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Published in: Breast Cancer Research and Treatment 3/2011

01-12-2011 | Preclinical study

Differential expression of arrestins is a predictor of breast cancer progression and survival

Authors: Allison M. Michal, Amy R. Peck, Thai H. Tran, Chengbao Liu, David L. Rimm, Hallgeir Rui, Jeffrey L. Benovic

Published in: Breast Cancer Research and Treatment | Issue 3/2011

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Abstract

Emerging evidence has implicated G protein-coupled receptors, such as CXCR4 and PAR2, in breast cancer progression and the development of metastatic breast cancer. However, the role of proteins that regulate the function of these receptors, such as arrestins, in breast cancer has yet to be determined. Examination of the expression of the two nonvisual arrestins, arrestin2 and 3, in various breast cancer cell lines revealed comparable expression of arrestin3 in basal and luminal lines while arrestin2 expression was much higher in the luminal lines compared to the more aggressive basal lines. Analysis of normal human breast tissue revealed that arrestin2 and 3 were expressed in both luminal and myoepithelial cells of mammary epithelia with arrestin2 highest in myoepithelial cells and arrestin3 comparable in both cell types. Quantitative immunofluorescence-based examination of primary breast tumors revealed that arrestin2 expression significantly decreased with cancer progression from ductal carcinoma in situ to invasive carcinoma and further to lymph node metastasis (P < 0.001). Moreover, decreased arrestin2 expression was associated with decreased survival (P = 0.0007) as well as positive lymph node status and increased tumor size and nuclear grade. In contrast, arrestin3 expression significantly increased during breast cancer progression (P < 0.001) and increased expression was associated with decreased survival (P = 0.014). Arrestin3 was also an independent prognostic marker of breast cancer with a hazard ratio of 1.65. Overall, these studies demonstrate that arrestin2 levels decrease while arrestin3 levels increase during breast cancer progression and these changes correlate with a poor clinical outcome.
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Metadata
Title
Differential expression of arrestins is a predictor of breast cancer progression and survival
Authors
Allison M. Michal
Amy R. Peck
Thai H. Tran
Chengbao Liu
David L. Rimm
Hallgeir Rui
Jeffrey L. Benovic
Publication date
01-12-2011
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 3/2011
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-011-1374-9

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