Journal
FOOD SCIENCE AND BIOTECHNOLOGY
Volume 25, Issue 6, Pages 1583-1590Publisher
KOREAN SOCIETY FOOD SCIENCE & TECHNOLOGY-KOSFOST
DOI: 10.1007/s10068-016-0244-y
Keywords
epigallocatechin gallate; chitosan; beta-lactoglobulin; double wall formation; controlled release
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Funding
- National Modern Agriculture Technology System [CARS-23]
- Anhui Major Demonstration Project for Leading Talent Team on Tea Chemistry and Health
- National Natural Science Foundation of China [31301448]
- National Foreign High-end Experts Project [GDW20153400195]
- Korea-China Young Scientist Exchange Program
- Bio-Synergy Research Project of the Ministry of Science, ICT and Future Planning through the National Research Foundation [NRF-2013M3A9C4078159]
- National Research Foundation of Korea [2013M3A9C4078159] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A nano-sized double-walled carrier composed of chitosan and beta-lactoglobulin (beta-Lg) for oral administration of epigallocatechin gallate (EGCG) was developed to achieve a prolonged release of EGCG in the gastrointestinal tract. Carboxymethyl chitosan (CMC) solution was added dropwise to chitosan hydrochloride (CHC) containing EGCG to form a primary coating by ionic complexation. Subsequently, beta-Lg was added to create a secondary layer by ionic gelation. The obtained EGCG-loaded chitosan/beta-Lg nanoparticles had sizes between 100 and 500 nm and zeta potentials ranging from 10 to 35 mV. FT-IR spectroscopy revealed a high number of hydrogen-bonding sites in the nanoparticles, which could incorporate EGCG, resulting in high encapsulation efficiency. EGCG incorporated in the primary coating was released slowly over time by diffusion from the swollen CMC-CHC matrix after the outer layer of beta-Lg was degraded in the intestinal fluid. The sustained-release property makes chitosan/beta-Lg nanoparticles an attractive candidate for effective delivery of EGCG.
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