mip-1α

Maraviroc (Selzentry) is a C-C Chemokine Receptor Type 5 (CCR5) antagonist, and for MIP-1α(IC50=3.3 nM), MIP-1β (IC50=7.2 nM) and RANTES(IC50=5.2 nM).Maraviroc inhibits HIV-1 entry via CCR5 coreceptor interaction.

MLN-3897 (CCR1 antagonist 10) is an orally active antagonist of CCR1 with a Ki of 2.3 nM for 125I-MIP-1α binding to THP-1 cell membranes. MLN-3897 inhibits Akt signaling and MM cell survival and proliferation.

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.

MLN-3897 TFA is a potent CCR1 antagonist that inhibits the binding of 125I-MIP-1α to THP-1 cell membranes.

BX471 hydrochloride (ZK-811752 hydrochloride) is a potent, selective non-peptide CCR1 antagonist with a Ki of 1 nM for human CCR1, exhibiting 250-fold selectivity over CCR2, CCR5, and CXCR4.

TAK-220 is a selective and orally bioavailable CCR5 antagonist with IC50 values of 3.5 nM for RANTES binding inhibition and 1.4 nM for MIP-1α binding inhibition to CCR5.

Met-RANTES (human) acetate is the acetate salt form of Met-RANTES (human). It acts as an antagonist for CCR1 and CCR5 receptors. This compound inhibits the human chemokines MIP-1α and MIP-1β, with respective IC50 values of 5 and 2 nM. Additionally, Met-RANTES (human) acetate reduces bone destruction and alleviates adjuvant-induced arthritis (AIA) in rats.

Fuscin is a quinonoid fungal metabolite originally isolated from O. fuscum that has diverse biological activities. It inhibits binding of the ADP/ATP translocase inhibitor atractyloside to rat liver mitochondria in an ADP-dependent manner when used at a concentration of 50 μM in a radioligand binding assay. Fuscin (20 μM) reduces the glutathione content of rat liver mitochondria to 28% of controls and inhibits NADH oxidation in sonicated pigeon heart mitochondria preparations in a concentration-dependent manner. It competes with macrophage inflammatory protein 1α (MIP-1α) for binding to CCR5 chemokine receptors in vitro with an IC50 value of 21 μM.

TAK-779 (Takeda 779) is an antagonist of chemokine receptor 5 (CCR5), CCR2b, and CXC chemokine receptor 3 (CXCR3).

Nagrestipen, a variant of the human macrophage inflammatory protein-1 alpha (MIP-1α), also referred to as ECI 301, exhibits antitumor activity. It is employed in therapeutic trials focused on cancer, assessing its efficacy in the contexts of tumors, metastasis, radiation oncology, and the analysis of tumor metastasis [1].

Trans-J-113863 serves as a potent antagonist of chemokine receptors CCR1 and CCR3, effectively inhibiting MIP-1α-induced chemotaxis in CCR1 transfectants and eotaxin-induced chemotaxis in CCR3 transfectants, with respective half-maximal inhibitory concentrations (IC50) of 9.57 nM and 93.8 nM [1] [2].