Premium
Three ‐(pyridin‐2‐yl)‐2‐(pyridin‐2‐ylimino)thiazolidin‐4‐one as a novel inhibitor of cerebral MAO‐B activity with antioxidant properties and low toxicity potential
Author(s) -
Carraro Junior Luiz Roberto,
Alves Amália Gonçalves,
Rech Taís da Silva Teixeira,
Campos Júnior José Coan,
Siqueira Geonir Machado,
Cunico Wilson,
Brüning César Augusto,
Bortolatto Cristiani Folharini
Publication year - 2021
Publication title -
journal of biochemical and molecular toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.526
H-Index - 58
eISSN - 1099-0461
pISSN - 1095-6670
DOI - 10.1002/jbt.22833
Subject(s) - chemistry , antioxidant , dpph , abts , toxicity , pharmacology , biochemistry , neuroprotection , superoxide dismutase , monoamine oxidase , oxidative stress , monoamine oxidase b , enzyme , organic chemistry , medicine
Some brain diseases are associated with oxidative stress and altered monoamine oxidase (MAO) activity. The objective of this study was to evaluate the antioxidant and neuroprotective actions through MAO inhibition of 3‐(pyridin‐2‐yl)‐2‐(pyridine‐2‐ylimino) thiazolidin‐4‐one (PPIT, a synthetic molecule containing a thiazolidinone nucleus), as well as its effects on toxicity parameters in Swiss female mice. Five in vitro assays were carried out to verify the PPIT antioxidant capacity: protein carbonylation (PC), 2,2'‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid) (ABTS), 1,1‐diphenyl‐2‐picryl‐hydrazil (DPPH), ferric ion (Fe 3+ ) reducing antioxidant power (FRAP), and superoxide dismutase (SOD)‐like activity. The results showed that PPIT reduced the level of PC in the homogenate of the brain. This compound did not demonstrate SOD mimetic activity, but it acted as a free radical scavenger (ABTS and DPPH) and exhibited reducing activity in the FRAP assay. In addition, the effects of PPIT on cerebral MAO activity (MAO‐A and B isoforms) were investigated in vitro. Our data revealed inhibition of the MAO‐B activity by PPIT with no effects on MAO‐A. Lastly, an acute oral toxicity test was conducted in mice. No changes in food intake, body weight, and biochemical markers of kidney and liver damage were detected in mice treated with a high dose of PPIT (300 mg/kg). In conclusion, the present study demonstrated that PPIT exhibits antioxidant activity and selectively inhibits the MAO‐B isoform without causing apparent toxicity. These findings suggest PPIT as a potential therapeutic candidate to be tested in preclinical models of brain diseases involving perturbations of MAO‐B activity and redox status.