Naslov
Effects of conjugation metabolism on radical scavenging and transport properties of quercetin – In silico study

Autori
Stepanić, Višnja ; Matić, Sara ; Amić, Ana ; Lučić, Bono ; Milenković , Dejan ; Marković, Zoran

Izvornik
Journal of molecular graphics & modelling (1093-3263) 86 (2019); 278-285

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quercetin ; conjugation metabolism ; radical scavenging ; disproportionation ; serum albumin

Sažetak
Quercetin (Q) is a natural polyphenol with high radical scavenging capacity, but low in vivo bioavailability. It is extensively transformed by host phase II metabolism and microbiota. Herein, effects of major in vitro and in vivo conjugation transformations of Q on its radical scavenging capacity and human serum albumin (HSA) binding were studied by using appropriate computational approaches, DFT (U)B3LYP/6-31+G(d, p) and molecular docking, respectively. With regard to radical scavenging capacity of Q, conjugation transformations generally reduce its antioxidant capacity including regeneration efficiency through disproportionation of an intermediate radical species since these structural modifications occur mainly at its radical scavenging –OH groups. They were also found to alter dominant radical scavenging mechanism in a specific way dependent upon conjugation type and site. Concerning distribution by HSA, binding to this main plasma transporter protein may not be dominant transport mechanism for Q and its metabolites in vivo. Like Q aglycon, most of its metabolites are bound non-specifically at multiple binding sites of HSA, with relatively weak affinities. Only sulfo-conjugates including plasma abundant isomer Q-3’-O-SO3–, were predicted to bind specifically in warfarin-like manner, but also with relatively low binding affinity.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija, Interdisciplinarne prirodne znanosti

Napomena
The Scientific Centre of Excellence for Marine Bioprospecting BioProCro (Competitiveness and Cohesion Operational Program European Regional Development Fund KK.01.1.1.01)

POVEZANOST RADA