Evaluation studies of persimmon plant ( Diospyros kaki ) for physiological benefits and bioaccessibility of antioxidants by in vitro simulated gastrointestinal digestion

Abstract

III.5. EVALUATION STUDIES OF PERSIMMON PLANT (DIOSPYROS KAKI) FOR PHYSIOLOGICAL BENEFITS AND BIOACCESSIBILITY OF ANTIOXIDANTS BY IN VITRO SIMULATED GASTROINTESTINAL DIGESTIONMartínez-Las Heras, R., Pinazo, A., Heredia, A., Andrés, A. Food Chemistry 214: 478-485 (2017) ABSTRACTThis study aims to analyze the antioxidant benefits from persimmon leaf tea, fruit and fibres taking into account their changes along gastrointestinal digestion. The evolution of polyphenols, flavonoids and antioxidant capacity was studied using the recent harmonized in vitro protocol published by Minekus et al. (2014). The digestion was performed with and without digestive enzymes. Results showed aqueous leaf extract was richer in antioxidants than the fruit or the extracted fibres. Nevertheless, persimmon-leaf antioxidants were more sensitive to the digestive environment. In general, the oral conditions greatly affected the antioxidants, while gastric digestion led to slight additional losses. The intestinal step enhanced polyphenols and flavonoids solubility coming from the fruit and fibres. Additionally, the presence of digestive enzymes positively contributed to antioxidant release throughout digestion. Finally, the bioaccesibility of polyphenols, flavonoids and antioxidant activity of persimmon fruit were 1.4, 1.0 and 3.8 times higher than in aqueous leaf extract.

Antioxidant activities and phenolic compounds in fruits of various genotypes of American persimmon (Diospyros virginiana L.) [pdf]

“…Our results compared favorably with previous studies on Diospyros kaki L. (Chen et al, 2008;Ercisli et al, 2008;Heras et al, 2017;Oksuz et al, 2015;Pu et al, 2013), and showed similar antioxidant activity. Chen et al (2008) reported that the antioxidant Each value represents the mean of three independent experiments (±SD) Grygorieva, O., Kucharska, A.…”

Antioxidant activities and phenolic compounds in fruits of various genotypes of American persimmon (Diospyros virginiana L.)

“…Our results compared favorably with previous studies on Diospyros kaki L. (Chen et al, 2008;Ercisli et al, 2008;Heras et al, 2017;Oksuz et al, 2015;Pu et al, 2013), and showed similar antioxidant activity. Chen et al (2008) reported that the antioxidant Each value represents the mean of three independent experiments (±SD) .…”

The Influence of In Vitro Gastrointestinal Digestion on the Anticancer Activity of Manuka Honey

“…For example, in the seeds of white grapes, the decrease in the value of the TPC was almost three times compared to the undigested seeds, and the trend was more or less similar in the pomace faction [17]. A clear decrease in TPC after gastrointestinal digestion was also observed in extracts of pomegranate [18], papaya, jackfruit [19], and in fresh persimmons [20]. However, there are some studies in which there are no clear differences between the TPC of the undigested and digested samples [16,21].…”