Expression levels of the putative zinc transporter LIV-1 are associated with a better outcome of breast cancer patients.

Abstract:

:We investigated the expression pattern of the breast cancer associated gene LIV-1 on mRNA and protein level in 111 human breast cancer patients by in situ hybridization as well as immunohistochemistry and focused on the unknown potential of LIV-1 expression levels as a prognostic marker. To our knowledge, this is the first study on endogenous LIV-1 protein expression. Results of our study indicate that LIV-1 mRNA and protein expression levels are only weakly correlated, suggesting posttranscriptional regulatory mechanisms. Furthermore, LIV-1 mRNA quantity in combination with a positive ER status seem to represent a better marker than the progesterone receptor status according to the prognostic significance for relapse free survival (RFS). A negative correlation of LIV-1 protein levels with tumor size, grade and stage reflects an association of LIV-1 protein expression with less aggressive tumors. High LIV-1 protein expression seems to be associated with a longer relapse free and overall survival in breast cancer patients with invasive ductal carcinoma. This association, however, seems to be dependent from other prognostic markers. Our data suggest that LIV-1 is a promising candidate for a novel marker for breast cancer patients with better outcome. Furthermore, our study presents a revised cDNA sequence of LIV-1 and demonstrates the localization of endogenous LIV-1 in the endoplasmic reticulum.

journal_name

Int J Cancer

authors

Kasper G,Weiser AA,Rump A,Sparbier K,Dahl E,Hartmann A,Wild P,Schwidetzky U,Castaños-Vélez E,Lehmann K

doi

10.1002/ijc.21235

keywords:

subject

Has Abstract

pub_date

2005-12-20 00:00:00

pages

961-73

issue

6

eissn

0020-7136

issn

1097-0215

journal_volume

117

pub_type

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