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Texto completo SciELO Chile
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Id: biblio-840312
Autor: Aminjafari, Akram; Miroliaei, Mehran; Angelova, Violina T; Emamzadeh, Rahman; Djukic, Mirjana M; Djuric, Ana; Saso, Luciano.
Título: Antioxidant activity and protective role on protein glycation of synthetic aminocoumarins
Fonte: Electron. j. biotechnol;19(6):43-48, Nov. 2016. ilus.
Idioma: en.
Projeto: Iran National Science Foundation (INSF). Research Council of University of Isfahan and Ministry of Education and Science, Republic of Serbia.
Resumo: Background: Synthesized aminocoumarins are heterocyclic compounds possessing potential for the treatment of insulin-dependent diabetes mellitus with unexplored anti-glycative action. Results: In this study 4-aminocoumarin derivatives (4-ACDs) were evaluated in vitro for antiglycation (AG) activities by using the human serum albumin (HSA)/glucose system, for 8 weeks of incubation. The glycation and conformational alteration of HSA in the presence of the tested compounds were evaluated by Congo red assay, fluorescence and circular dichroism spectroscopy. The antioxidant (AO) capacity were also tested by four different assays including: DPPH (2,2'-diphenyl-1-picrylhydrazyl radical), ABTS (2,2-azinobis (3-ethylbenzothiazoline-6-sulphonate) diammonium salt), FRAP (ferric reducing antioxidant power) and β-carotene-linoleic acid assay. The tested compounds showed AG and AO effects. The intensity of the accomplished AO potential is related to the type of the used assay. Significant alterations in the secondary (monitored by CD spectropolarimetry) and tertiary structure (assessed by spectrofluorimetry) of HSA upon glycation were mitigated by the 4-ACDs, suggesting their suppressive role in the late stage (post-Amadori) of the HSA glycation. Conclusions: By the analogues, in vitro ascertained AO and AG properties of 4-ACD may be recognized as rationale for their protective role against oxidative changes of proteins, thereby precluding diabetic complications in humans.
Descritores: Aminocumarinas/farmacologia
Glicosilação/efeitos dos fármacos
Diabetes Mellitus Tipo 1
Técnicas In Vitro
Análise Espectral/métodos
Responsável: CL1.1 - Biblioteca Central

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