壳聚糖复合β-乳球蛋白负载EGCG纳米粒的制备及其对糖尿病小鼠血糖的影响

doi:10.13305/j.cnki.jts.2022.05.003

Abstract

Abstract: As the main bioactive component in tea, EGCG has abundant physiological functions. However, its low stability makes it easy to be degraded and has low bioavailability. In this experiment, carboxymethyl chitosan (CMC), chitosan hydrochloride (CHC), and β-lactoglobulin (β-LG) were used as wall materials to encapsulate EGCG. The microscopic morphology of particles were observed through electron microscope microscopic morphological observation, structural characterization (measurement of particle size, Zeta potential). The entrapment efficiency and simulated gastrointestinal fluid release rate were determined by HPLC. Finally, the activities of nanoparticles were explored by measuring the effect of nanoparticles on blood glucose in diabetic mice. The result shows that the prepared CS-β-LG-EGCG nanoparticles had complete structures, particle size of 10-100 nm, and certain dispersibilities. The entrapment efficiency was greater than 50%, and it had a slow-release effect in intestinal and gastric juices. CS-β-LG-EGCG nanoparticles had no antagonistic effect with insulin. Compared with uncoated EGCG, the sustained-release effect of the particles can slow down the recovery of blood glucose.

Key words: EGCG, chitosan, β-lactoglobulin, simulated gastric juice, diabetes

CLC Number:

CHEN Ke, WANG Yuanzhu, YANG Xiaoying, ZHANG Dongying, ZHU Qiangqiang. Preparation of Nanoparticules with Chitosan Complexed β-lactoglobulin Loaded EGCG and their Effects on Blood Glucose in Diabetic Mice[J]. Journal of Tea Science, 2022, 42(5): 731-739.

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Preparation of Nanoparticules with Chitosan Complexed β-lactoglobulin Loaded EGCG and their Effects on Blood Glucose in Diabetic Mice

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