First Detection of Antimicrobial Peptide Lactoferricin Circulating in Human Blood
Using a new mass spectrometry technique, researchers detected lactoferricin in human serum for the first time, proving this antimicrobial peptide exists naturally in the bloodstream.
Quick Facts
What This Study Found
Lactoferricin was detected and quantified in human serum for the first time using SELDI affinity mass spectrometry, establishing its natural occurrence in the bloodstream.
Key Numbers
How They Did This
In-vitro analytical study developing SELDI affinity mass spectrometry to detect lactoferricin (3196 Da) in human serum. Used antibody-based capture combined with mass spectrometric identification.
Why This Research Matters
Proving lactoferricin exists naturally in human blood transforms it from a lab curiosity to a confirmed part of the body's immune defense system, supporting research into boosting its levels through lactoferrin supplementation.
The Bigger Picture
Many peptides studied in laboratories are assumed to exist in the body, but proving it requires sensitive detection methods. Confirming lactoferricin in blood validates decades of research on its antimicrobial properties and supports its biological relevance.
What This Study Doesn't Tell Us
Method development study focused on detection capability rather than clinical outcomes. The functional significance of circulating lactoferricin levels was not assessed. Serum concentrations may vary significantly between individuals.
Questions This Raises
- ?What are normal lactoferricin levels in healthy people versus those with infections?
- ?Can lactoferrin supplementation measurably increase circulating lactoferricin?
- ?Do lactoferricin blood levels correlate with immune function or infection resistance?
Trust & Context
- Key Stat:
- First in-vivo detection Lactoferricin (3,196 Da) was detected in human serum for the first time using SELDI mass spectrometry
- Evidence Grade:
- Preliminary evidence from an analytical method development study applied to human samples. Novel finding but focused on detection rather than clinical significance.
- Study Age:
- Published in 1998. Lactoferricin research has expanded substantially, with its antimicrobial and immunomodulatory roles now well established.
- Original Title:
- Bactericidal domain of lactoferrin: detection, quantitation, and characterization of lactoferricin in serum by SELDI affinity mass spectrometry.
- Published In:
- Biochemical and biophysical research communications, 245(3), 764-73 (1998)
- Authors:
- Kuwata, H(3), Yip, T T(3), Yip, C L(2), Tomita, M, Hutchens, T W
- Database ID:
- RPEP-00472
Evidence Hierarchy
Frequently Asked Questions
Why is finding lactoferricin in blood important?
It proves this antimicrobial peptide isn't just a lab artifact — the body naturally produces it from lactoferrin. This validates research suggesting it plays a real role in fighting infections.
Can you increase lactoferricin in your blood?
Potentially, through lactoferrin supplementation or consuming lactoferrin-rich foods like milk. This study establishes that the peptide does circulate naturally, which is the first step toward studying how to boost it.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00472APA
Kuwata, H; Yip, T T; Yip, C L; Tomita, M; Hutchens, T W. (1998). Bactericidal domain of lactoferrin: detection, quantitation, and characterization of lactoferricin in serum by SELDI affinity mass spectrometry.. Biochemical and biophysical research communications, 245(3), 764-73.
MLA
Kuwata, H, et al. "Bactericidal domain of lactoferrin: detection, quantitation, and characterization of lactoferricin in serum by SELDI affinity mass spectrometry.." Biochemical and biophysical research communications, 1998.
RethinkPeptides
RethinkPeptides Research Database. "Bactericidal domain of lactoferrin: detection, quantitation,..." RPEP-00472. Retrieved from https://rethinkpeptides.com/research/kuwata-1998-bactericidal-domain-of-lactoferrin
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.