Naslov
Inhibition of α-glucosidase by polyphenols present in traditional apples varieties

Autori
Ištuk, Jozo ; Jakobek, Lidija ; Strelec, Ivica

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 18 Ružička days Today Science - Tomorrow Industry / Jukić, Ante ; Ocelić Bulatović, Vesna ; Kučić Grgić, Dajana ; - Zagreb : Osijek : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI) ; Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku, 2021, 94-103

Skup
18. Ružičkini dani "Danas znanost - sutra industrija"

Mjesto i datum
Vukovar, Hrvatska, 16.09.2020. - 18.09.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
α-glucosidase ; inhibition ; polyphenols ; apple ;

Sažetak
This work aimed to evaluate polyphenols from two traditional apple varieties as a-glucosidase inhibitors. Polyphenols were extracted from the flesh and skin of two traditional apple varieties ('Božićnica' and 'Batulenka') by using ultrasonic- assisted extraction. Total polyphenols in extracts were determined by the spectrophotometric Folin- Ciocalteu method, expressed as gallic acid equivalents (GAE). The α-glucosidase activity was evaluated based on the spectrophotometric determination of p-nitrophenol (pNP) released from p-nitrophenyl- α-D-glucopyranoside (p-NPG) substrate by the action of the enzyme. To inhibit enzyme activity, various polyphenol concentrations were added to the reaction mixture. IC50 value was calculated (concentration of polyphenols that gives 50 % inhibition). 'Božićnica' and 'Batulenka' contained 337.24 and 202.17 mg GAE/kg in the flesh and 2132.91 and 824.43 mg GAE/kg in the peel, respectively. Polyphenols inhibited a- glucosidase activity and inhibition reached a steady state. IC50 values, expressed as μg of gallic acid equivalents (GAE) per mL of reaction solution, of the flesh of 'Batulenka' and 'Božićnica' were 1.69 and 1.47, respectively. Peel showed similar IC50 values (1.07, and 0.33 μg GAE/mL, for the peel of 'Batulenka' and 'Božićnica', respectively). These results suggest that polyphenols from the flesh and skin of traditional apple varieties are potent inhibitors of α-glucosidase activity

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA