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Phlorotannins: Novel Orally Administrated Bioactive Compounds That Induce Mitochondrial Dysfunction and Oxidative Stress in Cancer

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ANTIOXIDANTS
卷 12, 期 9, 页码 -

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MDPI
DOI: 10.3390/antiox12091734

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metabolism; antioxidants; pro-oxidants; phloroglucinol; encapsulation

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Mitochondrial dysfunction is a potential target for cancer therapy, and the use of phlorotannins, a type of polyphenol found in brown seaweeds, shows promise as antioxidants and anti-inflammatory and anti-tumorigenic agents. Dieckol and phloroglucinol, specific phlorotannins, promote mitochondrial depolarization and apoptosis, while suppressing pro-tumorigenic, -inflammatory, and -angiogenic signaling pathways. However, the instability of these compounds calls for encapsulation techniques for oral delivery.
Mitochondrial dysfunction is an interesting therapeutic target to help reduce cancer deaths, and the use of bioactive compounds has emerged as a novel and safe approach to solve this problem. Here, we discuss the information available related to phlorotannins, a type of polyphenol present in brown seaweeds that reportedly functions as antioxidants/pro-oxidants and anti-inflammatory and anti-tumorigenic agents. Specifically, available evidence indicates that dieckol and phloroglucinol promote mitochondrial membrane depolarization and mitochondria-dependent apoptosis. Phlorotannins also reduce pro-tumorigenic, -inflammatory, and -angiogenic signaling mechanisms involving RAS/MAPK/ERK, PI3K/Akt/mTOR, NF-kappa B, and VEGF. In doing so, they inhibit pathways that favor cancer development and progression. Unfortunately, these compounds are rather labile and, therefore, this review also summarizes approaches permitting the encapsulation of bioactive compounds, like phlorotannins, and their subsequent oral administration as novel and non-invasive therapeutic alternatives for cancer treatment.

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