protein-protein interaction inhibitor

VTP50469 is a highly selective and orally active small molecule inhibitor of the Menin-MLL protein-protein interaction with potent anti-leukemic activity with a Ki of 104 pM.

BMS-202 (PD1-PDL1 inhibitor 2) is an inhibitor of the PD-1 (Programmed death- 1) PD-Ll (Programmed death-ligand 1) protein protein interaction.

BMS-1 (PD-1/PD-L1 inhibitor 1) is an inhibitor of the PD1-PD-L1 protein-protein interaction. It also acts as an immunomodulator. Programmed death ligand 1 (PD-L1) is a protein in humans that is encoded by the CD274 gene and the upregulation of PD-L1 allows Ys to evade the host immune system. High tumor expression of PD-L1 was associated with increased tumor aggressiveness and a 4.5-fold increased risk of death.

NLRP3 AIM2-IN-3 is a unique molecule that inhibits NLRP3 and AIM2 inflammasome activation in a species-specific manner. It has an IC50 value for cell lysis of 0.077 ± 0.008 μ M. NLRP3 AIM2-IN-3 is a potent inhibitor of NLRP3 and AIM2 inflammasome-dependent cell lysis with an IC50 value for cell lysis of 0.077 ± 0.008 μ M. NLRP3 AIM2-IN-3 inhibits LPS nigericin NLRP3 AIM2-IN-3 inhibits LPS nigericin-stimulated cell lysis in THP-1 macrophages with an IC50 value of 0.077 ± 0.008 μM. NLRP3 AIM2-IN-3 interferes with the interaction of NLRP3 or AIM2 with the bridging protein ASC, inhibiting oligomerization of ASC.

ICG001 is a β-catenin/TCF-mediated transcription inhibitor that selectively blocks β-catenin/CBP interaction without interfering with β-catenin/p300 interaction. It specifically binds to CREB protein with an IC50 of 3 μM.

STL127705 (Compound L) is a potent inhibitor of the Ku 70 80 heterodimer protein, disrupting Ku70 80-DNA interaction with an IC50 of 3.5 μM, and inhibiting Ku-dependent DNA-PKCS kinase activation with an IC50 of 2.5 μM.

BMS-1166-N-piperidine-CO-N-piperazine dihydrochloride, a resorcinol di-Ph ether scaffold-based programmed cell death-1 (PD-1) programmed cell death ligand 1 (PD-L1) inhibitor, inhibits the PD-1 PD-L1 interaction with an IC50 of 39.2 nM. It contains the target protein PD-1 PD-L1 ligand and PROTAC linker, which can be used to synthesize PROTAC PD-1 PD-L1 degrader-1 and has anticancer activity. Additionally, it serves as a diluent for the preparation of tablets for direct compression.

EM 163 is a TIR-TIR interaction inhibitor, which is a TIR (Toll/interleukin-1 receptor) structural domain mimic of the MyD88 protein. EM 163 targets the TIR structural domain in the IL-1 receptor and blocks the interaction with MyD88. EM 163 inhibits the production of inflammatory cytokines in vivo caused by staphylococcal enterotoxin B (SEB). EM 163 protects mice from SEB shock-induced death. In rat hippocampal neurons in vitro, EM 163 blocked the activation of p38 and the inhibitory effect of IL-1β on chemically induced long-term potentiation (LTP)-triggered protein synthesis.

CAM 833 is an effective orthosteric inhibitor of the BRCA2-RAD51 interaction, inhibiting RAD51 aggregation, enhancing DNA damage-induced apoptosis, increasing 4N cell cycle arrest, and disrupting homologous DNA repair (HDR), and can be used for cancer therapy.

VT103 is an orally active and selective inhibitor of TEAD1 protein palmitoylation and is an analog of VT101. VT103 has potential antitumor activity by inhibiting YAP TAZ-TEAD-promoted gene transcriptionment, blocking TEAD auto-palmitoylation, and blocking the interaction between YAP TAZ and TEAD.VT103 can be used in the study of HER2-positive breast cancer, prostate cancer, and triple-negative breast cancer.

ZW4864 (free base) is an orally active and selective β-catenin B-Cell lymphoma 9 protein-protein interaction (β-catenin BCL9 PPI) inhibitor, with a K_i value of 0.76 μM and an IC_50 value of 0.87 μM [1]. ZW4864 (free base) also demonstrates good pharmacokinetic properties.

HODHBt is a STAT5-SUMO protein-protein interaction inhibitor.

Talabostat (PT100, Val-boroPro) is a potent, nonselective and orally available dipeptidyl peptidase IV (DPP-IV) inhibitor with a Ki of 0.18 nM. Talabostat is a nonselective DPP-IV inhibitor, inhibiting DPP8 9, FAP, DPP2 and some other DASH family enzymes essentially as potently as it inhibits DPP-IV[1]. Talabostat stimulates the immune system by triggering a proinflammatory form of cell death in monocytes and macrophages known as pyroptosis. The inhibition of two serine proteases, DPP8 and DPP9, activates the proprotein form of caspase-1 independent of the inflammasome adaptor ASC[2]. Talabostat competitively inhibits the dipeptidyl peptidase (DPP) activity of FAP and CD26 DPP-IV, and there is a high-affinity interaction with the catalytic site due to the formation of a complex between Ser630 624 and the boron of talabostat[3]. Talabostat can stimulate immune responses against tumors involving both the innate and adaptive branches of the immune system. In WEHI 164 fibrosarcoma and EL4 and A20 2J lymphoma models, PT-100 causes regression and rejection of tumors. The antitumor effect appears to involve tumor-specific CTL and protective immunological memory. Talabostat treatment of WEHI 164-inoculated mice increases mRNA expression of cytokines and chemokines known to promote T-cell priming and chemoattraction of T cells and innate effector cells[3]. Talabostat treated mice show significant less fibrosis and FAP expression is reduced. Upon PT100 treatment, significant differences in the MMP-12, MIP-1α, and MCP-3 mRNA expression levels in the lungs are also observed. Treatment with PT100 in this murine model of pulmonary fibrosis has an anti-fibro-proliferative effect and increases macrophage activation[4]. [1]. Connolly BA, et al. Dipeptide boronic acid inhibitors of dipeptidyl peptidase IV: determinants of potencyand in vivo efficacy and safety. J Med Chem. 2008 Oct 9;51(19):6005-13. [2]. Okondo MC, et al. DPP8 and DPP9 inhibition induces pro-caspase-1-dependent monocyte and macrophage pyroptosis. Nat Chem Biol. 2017 Jan;13(1):46-53. [3]. Adams S, et al. PT-100, a small molecule dipeptidyl peptidase inhibitor, has potent antitumor effects and augments antibody-mediated cytotoxicity via a novel immune mechanism. Cancer Res. 2004 Aug 1;64(15):5471-80. [4]. Egger C, et al. Effects of the fibroblast activation protein inhibitor, PT100, in a murine model of pulmonary fibrosis. Eur J Pharmacol. 2017 Aug 15;809:64-72.

MM-102 (HMTase Inhibitor IX) is a potent inhibitor of WDR5 MLL interaction with IC50 of 2.4 nM and Ki of less than 1 nM in a WDR5 binding assay. MM-102 can also specifically inhibit cell growth and induce apoptosis in leukemia cells carrying MLL1 fusion protein.

Locostatin is a potent and cell permeable inhibitor of Raf kinase inhibitor protein (RKIP) Raf1 kinase interaction and an inhibitor of cell migration.

VH-298 is a potent inhibitor of VHL that stabilizes HIF-α and elicits a hypoxic response via a different mechanism, that is the blockade of the VHL:HIF-α protein-protein interaction downstream of HIF-α hydroxylation by PHD enzymes.

p53-MDM2-IN-1 (Example 30), an inhibitor of the p53-MDM2 X protein interaction, exhibits a K i value of 23.35 µM and holds potential for applications in anti-tumor research.

BRCA1-IN-2 is a cell membrane-crossing BRCA1 protein-protein interaction (PPI) inhibitor with antitumor activity that acts by disrupting the interaction of BRCA1 (BRCT)2 with proteins.

CCG 203769 (Thiadiazolidinone (TDZD) deriv. 6) is a selective inhibitor of RGS4 with an IC50 of 17 nM for the RGS4-Gαo protein-protein interaction.

Dri-c21045 showed concentration-dependent inhibition of NF- B activation and all CD40L induced by B cell proliferation. IC50 was 17.1 M and 4.5 M, respectively.Dri-c21045 is an effective selective inhibitor of CD40-CD40L synergistic stimulator protein-pro

IPR-803 is an effective inhibitor of the uPAR·uPA protein-protein interaction (PPI) with anti-tumor activity. IPR-803 binds directly to uPAR with a Ki of 0.2 μM.

IR415 selectively interacts with Hepatitis B virus X protein (HBx, Kd = 2 nM) and blocks HBV-mediated RNAi suppression, reverses the inhibitory effect of HBx protein on the activity of the dicer endoribonuclease. IR415 is a potent anti-HBV agent and inhibits HBV replication by blocking the HBx activity.

M-89, a highly potent and specific inhibitor of the menin-mixed lineage leukemia (Menin-MLL) protein-protein interaction, exhibits a Kd of 1.4 nM for menin binding. This compound holds potential for treating MLL leukemia.

Menin-MLL inhibitor 4 has antitumor activity.Menin-MLL inhibitor 4 is an inhibitor of Menin- MLL (mixed-lineage leukemia protein) interaction .