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Investigation of the Maillard Reaction between Polysaccharides and Proteins from Longan Pulp and the Improvement in Activities

文献类型： 外文期刊

作者： Han, Miao-Miao 1 ; Yi, Yang 1 ; Wang, Hong-Xun 1 ; Huang, Fei 2 ;

作者机构： 1.Wuhan Polytech Univ, Coll Food Sci & Engn, Wuhan 430023, Peoples R China

2.Guangdong Acad Agr Sci, Guangdong Key Lab Agr Prod Proc, Sericultural & Agrifood Res Inst, Key Lab Funct Foods,Minist Agr, Guangzhou 510610, Guangdong, Peoples R China

关键词： longan pulp;polysaccharide;protein;Maillard reaction;physicochemical property;activity

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The purpose of this study was to investigate the Maillard reaction between polysaccharides and proteins from longan pulp and the effects of reaction on their in vitro activities. The polysaccharide-protein mixtures of fresh longan pulp (LPPMs) were co-prepared by an alkali extraction-acid precipitation method. They were then dry-heated under controlled conditions for monitoring the characterization of the Maillard reaction by the measurement of the free amino group content, ultraviolet-visible spectrum, Fourier transform infrared spectrum and molecular weight distribution. All the physicochemical analyses indicated the development of the Maillard reaction between polysaccharides and proteins. The in vitro activity evaluation indicated that the Maillard reaction could effectively enhance the antioxidant, antitumor and immunostimulating activities of LPPMs. The enhancement of 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity and ferric reducing antioxidant power displayed both a positive correlation with the reaction time (p < 0.05). LPPMs dry-heated for three days obtained relatively strong inhibitory activity against HepG2 cells and SGC7901 cells, as well as strong immunostimulating effects on the nitric oxide production and tumor necrosis factor alpha secretion of macrophages. Maillard-type intermacromolecular interaction is suggested to be an effective and controllable method for improving the functional activities of polysaccharides and proteins from longan pulp.

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