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生物相容性抗菌丝胶蛋白-铜纳米酶的制备与性能研究

Preparation and properties of biocompatible antibacterial sericin-copper nanozymes

期刊信息

合肥工业大学(自然科学版),2026年6月,第49卷第6期:795-800

DOI: 10.3969/j.issn.1003-5060.2026.06.011

作者信息

翟雅莉,杨庆华,姜海犇

(合肥工业大学食品与生物工程学院,安徽合肥230601)

摘要和关键词

摘要: 文章以 Cu(Ⅱ) 螯合改性蚕丝丝胶蛋白(silk sericin,SS),制备一种具有类过氧化物酶(POD)活性的 Cu@SS,以实现丝胶蛋白的再利用;并研究 Cu(Ⅱ) 对丝胶蛋白结构的影响,以及 Cu@SS 纳米酶的催化性能、生物相容性和抗菌活性。结果表明,Cu@SS 纳米酶具有类 POD 活性,以 3,3',5,5'-四甲基联苯胺(TMB)和过氧化氢( $ H_{2}O_{2} $)为底物,Cu@SS 催化反应的米氏常数( $ K_{m} $)分别为 $ 1.965 \times 10^{-4} $、 $ 1.238 \times 10^{-3} $ mol/L;细胞实验结果表明,Cu@SS 纳米酶具有良好的生物相容性,对巨噬细胞 RAW 264.7 无细胞毒性。此外,在 $ H_{2}O_{2} $ 存在下,Cu@SS 纳米酶可以使大肠杆菌(Escherichia coli)的相对存活率下降至 45%。因此,Cu@SS 纳米酶具有良好的生物相容性和良好的抗菌性能。

关键词: 蚕丝丝胶蛋白(SS);Cu(Ⅱ)纳米酶;类过氧化物酶(POD)活性;生物相容性;抗菌性能

Authors

ZHAI Yali, YANG Qinghua, JIANG Haiben

(School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China)

Abstract and Keywords

Abstract: In this study, silk sericin(SS) was modified by Cu(II) chelation to prepare Cu@SS with peroxidase (POD)-like activity for the reuse of sericin. The effect of Cu(II) on the structure of sericin and the catalytic performance, biocompatibility and antibacterial activity of Cu@SS nanozymes were studied. The results showed that Cu@SS nanozymes had POD-like activity, and their Michaelis constants ( $ K_{m} $) for 3,3',5,5'-tetramethylbenzidine(TMB) and hydrogen peroxide( $ H_{2}O_{2} $) were $ 1.965 \times 10^{-4} $ mol/L and $ 1.238 \times 10^{-3} $ mol/L, respectively. Cell experiments showed that Cu@SS nanozymes had good biocompatibility and no cytotoxicity against macrophage RAW 264.7 cells. Furthermore, Cu@SS nanozymes reduced the relative bacterial viability of Escherichia coli to 45% in the presence of $ H_{2}O_{2} $. Therefore, Cu@SS nanozyme is a good biocompatible material with favorable antibacterial properties.

Keywords: silk sericin(SS); Cu(Ⅱ) nanozymes; peroxidase(POD)-like activity; biocompatibility; antibacterial property

基金信息

材料复合新技术国家重点实验室开放基金资助项目(PA2021GKSK0010);合肥工业大学产学研校企合作资助项目(W2021JSKF0657)

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