» Articles » PMID: 36835023

Towards Arginase Inhibition: Hybrid SAR Protocol for Property Mapping of Chlorinated -arylcinnamamides

Abstract

A series of seventeen 4-chlorocinnamanilides and seventeen 3,4-dichlorocinnamanilides were characterized for their antiplasmodial activity. In vitro screening on a chloroquine-sensitive strain of 3D7/MRA-102 highlighted that 23 compounds possessed IC < 30 µM. Typically, 3,4-dichlorocinnamanilides showed a broader range of activity compared to 4-chlorocinnamanilides. (2)--[3,5-bis(trifluoromethyl)phenyl]-3-(3,4-dichlorophenyl)prop-2-en-amide with IC = 1.6 µM was the most effective agent, while the other eight most active derivatives showed IC in the range from 1.8 to 4.6 µM. A good correlation between the experimental log and the estimated clogP was recorded for the whole ensemble of the lipophilicity generators. Moreover, the SAR-mediated similarity assessment of the novel (di)chlorinated -arylcinnamamides was conducted using the collaborative (hybrid) ligand-based and structure-related protocols. In consequence, an 'averaged' selection-driven interaction pattern was produced based in namely 'pseudo-consensus' 3D pharmacophore mapping. The molecular docking approach was engaged for the most potent antiplasmodial agents in order to gain an insight into the arginase-inhibitor binding mode. The docking study revealed that (di)chlorinated aromatic (C-phenyl) rings are oriented towards the binuclear manganese cluster in the energetically favorable poses of the chloroquine and the most potent arginase inhibitors. Additionally, the water-mediated hydrogen bonds were formed via carbonyl function present in the new -arylcinnamamides and the fluorine substituent (alone or in trifluoromethyl group) of -phenyl ring seems to play a key role in forming the halogen bonds.

References
1.
Alson S, Jansen O, Cieckiewicz E, Rakotoarimanana H, Rafatro H, Degotte G . In-vitro and in-vivo antimalarial activity of caffeic acid and some of its derivatives. J Pharm Pharmacol. 2018; 70(10):1349-1356. DOI: 10.1111/jphp.12982. View

2.
Ivanenkov Y, Chufarova N . Small-molecule arginase inhibitors. Pharm Pat Anal. 2013; 3(1):65-85. DOI: 10.4155/ppa.13.75. View

3.
Kos J, Bak A, Kozik V, Jankech T, Strharsky T, Swietlicka A . Biological Activities and ADMET-Related Properties of Novel Set of Cinnamanilides. Molecules. 2020; 25(18). PMC: 7570544. DOI: 10.3390/molecules25184121. View

4.
Eberhardt J, Santos-Martins D, Tillack A, Forli S . AutoDock Vina 1.2.0: New Docking Methods, Expanded Force Field, and Python Bindings. J Chem Inf Model. 2021; 61(8):3891-3898. PMC: 10683950. DOI: 10.1021/acs.jcim.1c00203. View

5.
Singh R, Pervin S, Karimi A, Cederbaum S, Chaudhuri G . Arginase activity in human breast cancer cell lines: N(omega)-hydroxy-L-arginine selectively inhibits cell proliferation and induces apoptosis in MDA-MB-468 cells. Cancer Res. 2000; 60(12):3305-12. View