Lactoferrin Digestion Patterns and Bioactive Peptide Release in the Elderly: A Gastroenterology Study

Strategic Insights -

Investigators at Tianjin University of Science and Technology have conducted a study to characterize the digestive behaviors of lactoferrin (LF) produced by freeze-drying (F-LF) and spray-drying (S-LF) methods in the elderly gastrointestinal (GI) environment. The researchers used an in vitro dynamic digestion system (DHSI-IV) to simulate GI conditions and found that S-LF was more thoroughly hydrolyzed than F-LF. The study also identified six peptides with good bioactivity, toxicity, solubility, and stability, which were selected for molecular docking with acetylcholinesterase (AChE). The results provide a theoretical basis for understanding LF digestion and the release of bioactive peptides in the elderly.

Key Takeaways:

  • The study characterized the digestive behaviors of lactoferrin (LF) produced by freeze-drying (F-LF) and spray-drying (S-LF) methods in the elderly gastrointestinal (GI) environment.
  • S-LF was more thoroughly hydrolyzed than F-LF, as demonstrated by the surface morphology results.
  • The proteolysis profile showed that F-LF and S-LF were resistant to gastric hydrolysis, especially F-LF, with a dominant band observed in 40 kDa after 60 minutes of digestion.
  • Six peptides with good bioactivity, toxicity, solubility, and stability were identified, including APVDAFK, which exhibited the highest '-CDOCKER Energy' (9.1) when docked with acetylcholinesterase (AChE).
  • The study concluded that LF undergoes protein degradation and structural breakdown in the elderly GI environment, while simultaneously producing bioactive peptides.
  • The research provides a theoretical basis for understanding LF digestion and the release of bioactive peptides in the elderly.

Statistics:

  • 6 peptides with good bioactivity, toxicity, solubility, and stability were identified.
  • The '-CDOCKER Energy' of APVDAFK was 9.1.
  • The dominant band observed in 40 kDa after 60 minutes of digestion.
  • 79, 74, 77, and 77 peptides with 7-30 amino acid residues were identified in FI60, FI120, SI60, and SI120, respectively.

Sources:

  • Xu, et al. (2025) Digestion patterns and bioactive peptide release of lactoferrin produced by different processes: An in vitro study using a dynamic gastrointestinal digestion system of elderly. Food Research International, 220, 117079.
  • Elsevier. (2025) Food Research International. Radarweg 29, 1043 Nx Amsterdam, Netherlands.
  • NewsRx. (2025) Data on Iron-Binding Proteins Described by Researchers at Tianjin University of Science and Technology (Digestion patterns and bioactive peptide release of lactoferrin produced by different processes: An in vitro study using a dynamic ...). Gastroenterology Week. October 20, 2025; p 191.