Abstract
Lactoferrin (LF) is a bioactive glycoprotein in human milk and has positive effects on neonates. The LF knockout mouse model was generated as a mother mouse that provided LF-free milk. The intestinal development of suckling neonates drinking normal milk and LF-free milk was studied. The results showed that the intestinal density, maturity, and barrier integrity of mice drinking LF-free milk were lower than those of mice drinking normal milk. Therefore, the importance of adding lactoferrin to the human formula is considered. Human lactoferrin (HLF), bovine lactoferrin (BLF), and recombinant HLF (RHLF) were used to compare their functional impact on Caco-2 cell lines. Cell proliferation, differentiation, the establishment of the intestinal barrier, and protective effects on lipopolysaccharide injury were detected. Our results showed that RHLF exhibited more similar functions to HLF than BLF and showed the combined advantages of HLF and BLF in promoting the establishment of the intestinal barrier. This study emphasizes the important role of LF in neonatal intestinal development and provides a theoretical basis for the availability of RHLF.
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