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Degree of methyl esterification: A key factor for the encapsulation of icaritin with pectin

文献类型： 外文期刊

作者： Chen, Yipeng 1 ; Zhao, Tiantian 2 ; Cheng, Lina 2 ; Yang, Bao 1 ; Wen, Lingrong 1 ;

作者机构： 1.Chinese Acad Sci, Key State Lab Plant Divers & Specialty Crops, Guangdong Prov Key Lab Appl Bot,Key Lab Natl Fores, South China Bot Garden,Guangdong Prov Key Lab Appl, Guangzhou 510650, Peoples R China

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

3.South China Natl Bot Garden, Guangzhou 510650, Peoples R China

4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： Characterization; Loading capacity; NMR

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2024 年 260 卷

页码：

收录情况： SCI

摘要： Pectin is a promising nano-carrier. The degree of methyl esterification (DM) influences the physiochemical properties of pectin. However, the effect of DM on the encapsulation capacity of pectin remains unclear. In this work, low methyl-esterified pectin (LMP) and high methyl-esterified pectin (HMP) were prepared. The molecular weight, rheological properties of these pectins with various DM levels were determined. Then icaritin/pectin micelles (IPMs) were prepared using HMP and LMP. Notably, higher loading capacities (18.75-20.12 %) were observed in HMP-IPMs compared to LMP-IPMs (15.72-16.64 %). Furthermore, LMP-IPMs demonstrated a DMdependent reduction in particle sizes, ranging from 449 to 527 nm. In contrast, the particle sizes of HMPIPMs varied between 342 and 566 nm, with smaller particle sizes observed in HMP-IPMs at higher DM levels. A significant positive correlation was found between DM and the formation of IPMs, including encapsulation efficiency, loading capacity, Zeta potential, and polydispersity index. Alkali de-esterification showed a weak impact on the pectin structure. Hydroxyl groups like 7-OH and 5-OH of icaritin might be involved in the formation of IPMs. The hydrogen-bond interactions between pectin and icaritin could be enhanced as DM increased.

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