Effect of Lf on bacterial virulence factors
Virulence factor | Lf | Pathogen | Effect | Ref. |
---|---|---|---|---|
LPS | hLf | E. coliK. pneumoniaeP. aeruginosa | Decreases endotoxicity by binding to LPS. | [30] |
hLfbLfLfcin | E. coliS. typhimurium | Releases LPS and alters outer membrane (OM) permeability. | [31, 32] | |
hLf | E. coli | Destabilizes OM by binding to LPS. | [33] | |
Secretion systems | hLf | ShigellaE. coli EPEC | Degradation of proteins associated to the type III secretion system. | [35] |
rLf | H. pylori | Decreases expression of the oncogenic cag pathogenicity island-encoded type IV secretion system. | [56] | |
Protease secretion | hLf | H. influenzae | Cleavage within the helper region of IgA (IgAβ) domain. | [38] |
bLf | P. gingivalis | Inhibits the activity of the cysteine proteases. | [39] | |
bLf | A. pleuroneumoniae | Inhibits activity of metalloproteases. | [22] | |
bLf | M. haemolytica | Inhibits secretion and activity of cysteine and metalloproteases. | [40, 57] | |
Adhesion | hLf | E. coli EPEC | Inhibits adhesion to HeLa cells. | [41] |
bLfbLf polypeptides | S. mutans | Inhibits adhesion to saliva-coated hydroxyapatite. | [42] | |
bLfrhLf | S. gordonii | Inhibits attachment to glass disks.Inhibits adhesion to titanium surfaces. | [43][44] | |
Adhesion and biofilm formation | rhLfbLfcinB | B. fragilisB. thethaiotaomicron | Inhibits binding to laminin and biofilm formation. | [46] |
hLf | S. agalactiae | Inhibits adherence to human gestational membranes and biofilm formation. | [47, 48] | |
hLf peptide | S. sanguinis | Inhibits adhesion to titanium surfaces and reduces early stages of biofilm formation. | [49] | |
Biofilm formation | bLf | P. aeruginosa | Inhibits biofilm formation and reduces preformed biofilm. | [50] |
bLfcinbLfampinbLfchimera | P. aeruginosa | Decreases biofilm formation. | [51] | |
bLfhLf | P. gingivalisP. intermedia | Abolishes biofilm formation and reduces preformed biofilm. | [39, 52] | |
hLfbLf | A. baumanii | Inhibits biofilm formation. | [53] | |
bLf | E. coli EAEC | Decreases biofilm formation. | [54] | |
bLf | S. pneumoniae | Eradicates form biofilm and disrupts eDNA. | [55] |
Lf: lactoferrin; LPS: lipopolysaccharides; hLf: human Lf; bLf: bovine Lf; Lfcin: lactoferricin; rLf: recombinant Lf; EPEC: enteropathogenic E. coli; rhLf: recombinant human Lf; bLfcinB: bovine Lfcin B; bLfcin: bovine Lfcin; bLfampin: bovine lactoferrampin; bLfchimera: bovine Lf chimera; EAEC: enteroaggregative E. coli; A. baumanii: Acinetobacter baumannii; A. pleuroneumoniae: Actinobacillus pleuropneumoniae; B. fragilis: Bacteroides fragilis; B. thethaiotaomicron: Bacteroides thetaiotaomicron; E. coli: Escherichia coli; H. influenza: Haemophilus influenza; H. pylori: Helicobacter pylori; K. pneumoniae: Klebsiella pneumoniae; M. haemolytica: Mannheimia haemolytica; P. aeruginosa: Pseudomonas aeruginosa; P. gingivalis: Porphyromonas gingivalis; S. agalactiae: Streptococcus agalactiae; S. gordonii: Streptococcus gordonii; S. mutans: Streptococcus mutans; S. pneumoniae: Streptococcus pneumoniae; S. sanguinis: Streptococcus sanguinis; S. typhimurium: Salmonella typhimurium