Effect of Lf on bacterial virulence factors

Virulence factorLfPathogenEffectRef.
LPShLfE. coli
K. pneumoniae
P. aeruginosa
Decreases endotoxicity by binding to LPS.[30]
hLf
bLf
Lfcin
E. coli
S. typhimurium
Releases LPS and alters outer membrane (OM) permeability.[31, 32]
hLfE. coliDestabilizes OM by binding to LPS.[33]
Secretion systemshLfShigella
E. coli EPEC
Degradation of proteins associated to the type III secretion system.[35]
rLfH. pyloriDecreases expression of the oncogenic cag pathogenicity island-encoded type IV secretion system.[56]
Protease secretionhLfH. influenzaeCleavage within the helper region of IgA (IgAβ) domain.[38]
bLfP. gingivalisInhibits the activity of the cysteine proteases.[39]
bLfA. pleuroneumoniaeInhibits activity of metalloproteases.[22]
bLfM. haemolyticaInhibits secretion and activity of cysteine and metalloproteases.[40, 57]
AdhesionhLfE. coli EPECInhibits adhesion to HeLa cells.[41]
bLf
bLf polypeptides
S. mutansInhibits adhesion to saliva-coated hydroxyapatite.[42]
bLf
rhLf
S. gordoniiInhibits attachment to glass disks.
Inhibits adhesion to titanium surfaces.
[43]
[44]
Adhesion and biofilm formationrhLf
bLfcinB
B. fragilis
B. thethaiotaomicron
Inhibits binding to laminin and biofilm formation.[46]
hLfS. agalactiaeInhibits adherence to human gestational membranes and biofilm formation.[47, 48]
hLf peptideS. sanguinisInhibits adhesion to titanium surfaces and reduces early stages of biofilm formation.[49]
Biofilm formationbLfP. aeruginosaInhibits biofilm formation and reduces preformed biofilm.[50]
bLfcin
bLfampin
bLfchimera
P. aeruginosaDecreases biofilm formation.[51]
bLf
hLf
P. gingivalis
P. intermedia
Abolishes biofilm formation and reduces preformed biofilm.[39, 52]
hLf
bLf
A. baumaniiInhibits biofilm formation.[53]
bLfE. coli EAECDecreases biofilm formation.[54]
bLfS. pneumoniaeEradicates 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