular proliferation in a panel of cell lines derived from hematologic malignancies including AML, MM, DLBCL, MCL, and T-ALL with GI50 of <100 nM, inhibits proliferation in all MM cell lines with GI5050 of 13.2-230.0 nM; inhibits PIM kinase-mediated phosphorylation of BAD in MOLM-16 and KMS-12-BM cells with IC50 of 4 and 27 nM, also increases PIM2 expression in KG-1a (AML), Pfeiffer, and KMS12-PE cells; in vivo, INCB053914 inhibited Bcl-2-associated death promoter protein phosphorylation and dose-dependently inhibited tumor growth in acute myeloid leukemia and multiple myeloma xenografts. Solid Tumors Phase 2 Clinical
PIM447 is novel pan-PIM kinase inhibitor, including Moloney Murine Leukemia (PIM) 1, 2, and 3 Kinase.target: pan-PIM inhibitor [2] [3]In vitro: PIM447 is cytotoxic for myeloma cells due to cell cycle disruption and induction of apoptosis mediated by a decrease in phospho-Bad (Ser112) and c-Myc levels and the inhibition of mTORC1 pathway. PIM447 also inhibits in vitro osteoclast formation and resorption, downregulates key molecules involved in these processes and partially disrupts the F-actin ring, while increasing osteoblast activity and mineralization.[1]In vivo: PIM447 significantly reduces the tumor burden and preventes tumor-associated bone loss in a disseminated murine model of human myeloma.[1]
IBL-302 (AMU302) is an orally available dual-signaling inhibitor of PIM and PI3K/AKT/mTOR with activity against breast cancer and neuroblastoma. IBL-302 demonstrated in vivo efficacy in a nude mouse xenograft model, inhibiting trastuzumab (HY-P9907) resistance challenges. IBL-302 also enhances the effects of common cytotoxic chemotherapy drugs cisplatin (HY-17394), doxorubicin (HY-15142A), and etoposide (HY-13629)[1][2][3].