Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/42942
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Type: Journal article
Title: Nasal mucosa expression of lactoferrin in patients with chronic rhinosinusitis
Author: Psaltis, A.
Bruhn, M.
Ooi, E.
Tan, L.
Wormald, P.
Citation: Laryngoscope, 2007; 117(11):2030-2035
Publisher: Lippincott Williams & Wilkins
Issue Date: 2007
ISSN: 0023-852X
1531-4995
Statement of
Responsibility: 
Alkis J. Psaltis, Maressa A. Bruhn, Eng Hooi Ooi, Lor Wai Tan, Peter-John Wormald
Abstract: Objective/Hypothesis: Antimicrobial peptides, such as lactoferrin, are an important component of the innate immune system. They offer the body a first line defense against a wide range of invading pathogens. The diverse antipathogenic action of lactoferrin has been well characterized; however, the role that this peptide plays in chronic conditions such as rhinosinusitis remains largely unknown. This study aims to examine the level of lactoferrin expression in the nasal mucosa of patients with chronic rhinosinusitis (CRS). Study Design/Methods: Nasal biopsies of 85 chronic rhinosinusitis patients, subclassified into allergic fungal sinusitis (AFS), nonallergic fungal eosinophilic sinusitis (NAFES), nonallergic, nonfungal eosinophilic sinusitis (NANFES), and CRS were studied by quantitative real-time reverse-transcriptase polymerase chain reaction and enzyme-linked immunosorbent assay for their expression of lactoferrin at an mRNA and protein level, respectively. Results: All groups of patients with CRS showed a decrease in lactoferrin mRNA expression relative to controls (median fold-change of CRS relative to controls, 0.1550; AFS, 0.1800; NANFES, 0.1900; and NAFES, 0.2100). All groups also showed a decreased expression of lactoferrin protein (controls, 163.3 ng/mL; CRS, 82.19 ng/mL; AFS, 104.1 ng/mL; NANFES, 118.9 ng/mL; and NAFES, 74.33 ng/mL). The most significant reduction was evident in the CRS subgroup as well as in patients with nasal polyposis at the time of surgery. Conclusions: This is the first study of its kind to objectively examine lactoferrin expression in the nasal mucosa of CRS patients. We report a reduction in the expression of this important antimicrobial peptide at both the mRNA and protein level. Such a defect in the innate immune system may explain the predisposition of certain individuals to develop CRS and nasal polyposis, providing further insight into the pathogenesis of such conditions.
Keywords: Nasal Mucosa; Humans; Sinusitis; Rhinitis; Chronic Disease; Lactoferrin; RNA, Messenger; Enzyme-Linked Immunosorbent Assay; Statistics, Nonparametric; Reverse Transcriptase Polymerase Chain Reaction; Adult; Aged; Aged, 80 and over; Middle Aged; Female; Male
Description: Article first published online: 2 JAN 2009
Rights: © 2007 The American Laryngological, Rhinological & Otological Society, Inc.
RMID: 0020073460
DOI: 10.1097/MLG.0b013e31812e01ab
Description (link): http://www.ncbi.nlm.nih.gov/pubmed/17767090
Published version: http://onlinelibrary.wiley.com/doi/10.1097/MLG.0b013e31812e01ab/full
Appears in Collections:Surgery publications

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