College of Food Science, South China Agricultural University, Guangzhou 510642, China.
College of Food Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agricultural, 510642, China.
Food Chem. 2023 Mar 30;405(Pt A):134855. doi: 10.1016/j.foodchem.2022.134855. Epub 2022 Nov 6.
Characterization and bioactivity of A-type procyanidins was investigated in litchi fruitlet (LF) at different stages and mature pericarp (MP) of 5 litchi cultivars. The content of total phenols in LFs was higher than that of MP and showed good antioxidant activity. Eleven procyanidins were identified in samples, including procyanidin A, procyanidin A, and 1 dimer, 2 trimers, and 1 tetramer of A-type procyanidin. Also, A-type procyanidin could stably exist in LFs stage, but declined substantially after maturity, which was about 1.45 - 3.56 times than mature pericarp. In addition, the second stage of LFs showed strong anti-inflammatory and anti-proliferative activities, in which monomer and A-type procyanidin trimers in LFs were significantly correlated with antioxidant (r > 0.72; p < 0.01) and anti-inflammatory (r = 0.53; p < 0.05) activities, respectively. Therefore, litchi in LF stage could be a good source of A-type oligomer procyanidins which had good application value.
对不同发育阶段荔枝幼果（LF）和 5 个荔枝品种成熟果皮（MP）中的 A 型原花青素的特性和生物活性进行了研究。LF 中的总酚含量高于 MP，且具有良好的抗氧化活性。在样品中鉴定出 11 种原花青素，包括原花青素 A、原花青素 A2 和 1 种 A 型原花青素二聚体、2 种三聚体和 1 种四聚体。此外，A 型原花青素可在 LF 阶段稳定存在，但在成熟后显著下降，约为成熟果皮的 1.45-3.56 倍。此外，LF 的第二阶段表现出较强的抗炎和抗增殖活性，其中 LF 中的单体和 A 型原花青素三聚体与抗氧化（r>0.72；p<0.01）和抗炎（r=0.53；p<0.05）活性显著相关。因此，LF 期的荔枝可能是 A 型低聚原花青素的良好来源，具有良好的应用价值。
Zotero 插件