Major of Food & Nutrition, Division of Applied Food System, Seoul Women's University, Seoul 01797, Republic of Korea.
Major of Food & Nutrition, Division of Applied Food System, Seoul Women's University, Seoul 01797, Republic of Korea.
Food Chem. 2018 Nov 30;267:157-162. doi: 10.1016/j.foodchem.2018.02.109. Epub 2018 Feb 21.
The stability of anthocyanins in bokbunja (Rubus occidentalis L.) extract was investigated using an in vitro simulated gastrointestinal digestion. Ethanolic extract from bokbunja was digested with pepsin/HCl for 2 h at 37 °C, followed by pancreatin/bile salts for 2 h at 37 °C. Four anthocyanins including cyanidin-3-glucoside, cyanidin-3-sambubioside, cyanidin-3-xylosylrutinoside and cyanidin-rutinoside were identified in the bokbunja extract. The total anthocyanin content of bokbunja was 3.76 mg cyanidin-3-glucoside equivalents/g fresh weight (FW). Gastric digestion had no significant effect on anthocyanins. However, intestinal digestion substantially decreased anthocyanins up to 1.70 mg/g FW, corresponding to 45% of that in the bokbunja extract. This indicates that about half of anthocyanins can reach an intestinal tract. In addition, a new compound comprised of cyanidin-3-glucosdie, catechin and acetaldehyde in a separated study was observed after in vitro gastrointestinal digestion. This shows that anthocyanins could be transformed into other compounds with different biochemical properties.
采用体外模拟胃肠道消化法研究了桑果（Rubus occidentalis L.）提取物中花色苷的稳定性。用胃蛋白酶/盐酸在 37°C 下消化桑果的乙醇提取物 2 h，然后用胰酶/胆汁盐在 37°C 下消化 2 h。在桑果提取物中鉴定出 4 种花色苷，包括矢车菊素-3-葡萄糖苷、矢车菊素-3-山梨糖苷、矢车菊素-3-木糖苷和矢车菊素-芦丁糖苷。桑果中总花色苷含量为 3.76mg 矢车菊素-3-葡萄糖苷当量/g 鲜重（FW）。胃消化对花色苷没有显著影响。然而，肠消化会使花色苷大大减少，至 1.70mg/g FW，相当于桑果提取物中花色苷含量的 45%。这表明约一半的花色苷可以到达肠道。此外，在另一项体外胃肠道消化研究中观察到一种由矢车菊素-3-葡萄糖苷、儿茶素和乙醛组成的新化合物。这表明花色苷可能转化为具有不同生化特性的其他化合物。
