Abstract
In this study, the whole proteins of Spirulina (Arthrospira) platensis were extracted, hydrolysis with three proteases (trypsin, alcalase and papain) was performed, and gel filtration chromatography was employed to separate hydrolysates. Totally, 15 polypeptides were isolated, which showed anti-proliferation activities on five cancer cells (HepG-2, MCF-7, SGC-7901, A549 and HT-29), with the IC50 values between <31.25 and 336.57 μg mL(-1). Moreover, a new peptide YGFVMPRSGLWFR was identified from papain-digested hydrolysates. It also exhibited inhibitory activities on cancer cells, and the best activity was observed on A549 cancer cells (IC50 values 104.05 μg mL(-1)). In other words, these polypeptides exhibited anti-proliferation activities on cancer cells, and low toxicity or stimulatory activity on normal cells, suggesting that they are promising ingredients in food and pharmaceutical applications.
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