Title:Evaluation of Cytotoxic and Tyrosinase Inhibitory Activities of 2-phenoxy(thiomethyl) pyridotriazolopyrimidines: In Vitro and Molecular Docking Studies
Volume: 20
Issue: 14
Author(s): Hatem A. Abuelizz, El Hassane Anouar, Mohamed Marzouk, Mizaton H. Hasan, Siti R. Saleh, Adi Ahudhaif, Khalid A. Alburikan and Rashad Al-Salahi*
Affiliation:
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451,Saudi Arabia
Keywords:
Pyridotriazolopyrimidine, tyrosinase inhibition, cytotoxicity, molecular docking, HepG2, MCF-7.
Abstract:
Background: The use of tyrosinase has confirmed to be the best means of recognizing safe, effective,
and potent tyrosinase inhibitors for whitening skin. Twenty-four 2-phenoxy(thiomethyl)pyridotriazolopyrimidines
were synthesized and characterized in our previous studies.
Objective: The present work aimed to evaluate their cytotoxicity against HepG2 (hepatocellular carcinoma),
A549 (pulmonary adenocarcinoma), MCF-7 (breast adenocarcinoma) and WRL 68 (embryonic liver) cell lines.
Methods: MTT assay was employed to investigate the cytotoxicity, and a tyrosinase inhibitor screening kit was
used to evaluate the Tyrosinase (TYR) inhibitory activity of the targets.
Results: The tested compounds exhibited no considerable cytotoxicity, and nine of them were selected for
a tyrosinase inhibitory test. Compounds 2b, 2m, and 5a showed good inhibitory percentages against TYR
compared to that of kojic acid (reference substance). Molecular docking was performed to rationalize the
Structure-Activity Relationship (SAR) of the target pyridotriazolopyrimidines and analyze the binding between
the docked-selected compounds and the amino acid residues in the active site of tyrosinase.
Conclusion: The target pyridotriazolopyrimidines were identified as a new class of tyrosinase inhibitors.