Achieving dual functions of texture modification and water retention of shrimp surimi products with the combination of epigallocatechin-3-gallate and γ-cyclodextrin

Food Chem. 2023 Aug 30:418:136034. doi: 10.1016/j.foodchem.2023.136034. Epub 2023 Mar 27.

Abstract

Epigallocatechin-3-gallate (EGCG) exhibits excellent cross-linking effects of myofibrillar proteins, it is prone to self-aggregation, causing excessive cross-linking and moisture loss of gels, which limits its application as a food additive in surimi products. Here, through combination γ-cyclodextrin and EGCG into one inclusion complex, we achieved proper usage of EGCG in shrimp surimi products: elevating both water holding capability and texture properties (hardness, chewiness and resilience). Moreover, the mechanism behind excellent performance was elucidated: as texture modifiers, the complexes improved gel network integrity through intermolecular interactions and moderated disulfide bonds; and as water retainer agents, the complexes promoted transformation of nitrogen in proteins towards the form of protonated amino, facilitating the occurrence of hydration. Furthermore, the inclusion complexes brought a higher phenolic retention within products in contrast with direct addition of EGCG. This work may propose novel insights for the usage of polyphenols as additives in surimi-based products.

Keywords: Gel performance; Litopenaeus vannamei; Surimi; Thermal process; Water retention.

MeSH terms

  • Fish Products / analysis
  • Fish Proteins / chemistry
  • Food Additives
  • Food Handling
  • Gels / chemistry
  • Water
  • gamma-Cyclodextrins*

Substances

  • epigallocatechin gallate
  • gamma-Cyclodextrins
  • Food Additives
  • Gels
  • Water
  • Fish Proteins