hrvatski jezikClear Cookie - decide language by browser settings

Antioxidant Activities of Alkyl Substituted Pyrazine Derivatives of Chalcones—In Vitro and In Silico Study

Stepanić, Višnja; Matijašić, Mario; Horvat, Tea; Verbanac, Donatella; Kučerová-Chlupáčová, Marta; Saso, Luciano; Žarković, Neven (2019) Antioxidant Activities of Alkyl Substituted Pyrazine Derivatives of Chalcones—In Vitro and In Silico Study. Antioxidants, 8 (4). pp. 90-102. ISSN 2076-3921

PDF - Published Version - article
Available under License Creative Commons Attribution.

Download (634kB) | Preview


Chalcones are polyphenolic secondary metabolites of plants, many of which have antioxidant activity. Herein, a set of 26 synthetic chalcone derivatives with alkyl substituted pyrazine heterocycle A and four types of the monophenolic ring B, were evaluated for the potential radical scavenging and antioxidant cellular capacity influencing the growth of cells exposed to H2O2. Before that, compounds were screened for cytotoxicity on THP-1 and HepG2 cell lines. Most of them were not cytotoxic in an overnight MTS assay. However, three of them, 4a, 4c and 4e showed 1, 1-diphenyl-2-picrylhydrazyl (DPPH●) radical scavenging activity, through single electron transfer followed by a proton transfer (SET-PT) mechanism as revealed by density functional theory (DFT) modeling. DFT modeling of radical scavenging mechanisms was done at the SMD//(U)M052X/6-311++G** level. The in vitro effects of 4a, 4c and 4e on the growth of THP-1 cells during four days pre- or post-treatment with H2O2 were examined daily with the trypan blue exclusion assay. Their various cellular effects reflect differences in their radical scavenging capacity and molecular lipophilicity (clogP) and depend upon the cellular redox status. The applied simple in vitro-in silico screening cascade enables fast identification and initial characterization of potent radical scavengers.

Item Type: Article
Uncontrolled Keywords: antioxidant ; chalcone-like ; DFT ; in silico ; in vitro ; pyrazine ; radical scavenging
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Interdisciplinary Natural Sciences
Divisions: Division of Molecular Medicine
Depositing User: Višnja StepaniÄ�
Date Deposited: 10 Jun 2019 10:12
DOI: 10.3390/antiox8040090

Actions (login required)

View Item View Item


Downloads per month over past year

Increase Font
Decrease Font
Dyslexic Font