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Purification and identification of intestinal mucosal cell proliferation-promoting peptides from Crassostrea hongkongensis

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Abstract

Oyster peptides, together with polysaccharides, were found to protect the intestinal mucosal barrier against the harmful effects of 5-FU chemotherapy on rats in our previous study. However, whether oyster (Crassostrea hongkongensis) peptide can promote intestinal epithelia cell proliferation and migration alone is unknown. In this paper, oyster tissue was hydrolyzed using pepsin, trypsin, papain, bromelain, neutrase, flavorzyme, and alcalase protease. Among the hydrolysates that produced by trypsin showed the highest promoting effect on intestinal epithelia cell (IEC-6) proliferation and was fractionated into three molecular weight ultra-filtrates of > 10, 10–5, and < 5 kDa. The 10–5 kDa ultra-filtrate showed the highest promoting effect on cell proliferation, at 146.16 ± 6.56% (0.16 mg/ml), and was subjected to further purification. Two oyster peptides (F3-1 and F3-2) were purified from the 5–10 kDa ultra-filtrate by SEC and RP-HPLC. Their molecular mass and amino acid sequences were identified as VAPEEHPVLL (MW, 1102.5872 Da) and SYELPDGQVITIGNER (MW, 1789.9247 Da) by MALDI–TOF–MS/MS. Peptides F3-1 and F3-2 exhibited 150.81 ± 12.34% (5 µg/ml) and 151.73 ± 12.28% (6.25 µg/ml) promoting effects on IEC-6 proliferation, respectively, and both peptides showed greater promoting effects than the positive control (proglumide) at the same concentration under LPS stimulation culture conditions. This study indicated that oyster peptides could serve as a potential source of a functional food constituent for intestinal epithelium protection.

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Acknowledgements

We thank Dr. Yongli Gao, Shikun Dai, and Xiangyu Qin (the Equipment Public Service Center, SCSIO.CAS) for assistance in the ultra-centrifuge and mass spectrometric analyses. Our work is supported by grants from National Key R&D Program of China (No. 2018YFC0311200), Natural Science Foundation of Guangdong Province, China (No. 2018A030313088, 2018A030313903, 2018A0303130144 and 2018A030313626), the Project of Public Science and Technology Research Funds Projects of Ocean (No. 201305018), Science and Technology Program of Guangzhou, China (201707010164), the Science and Technology Planning Project of Guangdong Province, China (Nos. 2013B090800002 and 2015B090904003) and Pearl River S&T Nova Program of Guangzhou (201710010095).

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Authors and Affiliations

  1. Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Meteria Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, No. 164, Xingangxi Rd, Haizhu District, P. O. Box 510301, Guangzhou, China

    Jianyu Pan, Peng Wan, Deke Chen, Hua Chen, Huili Sun & Bingna Cai

  2. Department of Chemistry and Chemical Engineering, Foshan University, Foshan, 528000, China

    Xin Chen

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  1. Jianyu Pan
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  2. Peng Wan
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  4. Hua Chen
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Correspondence to Bingna Cai.

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Pan, J., Wan, P., Chen, D. et al. Purification and identification of intestinal mucosal cell proliferation-promoting peptides from Crassostrea hongkongensis. Eur Food Res Technol 245, 631–642 (2019). https://doi.org/10.1007/s00217-018-3186-1

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  • DOI: https://doi.org/10.1007/s00217-018-3186-1

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