Quenching activity of carnosine derivatives towards reactive carbonyl species: Focus on αâ(methylglyoxal) and βâ(malondialdehyde) dicarbonyls
Articolo
Data di Pubblicazione:
2017
Citazione:
Quenching activity of carnosine derivatives towards reactive carbonyl species: Focus on αâ (methylglyoxal) and βâ (malondialdehyde) dicarbonyls / G. Vistoli, M. Colzani, A. Mazzolari, E. Gilardoni, C. Rivaletto, M. Carini, G. Aldini. - In: BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS. - ISSN 0006-291X. - 492:3(2017), pp. 487-492. [10.1016/j.bbrc.2017.08.069]
Abstract:
The study combines HPLC-based with MS-based competitive analyses to evaluate the quenching activity of a set of carnosine derivatives towards methylglyoxal (MGO) and malondialdehyde (MDA) chosen as representative of αâ and βâdicarbonyls, respectively. The obtained results underline that these derivatives are moderately reactive towards MDA with which they form the corresponding N-propenal adduct via Michael addition. In contrast they proved a rather poor quenching activity towards MGO with which they can condense to give MOLD-like adducts through a concerted mechanism involving more quenchers molecules. Even though both quenching mechanisms involve the amino group in its neutral form, in silico studies revealed that the reported reactivity values depend on different stereo-electronic parameters which are reflected in the different observed quenching mechanism. Finally, the MGO quenching reactivity and the unselective (and unwanted) pyridoxal quenching are found to be influenced by the same parameters thus rationalizing the known difficulty in the design of potent and selective quenchers towards β-dicarbonyls.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Canosine; Reactive carbonyl species; Sequestering agents
Elenco autori:
G. Vistoli, M. Colzani, A. Mazzolari, E. Gilardoni, C. Rivaletto, M. Carini, G. Aldini
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