Discovery of a Plasmodium falciparum Glucose-6-phosphate Dehydrogenase 6-phosphogluconolactonase Inhibitor (R,Z)-N-((1-Ethylpyrrolidin-2-yl)methyl)-2-(2-fluorobenzylidene)-3-oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-6-carboxamide (ML276) That Reduces Parasite Growth in Vitro
摘要:
A high-throughput screen of the NIH's MLSMR collection of similar to 340000 compounds was undertaken to identify compounds that inhibit Plasmodium falciparum glucose-6-phosphate dehydrogenase (Pf G6PD). PfG6PD is important for proliferating and propagating P. falciparum and differs structurally and mechanistically from the human orthologue. The reaction catalyzed by glucose-6-phosphate dehydrogenase (G6PD) is the first, rate-limiting step in the pentose phosphate pathway (PPP), a key metabolic pathway sustaining anabolic needs in reductive equivalents and synthetic materials in fast-growing cells. In P. falciparum, the bifunctional enzyme glucose-6-phosphate dehydrogenase-6-phosphogluconolactonase (Pf GluPho) catalyzes the first two steps of the PPP. Because P. falciparum and infected host red blood cells rely on accelerated glucose flux, they depend on the G6PD activity of Pf GluPho. The lead compound identified from this effort, (R,Z)-N-((1-ethylpyrrolidin-2-yl)methyl)-2-(2-fluorobenzylidene)-3-oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-6-carbon-amide, 11 (ML276), is a submicromolar inhibitor of Pf G6PD (IC50 = 889 nM). It is completely selective for the enzyme's human isoform, displays micromolar potency (IC50 = 2.6 mu M) against P. falciparum in culture, and has good drug-like properties, including high solubility and moderate microsomal stability. Studies testing the potential advantage of inhibiting Pf G6PD in vivo are in progress.
The discovery of potent small molecule activators of human STING
作者:David C. Pryde、Sandip Middya、Monali Banerjee、Ritesh Shrivastava、Sourav Basu、Rajib Ghosh、Dharmendra B. Yadav、Arjun Surya
DOI:10.1016/j.ejmech.2020.112869
日期:2021.1
weak STING activators (human EC50 ∼10 μM) we identified several chemotypes with sub-micromolar STING activity across all the major protein polymorphs. An example compound 53 based on an oxindole core structure demonstrated robust on-target functional activation of STING (human EC50 185 nM) in immortalised and primary cells and a cytokine induction fingerprint consistent with STING activation. Our study
(EN) Compounds of Formula (I), and their agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetaion, wherein Q is (Q-1) or (Q-2); and A, Y, Z, R1-R7, q and r are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula (I) and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula (I).(FR) La présente invention concerne des composés représentés par la formule générale (I) ainsi que leurs sels admissibles d'un point de vue agricole. Ces produits conviennent à la lutte contre les végétations parasites. Dans la formule générale (I), Q est représenté par l'une ou l'autre des deux formules spécifiques (Q-1 ou Q-2), A, Y, Z, R1-R7, q et r étant conformes à leurs descriptions dans la demande. L'invention concerne également, non seulement des compositions à base des composés de la formule générale (I), mais également un procédé de lutte contre les végétations parasites, consistant à mettre en contact la végétation ou son milieu avec une quantité suffisante d'un composé de la formule générale (I).