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<p>Yak milk protein is a natural carrier for bioactive substances, and its digestion behaviors affect the bioavailability of anthocyanins (ACNs). In this study, the yak milk proteins (WP and CN) with carrageenan (CAR) were used as the carrier to nanocomplexes loaded with <i>Lycium ruthenicum Murr.</i> anthocyanins and their digestion behaviors were investigated. The results showed that WP-CAR and CA-CAR did not affect the release of ACNs at gastric digestion (SGF), while they significantly protected the stability and antioxidant properties of ACNs in intestinal digestion (SIF). Particle size distribution results exhibited that the aggregates formed in the CA-ACNs-CAR and WP-ACNs-CAR nanocomplexes at the SGF were broken down into smaller ones in SIF. SDS-PAGE and protein hydrolysis degree analysis revealed that ACNs and CAR increased yak milk protein digestibility, especially in SIF environments. FTIR and FS analysis indicated the protein structure changes induced by ACNs and CAR during digestion. These findings demonstrate that yak milk proteins and carrageenan-based nanocomplex could be used for increase high-quality protein digestion fate and absorption of ACNs in the intestine.</p>

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The in-vitro digestion behaviors of nanocomplexes comprising Yak milk protein-anthocyanins-carrageenan: the stability, antioxidant and structural properties

  • 期刊论文

  • 发表日期：

    2025年9月3日

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  • Torkun Mamet,
  • Yerkengul Yertai,
  • Caihong Li,
  • Yidong Wei,
  • Peipei Wang

摘要

Yak milk protein is a natural carrier for bioactive substances, and its digestion behaviors affect the bioavailability of anthocyanins (ACNs). In this study, the yak milk proteins (WP and CN) with carrageenan (CAR) were used as the carrier to nanocomplexes loaded with Lycium ruthenicum Murr. anthocyanins and their digestion behaviors were investigated. The results showed that WP-CAR and CA-CAR did not affect the release of ACNs at gastric digestion (SGF), while they significantly protected the stability and antioxidant properties of ACNs in intestinal digestion (SIF). Particle size distribution results exhibited that the aggregates formed in the CA-ACNs-CAR and WP-ACNs-CAR nanocomplexes at the SGF were broken down into smaller ones in SIF. SDS-PAGE and protein hydrolysis degree analysis revealed that ACNs and CAR increased yak milk protein digestibility, especially in SIF environments. FTIR and FS analysis indicated the protein structure changes induced by ACNs and CAR during digestion. These findings demonstrate that yak milk proteins and carrageenan-based nanocomplex could be used for increase high-quality protein digestion fate and absorption of ACNs in the intestine.