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Erschienen in: Virchows Archiv 3/2009

01.09.2009 | Original Article

Neutrophil gelatinase-associated lipocalin (NGAL/Lcn2) is upregulated in gastric mucosa infected with Helicobacter pylori

verfasst von: Warner Alpízar-Alpízar, Ole Didrik Laerum, Martin Illemann, José A. Ramírez, Adriana Arias, Wendy Malespín-Bendaña, Vanessa Ramírez, Leif R. Lund, Niels Borregaard, Boye Schnack Nielsen

Erschienen in: Virchows Archiv | Ausgabe 3/2009

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Abstract

Helicobacter pylori infection is one of the most significant risk factors for gastric cancer. The infection is established early in life and persists lifelong leading to a sustained chronic inflammation. Iron is essential for most living organisms. Bacteria use several mechanisms to acquire iron from their hosts, including the synthesis of the potent iron chelators known as siderophores. Hosts cells may express the siderophore-binding protein neutrophil gelatinase-associated lipocalin (NGAL/lipocalin-2 (Lcn2)) in response to infection, thus preventing bacterial iron uptake. We have characterized here the pattern of expression of NGAL/Lcn2 in gastric mucosa (45 non-neoplastic and 38 neoplastic tissue samples) and explored the connection between NGAL/Lcn2 expression and H. pylori infection. Immunohistochemical analysis showed high NGAL/Lcn2 expression in normal and gastritis-affected mucosa compared to low expression in intestinal metaplasia, dysplasia, and gastric cancer. In normal and gastritis-affected mucosa (n = 36 tissue samples), NGAL/Lcn2 was more frequently seen in epithelial cells located at the neck and base of the glands in H. pylori-positive cases than in similar epithelial cells of noninfected cases (Fisher’s exact test, p = 0.04). In conclusion, the high expression of NGAL/Lcn2 in normal and gastritis-affected mucosa infected with H. pylori suggests that NGAL/Lcn2 is upregulated locally in response to this bacterial infection. It is discussed whether this may have a causal relation to the development of gastric cancer.
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Metadaten
Titel
Neutrophil gelatinase-associated lipocalin (NGAL/Lcn2) is upregulated in gastric mucosa infected with Helicobacter pylori
verfasst von
Warner Alpízar-Alpízar
Ole Didrik Laerum
Martin Illemann
José A. Ramírez
Adriana Arias
Wendy Malespín-Bendaña
Vanessa Ramírez
Leif R. Lund
Niels Borregaard
Boye Schnack Nielsen
Publikationsdatum
01.09.2009
Verlag
Springer-Verlag
Erschienen in
Virchows Archiv / Ausgabe 3/2009
Print ISSN: 0945-6317
Elektronische ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-009-0825-8

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