Identification and the molecular mechanism of novel duck liver-derived anti-inflammatory peptides in lipopolysaccharide-induced RAW264.7 cell model  

作　　者：Xiankang Fan Laidi Zhang Yangying Sun Changyu Zhou Qiang Xia Lihui Du Zhen Wu Daodong Pan 

机构地区：[1]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Ningbo University,Ningbo 315211,China [2]Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province,College of Food and Pharmaceutical Sciences,Ningbo University,Ningbo 315832,China

出　　处：《Food Science and Human Wellness》2024年第6期3595-3605,共11页食品科学与人类健康（英文）

基　　金：supported by the National Key R&D Program of China(2021YFD2100104);Science and Technology Programs of Zhejiang(2019C02085);the Modern Agricultural Technical Foundation of China(CARS-42-25).

摘　　要：In this study,10 novel anti-inflammatory peptides were identified from duck liver,and their molecular mechanism was demonstrated based on machine learning and molecular docking.Using Sephadex G-15 gel chromatography separation,reversed-phase high-performance liquid chromatography purification,liquid chromatography-tandem mass spectrometry identification,and BIOPEP database comparison,10 novel antiinflammatory peptides were initially found.Their splendid angiotensin-converting enzyme(ACE)inhibition and anti-inflammatory properties were confirmed by machine learning.With binding energies less than–20.93 kJ/mol,molecular docking revealed that they could efficiently bind to the active pockets of tumor necrosis factorα(TNF-α),interleukin 6(IL-6),cyclooxygenase 2(COX-2),and nuclear factorκB(NF-κB)proteins with efficiency,indicating that the compounds can spontaneously form complexes through hydrogen bonding and hydrophobic interactions with the protein binding pockets.In the lipopolysaccharide-induced RAW264.7 cell model,the release of NO,TNF-α,and IL-6 and the mRNA expression of inflammatory factors(TNF-α,IL-6,COX-2,and NF-κB)were significantly inhibited by these peptides.We concluded it might be due to their anti-inflammatory effects by inhibiting the protein phosphorylation of inhibitor of NF-κB(IκBα)in the cytoplasm and preventing the translocation of NF-κB p65 in the cytoplasm to the nucleus,thereby regulating the NF-κB signaling pathway.This study is essential for the screening of anti-inflammatory peptides and the investigation of the mechanism of action.

关 键 词：PEPTIDES Machine learning Molecular docking Infl ammation Liquid chromatography-tandem mass spectrometry 

分 类 号：TS201.2[轻工技术与工程—食品科学]