Niesen Sonja, Göttel Celina, Becker Hanna, Bakuradze Tamara, Winterhalter Peter, Richling Elke
Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstraße 20, D-38106 Braunschweig, Germany.
Division of Food Chemistry and Toxicology, Department of Chemistry, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany.
Foods. 2022 Feb 16;11(4):570. doi: 10.3390/foods11040570.
Polyphenols show a spectrum of bioactive effects, including an influence on lipid metabolism. In this study, we performed activity-guided fractionations of black chokeberry (aronia), cranberry, and pomegranate extracts to identify the biologically active compounds. The extracts were prepared from fruit juice concentrates with the adsorbent resin Amberlite XAD-7 and were separated into a copigment and an anthocyanin fraction, followed by fractionation into a polymer and monomeric fraction by means of hexane precipitation. For further fractionation of the cranberry and pomegranate copigment fractions, high-performance countercurrent chromatography (HPCCC) was used. The compounds in each fraction were identified by high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS), and the quantification was performed by ultra high-performance liquid chromatography-diode array detector (UHPLC-DAD) analyses. Each of the (sub-)fractions was tested in three in vitro assays: phosphodiesterase 3B (PDE) activity, lipid accumulation, and lipolysis in 3T3-L1 cells. The results showed that various fractions and subfractions can inhibit lipid accumulation and PDE activity as well as increase lipolysis, particularly copigments. Overall, our results indicate an influence of polyphenol-rich (sub-)fractions on the lipid metabolism.
多酚具有一系列生物活性作用,包括对脂质代谢的影响。在本研究中,我们对黑接骨木莓(黑果腺肋花楸)、蔓越莓和石榴提取物进行了活性导向分级分离,以鉴定生物活性化合物。提取物由果汁浓缩物与吸附树脂Amberlite XAD - 7制备,先分离为共色素和花青素级分,然后通过己烷沉淀进一步分离为聚合物级分和单体级分。对于蔓越莓和石榴共色素级分的进一步分级分离,采用了高效逆流色谱法(HPCCC)。通过高效液相色谱/电喷雾电离串联质谱法(HPLC - ESI - MS/MS)鉴定各馏分中的化合物,并通过超高效液相色谱 - 二极管阵列检测器(UHPLC - DAD)分析进行定量。每个(亚)馏分在三种体外试验中进行测试:3T3 - L1细胞中的磷酸二酯酶3B(PDE)活性、脂质积累和脂肪分解。结果表明,各种馏分和亚馏分可抑制脂质积累和PDE活性,并增加脂肪分解,尤其是共色素。总体而言,我们的结果表明富含多酚的(亚)馏分对脂质代谢有影响。