Journal
OXIDATIVE MEDICINE AND CELLULAR LONGEVITY
Volume 2021, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2021/8842926
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Funding
- Infinitus (China) Company Ltd
- Wellcome Trust
- UK Medical Research Council (MRC)
- Alzheimer's Research UK (ARUK)
- 111 Project [B17018]
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Sea cucumber peptides exhibit antioxidant activity, alleviating oxidative stress at both cellular and organism levels, and may be attractive as nutritional supplements for healthy ageing.
Oxidative stress results when the production of oxidants outweighs the capacity of the antioxidant defence mechanisms. This can lead to pathological conditions including cancer and neurodegeneration. Consequently, there is considerable interest in compounds with antioxidant activity, including those from natural sources. Here, we characterise the antioxidant activity of three novel peptides identified in protein hydrolysates from the sea cucumber Apostichopus japonicus. Under oxidative stress conditions, synthetic versions of the sea cucumber peptides significantly compensate for glutathione depletion, decrease mitochondrial superoxide levels, and alleviate mitophagy in human neuroblastoma cells. Moreover, orally supplied peptides improve survival of the Caenorhabditis elegans after treatment with paraquat, the latter of which leads to the production of excessive oxidative stress. Thus, the sea cucumber peptides exhibit antioxidant activity at both the cellular and organism levels and might prove attractive as nutritional supplements for healthy ageing.
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