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Erschienen in: Virchows Archiv 1/2005

01.07.2005 | Original Article

Significance of inducible nitric oxide synthase expression in benign and malignant breast epithelium: an immunohistochemical study of 151 cases

verfasst von: Asiye Safak Bulut, Esra Erden, Serpil Dizbay Sak, Hatice Doruk, Nazmiye Kursun, Dilek Dincol

Erschienen in: Virchows Archiv | Ausgabe 1/2005

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Abstract

The role of calcium independent inducible nitric oxide synthase (iNOS) in breast carcinoma is controversial, and the implications of iNOS expression on prognosis are not known. In this study, we aimed to investigate the significance of immunohistochemical iNOS expression in 100 invasive ductal carcinomas. In addition, 11 normal breast tissues, 20 cases of usual ductal hyperplasias (UDHs) and 20 fibroadenomas were included. We found that 78% of malignant and 75% of benign cases showed iNOS immunoreactivity. However, the intensity and the quantity of iNOS expression were significantly higher in the cancer group when compared with benign breasts (P<0.001), suggesting a role of iNOS in breast carcinogenesis. We were unable to show a correlation between iNOS expression and tumor grade, axillary lymph node status, and estrogen receptor expression. In 50 axilla negative cases having 5–12 years follow-up, disease free survival (DFS) rate was significantly lower in cases showing strong iNOS expression (P=0.05). As strong iNOS expression was correlated with short DFS, we concluded that further studies would be necessary to elucidate if iNOS expression might be a useful prognostic marker in breast carcinoma, especially in the axilla negative group.
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Metadaten
Titel
Significance of inducible nitric oxide synthase expression in benign and malignant breast epithelium: an immunohistochemical study of 151 cases
verfasst von
Asiye Safak Bulut
Esra Erden
Serpil Dizbay Sak
Hatice Doruk
Nazmiye Kursun
Dilek Dincol
Publikationsdatum
01.07.2005
Erschienen in
Virchows Archiv / Ausgabe 1/2005
Print ISSN: 0945-6317
Elektronische ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-005-1250-2

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