Cited by 376Iron Metabolism and DisordersInfant Nutrition and HealthAntimicrobial Peptides and Activities

Lactoferrin: a natural Glycoprotein involved in iron and inflammatory homeostasis

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Rosa, Luigi, Cutone, Antimo, Lepanto, Maria, Paesano, Rosalba, Valenti, Piera·2017·International Journal of Molecular Sciences

Abstract

Human lactoferrin (hLf), an iron-binding multifunctional cationic glycoprotein secreted by exocrine glands and by neutrophils, is a key element of host defenses. HLf and bovine Lf (bLf), possessing high sequence homology and identical functions, inhibit bacterial growth and biofilm dependently from iron binding ability while, independently, bacterial adhesion to and the entry into cells. In infected/inflamed host cells, bLf exerts an anti-inflammatory activity against interleukin-6 (IL-6), thus up-regulating ferroportin (Fpn) and transferrin receptor 1 (TfR1) and down-regulating ferritin (Ftn), pivotal actors of iron and inflammatory homeostasis (IIH). Consequently, bLf inhibits intracellular iron overload, an unsafe condition enhancing in vivo susceptibility to infections, as well as anemia of inflammation (AI), re-establishing IIH. In pregnant women, affected by AI, bLf oral administration decreases IL-6 and increases hematological parameters. This surprising effect is unrelated to iron supplementation by bLf (80 μg instead of 1-2 mg/day), but to its role on IIH. AI is unrelated to the lack of iron, but to iron delocalization: cellular/tissue overload and blood deficiency. BLf cures AI by restoring iron from cells to blood through Fpn up-expression. Indeed, anti-inflammatory activity of oral and intravaginal bLf prevents preterm delivery. Promising bLf treatments can prevent/cure transitory inflammation/anemia/oral pathologies in athletes.

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Crossref · 10.3390/ijms18091985

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  • LF inhibits adhesion to and invasion of host cells, as demonstrated in studies with enteroinvasive E. coli, Listeria monocytogenes, Streptococcus pyogenes and S. aureus.

    “Yet another antibacterial activity of LF is its ability to inhibit the adhesion to and invasion of host cells as demonstrated in studies with enteroinvasive E. coli, Listeria monocytogenes, Streptococcus pyogenes and S. aureus (Rosa et al., 2017).”

    From Iron in infection and immunity (2020) · cites this paper as Rosa et al., 2017

    Section 2.1 reports that lactoferrin inhibits bacterial adhesion to host cells and describes inhibition of invasion by L. monocytogenes, S. pyogenes, and S. aureus. For E. coli invasion, however, it describes HB101(pRI203), a recombinant strain made capable of entering cells by an inv gene, rather than identifying an enteroinvasive E. coli pathotype. (LLM, conf=0.83)

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Authors
Rosa, L., Cutone, A., Lepanto, M., Paesano, R., & Valenti, P.
Affiliations
Sapienza University of Rome (IT)
Corresponding author
Valenti, Piera
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2017-09-15
Volume
18
Issue
9
Pages
1985
ISSN
1422-0067 (ISSN-L)
OpenAlex
W2755877600
Cited by
376
References
173
Citations by year
2026: 34 · 2025: 42 · 2024: 47 · 2023: 35 · 2022: 62 · 2021: 55 · 2020: 44 · 2019: 34 · 2018: 22 · 2017: 1
FWCI
4.36
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Archivio Istituzionale della Ricerca - Università degli Studi del Molise (submittedVersion)
Funders
Sapienza Università di Roma
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
Keywords
lactoferrin, bovine lactoferrin, iron homeostasis, anemia of chronic disease, interleukin-6, ferroportin, transferrin receptor 1, ferritin, antibacterial activity, bacterial biofilms, bacterial adhesion, preterm birth
MeSH terms
Anemia, Animals, Anti-Infective Agents, Anti-Inflammatory Agents, Female, Glycoproteins, Homeostasis, Humans, Inflammation, Iron, Lactoferrin, Oral Health, Pregnancy, Protein Binding, Structure-Activity Relationship, Anemia, Iron-Deficiency, Premature Birth

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