1. Attenuation effect of a polysaccharide from large leaf yellow tea by activating autophagy.
- Author
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Chen, Hao, Wang, Zhuang, Gong, Lei, Chen, Jielin, Huang, Yuzhe, Guo, Wenqiang, Zhang, Qiang, Li, Yong, Bao, Guanhu, Li, Daxiang, and Chen, Yan
- Subjects
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POLYSACCHARIDES , *AUTOPHAGY , *ANTINEOPLASTIC agents , *GUT microbiome , *TEA , *IRINOTECAN , *EPIGALLOCATECHIN gallate - Abstract
Chemotherapy, the most common class of anticancer drugs, is considerably limited owing to its adverse side effects. In this study, we aimed to evaluate the protective effect and mechanism of action of large-leaf yellow tea polysaccharides (ULYTP-1, 1.29 × 104 Da) against chemotherapeutic 5-fluorouracil (5-Fu). Structural characterisation revealed that ULYTP-1 was a β-galactopyranouronic acid. Furthermore, ULYTP-1 promoted autolysosome formation, activating autophagy and reducing the oxidative stress and inflammation caused by 5-Fu. Our in vivo study of 4 T1 tumour-bearing mice revealed that ULYTP-1 also attenuated 5-Fu toxicity through modulation of the gut microbiota. Moreover, ULYTP-1 effectively protected immune organs and the liver from 5-Fu toxicity, while promoting its tumour-inhibitory properties. The current findings provide a new strategy for optimising chemotherapy regimens in the clinic. [Display omitted] • Polysaccharide ULYTP-1 was extracted from large-leaf yellow tea. • ULYTP-1 is a β-galactopyranouronic acid with a spongy steric configuration. • ULYTP-1 activates autophagy to alleviate 5-fluorouracil-induced liver injury. • ULYTP-1 alleviated gut dysbiosis in 4 T1 tumour-bearing mice. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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