Molecular Biology Reports

, Volume 46, Issue 2, pp 2285–2292 | Cite as

Isoflavones prevent oxidative stress and inhibit the activity of the enzyme monoamine oxidase in vitro

  • Izaviany da Silva Schmitz
  • Larissa Finger Schaffer
  • Alcindo Busanello
  • Catiuscia Molz de Freitas
  • Roselei Fachinetto
  • Luis Ricardo PerozaEmail author
Original Article


Oxidative stress occurs due to an imbalance between antioxidant defenses and pro-oxidant agents in brain. This condition has been associated to the pathogenesis of several brain diseases; therefore, increasing the use of compounds that exert antioxidant activity. Thus, the objective of this study was to evaluate, in vitro, the effect of isoflavones in: (1) lipid peroxidation, catalase activity and thiol groups in the presence of pro-oxidants: sodium nitroprusside or Fe2+/EDTA complex in rat brain homogenates; (2) the activity of the enzyme monoamine oxidase (MAO). As a result, the isoflavones reduced lipid peroxidation in a manner dependent on the concentration and protected against the reduction of catalase activity as well as the induced thiol oxidation in brain tissue. In addition, isoflavones inhibited MAO activity (MAO-A and MAO-B). Taken together, our results showed that isoflavones avoided oxidative stress and decreased the MAO activity, suggesting a promissory use in the treatment of neurodegenerative diseases.


Oxidative stress Isoflavones Antioxidant Monoamine oxidase 



We acknowledge fellowships from CNPq (R.F.) and CAPES (L.F.S., A.B., C.M.F, L.R.P).


This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001, and CAPES/PROEX (23038.005848/2018-31; support number: 0737/2018). Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul – FAPERGS/Brazil (2080–2551/13-5-PqG-001/2013) and Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq/Brazil (475210/2013-1).

Compliance with ethical standards

Conflict of interest

Authors declare that they do not hold any conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Curso de BiomedicinaUniversidade Franciscana (UFN)Santa MariaBrazil
  2. 2.Programa de Pós-Graduação em FarmacologiaUniversidade Federal de Santa Maria (UFSM)Santa MariaBrazil
  3. 3.Programa de Pós-Graduação em Bioquímica ToxicológicaUniversidade Federal de Santa Maria (UFSM)Santa MariaBrazil
  4. 4.Mestrado em Ciências da Saúde e da VidaUniversidade Franciscana (UFN)Santa MariaBrazil

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