Fractionation of plant bioactives from black carrots (Daucus carota subspecies sativus varietas atrorubens Alef.) by adsorptive membrane chromatography and analysis of their potential anti-diabetic activity

verfasst von

T. Esatbeyoglu, M. Rodríguez-Werner, A. Schlösser, M. Liehr, I. Ipharraguerre, P. Winterhalter, G. Rimbach

Abstract

Black and purple carrots have attracted interest as colored extracts for coloring food due to their high content of anthocyanins. This study aimed to investigate the polyphenol composition of black carrots. Particularly, the identification and quantification of phenolic compounds of the variety Deep Purple carrot (DPC), which presents a very dark color, was performed by HPLC-PDA and HPLC-ESI-MS

ⁿ analyses. The separation of polyphenols from a DPC XAD-7 extract into an anthocyanin fraction (AF) and co-pigment fraction (CF; primarily phenolic acids) was carried out by membrane chromatography. Furthermore, possible anti-diabetic effects of the DPC XAD-7 extract and its AF and CF were determined. DPC samples (XAD-7, CF, and AF) inhibited α-amylase and α-glucosidase in a dose-dependent manner. Moreover, DPC XAD-7 and chlorogenic acid, but not DPC CF and DPC AF, caused a moderate inhibition of intestinal glucose uptake in Caco-2 cells. However, DPC samples did not affect glucagon-like peptide-1 (GLP-1) secretion and dipeptidyl peptidase IV (DPP-4) activity. Overall, DPC exhibits an inhibitory effect on α-amylase and α-glucosidase activity and on cellular glucose uptake indicating potential anti-diabetic properties.

Organisationseinheit(en)

Institut für Lebensmittelwissenschaft und Humanernährung
Molekulare Lebensmittelchemie und -entwicklung

Typ

Artikel

Journal

Journal of Agricultural and Food Chemistry

Band

Seiten

5901-5908

Anzahl der Seiten

ISSN

0021-8561

Publikationsdatum

27.07.2016

Publikationsstatus

Veröffentlicht

Peer-reviewed

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Agrar- und Biowissenschaften

Ziele für nachhaltige Entwicklung

SDG 3 – Gute Gesundheit und Wohlergehen

Elektronische Version(en)

https://doi.org/10.1021/acs.jafc.6b02292 (Zugang: Geschlossen)