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Dual Bioactivity of Angiotensin Converting Enzyme Inhibition and Antioxidant Novel Tripeptides from Sipunculus nudus L. and Their Related Mechanism Analysis for Antihypertention

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A Correction to this article was published on 18 February 2023

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Abstract

The pathogenesis of hypertension is related to many factors including active angiotensin-I-converting enzyme (ACE) and excess reactive oxygen species (ROS), the combination of ACE inhibition and antioxidant activity in one compound might be useful for the treatment of hypertension. Sipunculus nudus L contain high protein content, which can be used as a valuable raw material to prepare bio-active peptides. In this study, two novel tripeptides, LPK and PRP, with dual bioactivity of ACE inhibition and antioxidant were purified and identified from the worm. The antioxidant activities of LPK and PRP are dose-dependent, including 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide anion and hydroxyl radical scavenging activities. Moreover, the antioxidant activity of PRP was stronger than that of LPK. In addition, LPK and PRP also show higher ACE inhibitory activity, with IC50 of 6.54 and 0.42 mM, respectively. Molecular docking simulation showed that both the peptides could interact with the active ACE sites via hydrogen bonds, which can reduce the production of Ang II, thereby; LPK and PRP treatment could decrease Ang II-triggered superoxide production, and meanwhile, the peptides treatment could directly remove excess reactive oxygen species. The above-mentioned advantageous effects appeared to involve the stress of the RAS and scavenging ROS, both were benefit to treat hypertension. This research showed that LPK and PRP had potential to be developed as antihypertension agents, which might be a new strategy for high value utilization of Sipunculus nudus L as functional food material.

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Abbreviations

S. nudus :

Sipunculus nudus  L.

ACE:

Angiotensin I converting enzyme

ROS:

Reactive oxygen species

RAS:

renin-angiotensin-aldosterone system

RSM:

Response surface methodology

DPPH:

1,1–Diphenyl-2-Picrylhydrazyl

HHL:

Hippuryl–l– Histidyl-l-Leucine

BBD:

Box–Behnken design

MD:

Molecular dynamics

Ang:

Angiotensin

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Acknowledgements

This work was supported by the Fund of Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) (ZJW-2019-007) and the Science and Technology Program of Zhanjiang (2020A04005)].

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HL: performed the experiments and analyzed the data; writing-original draft; XC: complete part of the experiment; TW, MH: proofreading the manuscript; LL: partial experimental guidance; HL: project administration; YL: experimental design and guidance, revised the manuscript.

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Correspondence to Yingnian Lu.

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The authors declare that they have no conflict of interest.

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The original online version of this article was revised: the typo in author name Xiaoxuan Cai has been corrected.

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Liu, H., Cai, X., Huang, M. et al. Dual Bioactivity of Angiotensin Converting Enzyme Inhibition and Antioxidant Novel Tripeptides from Sipunculus nudus L. and Their Related Mechanism Analysis for Antihypertention. Int J Pept Res Ther 29, 3 (2023). https://doi.org/10.1007/s10989-022-10470-6

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  • DOI: https://doi.org/10.1007/s10989-022-10470-6

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