Inhibitor against ArfGEF ARNO- and BRAG2/GEP100-dependent ARF1/6 activity. Inhibits melanoma growth in vitro and in vivo.
NAV-2729 (IC50 of 1.5 μM) has a therapeutic benefit in reducing the adverse effect of diabetic retinopathy in animal models.[1]
Originally characterized as a non-nucleotide-competitive and reversible ARF6-selective inhibitor (IC50 = 1.4 μM without GEF and 2.4 μM with 100 nM ARNO or BRAG2/GEP100) that targets ARF6 GEF-binding region, NAV-2729 prevents GEF-dependent ARF1 & ARF6 activity (% inhibition of BRAG2Sec7PH-stimulated GTPase activity/[NAV-2729] = 50% Δ17Arf1/10 μM and 15% Δ13Arf6/25 μM) with higher potency against BRAG2- than ARNO-dependent ARF1 activity (64% vs. 20% Δ17Arf1 inhibition at 25 μM in the presence of respective GEF sec7 domain). NAV-2729 treatment effectively inhibits G-alpha-q downstream signaling pathways and anchorage-independent colony growth of Mel92.1 & Mel202 melanoma cells in vitro (10 μM) as well as uveal melanoma tumor establishment in Mel202 xenograft mice in vivo (30 mg/kg/day i.p.).
Advances in biological regulation, 63, 115-121 (2016-10-26)
The Small GTPase ADP-ribosylation factor 6 (Arf6) functions as the molecular switch in cellular signaling pathways by cycling between GDP-bound inactive and GTP-bound active form, which is precisely regulated by two regulators, guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins
Activating mutations in Gαq proteins, which form the α subunit of certain heterotrimeric G proteins, drive uveal melanoma oncogenesis by triggering multiple downstream signaling pathways, including PLC/PKC, Rho/Rac, and YAP. Here we show that the small GTPase ARF6 acts as
Arf GTPases and their guanine nucleotide exchange factors (ArfGEFs) are major regulators of membrane traffic and organelle structure in cells. They are associated with a variety of diseases and are thus attractive therapeutic targets for inhibition by small molecules. Several
The Journal of clinical investigation, 127(12), 4569-4582 (2017-10-24)
The devastating sequelae of diabetes mellitus include microvascular permeability, which results in retinopathy. Despite clinical and scientific advances, there remains a need for new approaches to treat retinopathy. Here, we have presented a possible treatment strategy, whereby targeting the small
Antimicrobial agents and chemotherapy, 64(8) (2020-05-13)
The rise in multidrug-resistant (MDR) organisms portends a serious global threat to the health care system with nearly untreatable infectious diseases, including pneumonia and its often fatal sequelae, acute respiratory distress syndrome (ARDS) and sepsis. Gram-negative bacteria (GNB), including Acinetobacter
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