Wen Junren, Sui Yong, Shi Jianbin, Cai Sha, Xiong Tian, Cai Fang, Zhou Lei, Li Shuyi, Mei Xin
Key Laboratory of Agro-Products Cold Chain Logistics, Ministry of Agriculture and Rural Affairs, Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Agro-Product Processing Research Sub-Center of Hubei Innovation Center of Agriculture Science and Technology, Hubei Academy of Agricultural Science, Wuhan 430064, China.
College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Antioxidants (Basel). 2024 Apr 26;13(5):520. doi: 10.3390/antiox13050520.
The chemical composition discrepancies of five sweet potato leaves (SPLs) and their phenolic profile variations during in vitro digestion were investigated. The results indicated that Ecaishu No. 10 (EC10) provided better retention capacity for phenolic compounds after drying. Furthermore, polyphenols were progressively released from the matrix as the digestion process proceeded. The highest bioaccessibility of polyphenols was found in EC10 intestinal chyme at 48.47%. For its phenolic profile, 3-, 4-, and 5-monosubstituted caffeoyl quinic acids were 9.75%, 57.39%, and 79.37%, respectively, while 3,4-, 3,5-, and 4,5-disubstituted caffeoyl quinic acids were 6.55, 0.27 and 13.18%, respectively. In contrast, the 3,4-, 3,5-, 4,5-disubstituted caffeoylquinic acid in the intestinal fluid after dialysis bag treatment was 62.12%, 79.12%, and 62.98%, respectively, which resulted in relatively enhanced bioactivities (DPPH, 10.51 μmol Trolox/g; FRAP, 8.89 μmol Trolox/g; ORAC, 7.32 μmol Trolox/g; IC50 for α-amylase, 19.36 mg/g; IC50 for α-glucosidase, 25.21 mg/g). In summary, desirable phenolic acid release characteristics and bioactivity of EC10 were observed in this study, indicating that it has potential as a functional food ingredient, which is conducive to the exploitation of the sweet potato processing industry from a long-term perspective.
研究了五种红薯叶（SPL）的化学成分差异及其在体外消化过程中的酚类物质谱变化。结果表明，鄂菜薯10号（EC10）在干燥后对酚类化合物具有更好的保留能力。此外，随着消化过程的进行，多酚逐渐从基质中释放出来。在EC10肠糜中发现多酚的最高生物可及性为48.47%。就其酚类物质谱而言，3-、4-和5-单取代咖啡酰奎尼酸分别为9.75%、57.39%和79.37%，而3,4-、3,5-和4,5-二取代咖啡酰奎尼酸分别为6.55%、0.27%和13.18%。相比之下，透析袋处理后肠液中3,4-、3,5-、4,5-二取代咖啡酰奎尼酸分别为62.12%、79.12%和62.98%，这导致相对增强的生物活性（DPPH，10.51 μmol Trolox/g；FRAP，8.89 μmol Trolox/g；ORAC，7.32 μmol Trolox/g；α-淀粉酶的IC50，19.36 mg/g；α-葡萄糖苷酶的IC50，25.21 mg/g）。总之，本研究观察到EC10具有理想的酚酸释放特性和生物活性，表明它有作为功能性食品成分的潜力，从长远来看有利于红薯加工业的开发。
