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Published in: Breast Cancer Research 4/2004

Open Access 01-08-2004 | Research article

S100A7 (psoriasin) expression is associated with aggressive features and alteration of Jab1 in ductal carcinoma in situof the breast

Authors: Ethan D Emberley, Salem Alowami, Linda Snell, Leigh C Murphy, Peter H Watson

Published in: Breast Cancer Research | Issue 4/2004

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Abstract

Introduction

The S100A7 (psoriasin) gene is highly expressed in ductal carcinoma in situ (DCIS) of the breast and can be downregulated in invasive carcinoma. Persistent S100A7 expression in invasive carcinoma is associated with a worse prognosis, and this effect may be mediated in part through interaction with the multifunctional cell signaling protein Jab1.

Methods

In order to investigate the relationship between S100A7 and progression from DCIS to invasive carcinoma, we studied S100A7 expression in 136 patients with DCIS (including 46 patients with associated invasive carcinoma) by immunohistochemistry.

Results

S100A7 expression was present in 63 out of 136 (46%) of DCIS lesions and was associated with estrogen receptor negative status (P = 0.0002), higher nuclear grade (P < 0.0001), necrosis (P < 0.0001) and inflammation (P < 0.0001). S100A7 status was no different between DCIS with and DCIS without an invasive component, but higher levels of S100A7 were present in DCIS associated with invasive carcinoma (P < 0.004). Analysis of a subset of cases showed that S100A7 expression was also associated with an increase in nuclear Jab1 (n = 43; P = 0.0019) and reduced p27kip1 (n = 47; P = 0.0168). In cases of DCIS associated with invasive carcinoma, there was also a significant reduction in S100A7 between in situ and invasive components (n = 46; P < 0.0001). In pure DCIS cases treated by local excision, there was no difference in frequency of S100A7 expression between patients with recurrence of DCIS (n = 9) and those without (n = 36).

Conclusion

The findings reported here suggest that, although S100A7 may not be a marker for recurrence of DCIS, it is associated with poor prognostic markers in DCIS and may influence progression of breast carcinoma through its interaction with and influence on Jab1.
Appendix
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Metadata
Title
S100A7 (psoriasin) expression is associated with aggressive features and alteration of Jab1 in ductal carcinoma in situof the breast
Authors
Ethan D Emberley
Salem Alowami
Linda Snell
Leigh C Murphy
Peter H Watson
Publication date
01-08-2004
Publisher
BioMed Central
Published in
Breast Cancer Research / Issue 4/2004
Electronic ISSN: 1465-542X
DOI
https://doi.org/10.1186/bcr791

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