A comparative evaluation of the composition and antioxidant activity of free and bound polyphenols in sugarcane tips

IF 10.4 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2025-01-15 Epub Date: 2024-10-02 DOI:10.1016/j.foodchem.2024.141510

Qiqi Huang , Tongquan Wen , Taowen Fang , Houyuan Lao , Xiaohan Zhou , Tengqing Wei , Yiwen Luo , Caifeng Xie , Zhi Huang , Kai Li

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Abstract

The sugarcane tip is abundant in phenolic compounds. Previous studies have concentrated on the effects of free polyphenols, while bound polyphenols were overlooked. In this study, the content of bound polyphenols (SPB) (31.9 ± 0.9 mg GAE/g DW) was significantly higher than free polyphenols (SPF) (3.4 ± 0.1 mg GAE/g DW). A total of 44 free and 31 bound phenolics were identified by the UPLC-EIS-QTOF-MS/MS. Moreover, the antioxidant activity of SPB was more pronounced, as evidenced by its higher ABTS⁺ and DPPH scavenging rates than SPF, which was attributed to the higher tannin content. Furthermore, at all tested concentrations (100 and 200 μg/mL), SPB significantly enhanced the survival and antioxidant enzyme activity of Caenorhabditis elegans (C. elegans), while concurrently reducing ROS levels. High concentrations of SPB even exhibited antioxidant activity comparable to Vitamin C (Vc). The collective findings strongly indicate that SPB holds great potential as an effective antioxidant.

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甘蔗梢中游离和结合多酚成分及抗氧化活性的比较评估

甘蔗顶端含有丰富的酚类化合物。以往的研究主要集中在游离多酚的影响上，而结合多酚则被忽视了。在本研究中，结合多酚（SPB）（31.9 ± 0.9 mg GAE/g DW）的含量明显高于游离多酚（SPF）（3.4 ± 0.1 mg GAE/g DW）。UPLC-EIS-QTOF-MS/MS 共鉴定出 44 种游离酚和 31 种结合酚。此外，与 SPF 相比，SPB 的 ABTS+ 和 DPPH 清除率更高，这表明 SPB 的抗氧化活性更强，这归因于其单宁含量更高。此外，在所有测试浓度（100 和 200 μg/mL）下，SPB 都能显著提高秀丽隐杆线虫（C. elegans）的存活率和抗氧化酶活性，同时降低 ROS 水平。高浓度的 SPB 甚至表现出与维生素 C（Vc）相当的抗氧化活性。这些研究结果有力地表明，SPB 作为一种有效的抗氧化剂具有巨大的潜力。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.