Studies on the antioxidant activity of some chromonylrhodanine derivatives.
Fifteen chromonylrhodamine derivatives (CRs) were synthesized and the antioxidant activity levels were evaluated for the first time. The antioxidant activity potencies of these chromone derivatives were evaluated towards superoxide anion radicals, hydroxyl radicals and 2,2-diphenyl-1-picrylhydrazyl radicals. Also, the total antioxidant capacity of the tested compounds was measured using the ferric-ferrozine assay. The antioxidant activities were investigated using a chemiluminescence (CL) assay, spectrophotometry measurements, direct electron paramagnetic resonance (EPR) and the EPR spin-trapping technique. The 5,5-dimethyl- 1-pyrroline-1-oxide (DMPO) was applied as spin trap. Eleven of the 15 chromone compounds exhibited a decrease in the CL accompanying the superoxide anion radical produced in anhydrous dimethylsulfoxide (DMSO), ranging from 71-94% at concentration of 1 mmol /L; four of these compounds enhanced light emission in the range 231-672%. Similarly, these compounds caused 28-58% inhibition in the intensity of the DMPO-OOH radical EPR signal and the DMPO-OH radical (from 12-48%). Furthermore, three of these compounds showed very good antioxidant response towards the DPPH radical (EC50 : 0.51-0.56 µmol/L) and the high reduction potentials. These findings demonstrate that the chromone compounds tested may be considered as effective free radicals scavengers, a finding that is of great pharmacological importance.
Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów 48/49, 70-311, Szczecin, Poland.
Irena
I
Kruk
Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów 48/49, 70-311, Szczecin, Poland.
Teresa
T
Piechowska
Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów 48/49, 70-311, Szczecin, Poland.
Paweł
P
Berczyński
Department of History of Medicine and Medical Ethics, Pomeranian Medical University, Rybacka 1, 70-204, Szczecin, Poland.
Aleksandra
A
Kładna
Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, 06100, Tandoğan, Ankara, Turkey.
Oya
O
Bozdağ-Dündar
Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, 06100, Tandoğan, Ankara, Turkey.
Meltem
M
Ceylan-Unlusoy
Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Dokki, Cairo, 12311, Egypt.
Hassan Y
HY
Aboul-Enein
D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000737:chemistry; D002867:Chromones / Q000737:chemistry*; D003497:Cyclic N-Oxides / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D016166:Free Radical Scavengers / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D007004:Hypoglycemic Agents / Q000737:chemistry / Q000494:pharmacology; D008163:Luminescent Measurements; D010851:Picrates / Q000737:chemistry; D012236:Rhodanine / Q000737:chemistry*; D013481:Superoxides / Q000737:chemistry
D000975:Antioxidants; D001713:Biphenyl Compounds; D002867:Chromones; D003497:Cyclic N-Oxides; D016166:Free Radical Scavengers; D007004:Hypoglycemic Agents; D010851:Picrates; D013481:Superoxides; D017665:Hydroxyl Radical; C069977:2,2-dimethyl-5-hydroxy-1-pyrrolidinyloxy; D012236:Rhodanine; C055956:5,5-dimethyl-5-hydroperoxy-1-pyrrolidinyloxy; C004931:1,1-diphenyl-2-picrylhydrazyl
Chemiluminescence; Chromonylrhodamine derivatives; EPR study; Radical scavenging activity