Nornidulin is a depsidone originally isolated from A. nidulans that has antibacterial activity against M. tuberculosis and M. ranoe as well as antifungal activity against T. tonsurans and M. audouini. It also inhibits the growth of methicillin-resistant S. aureus (MRSA; MIC = 2 μg ml) and has larvicidal activity toward Artemia (LC50 = 1.7 μg ml). Nornidulin has cytotoxic activity in MOLT-3 cells (IC50 = 35.7 μM) but not HuCCA-1, HepG2, or A549 cells (IC50s = >116.4 μM).
KZR-616, a first-in-class inhibitor of the immunoproteasome, selectively targets the LMP7 (IC50: 39/57 nM=hLMP7/mLMP7) and LMP2 (IC50: 131/179 nM=hLMP7/mLMP7) subunits of the immunoproteasome. KZR-616 has the potential for the research of multiple autoimmune diseases[1][2]. KZR-616 also inhibits MECL-1 subunit (IC50=623 nM) and constitutive proteasome β5 subunit (IC50=688 nM). KZR-616 maintains LMP7 and LMP2 selective inhibition in MOLT-4 cells. KZR-616 (250 nM) shows a comparable cytokine inhibition profile peripheral blood mononuclear cells (PBMC)[1].KZR-616 is an immunoproteasome-selective inhibitor identified based on the optimization of ONX-0914 and PR-924 [3]. KZR-616 (5 mg/kg; i.v.; dosing was repeated on days 6, 8, 11, and 13) shows efficacy in the anticollagen antibody induced arthritis (CAIA) model[1]. [1]. Johnson HWB, et al. Required Immunoproteasome Subunit Inhibition Profile for Anti-Inflammatory Efficacy and Clinical Candidate KZR-616 ((2 S,3 R)- N-(( S)-3-(Cyclopent-1-en-1-yl)-1-(( R)-2-methyloxiran-2-yl)-1-oxopropan-2-yl)-3-hydroxy-3-(4-methoxyphenyl)-2-(( S)-2-(2-morpholinoacetamido)propanamido)propenamide). J Med Chem. 2018 Dec 27;61(24):11127-11143. [2]. Muchamuel T, et al. FRI0296 Kzr-616, a selective inhibitor of the immunoproteasome, blocks the disease progression in multiple models of systemic lupus erythematosus (SLE). Annals of the Rheumatic Diseases 2018;77:685. [3]. Xi J, et al. Immunoproteasome-selective inhibitors: An overview of recent developments as potential drugs for hematologic malignancies and autoimmune diseases. Eur J Med Chem. 2019;182:111646.
Nidulin is a depsidone originally isolated from A. nidulans. It is active against the bacteria M. tuberculosis and M. ranoe, as well as the fungi T. tonsurans and M. audouini. It also inhibits the growth of methicillin-resistant S. aureus (MRSA; MIC = 4 μg ml) and has larvicidal activity toward Artemia (LC50 = 2.8 μg ml). Nidulin is cytotoxic to MOLT-3 cells (IC50 = 21.2 μM) but not HuCCA-1, HepG2, or A549 cells (IC50s = >112.7 μM). It inhibits aromatase with an IC50 value of 11.2 μM.
Myriceric acid B is a potent HIV-1 entry inhibitor targeting gp41 and can serve as a lead compound for novel anti-HIV-1 drug development. It scavenges DPPH free radicals with an IC50 value of 21.8 µM and inhibits aromatase activity with an IC50 value of [incomplete data].