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Aubele, M. ; Spears, M.* ; Ludyga, N. ; Braselmann, H. ; Feuchtinger, A. ; Taylor, K.J.* ; Lindner, K. ; Auer, G.* ; Stering, K. ; Höfler, H. ; Schmitt, M.* ; Bartlett, J.M.S.*

In situ quantification of HER2-protein tyrosine kinase 6 (PTK6) protein-protein complexes in paraffin sections from breast cancer tissues.

Br. J. Cancer 103, 663-667 (2010)
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BACKGROUND: Protein tyrosine kinase 6 (PTK6; breast tumour kinase) is overexpressed in up to 86% of the invasive breast cancers, and its association with the oncoprotein human epidermal growth factor receptor 2 (HER2) was shown in vitro by co-precipitation. Furthermore, expression of PTK6 in tumours is linked with the expression of HER2. METHOD AND RESULTS: In this study, we used the proximity ligation assay (PLA) technique on formalin-fixed paraffin sections from eighty invasive breast carcinoma tissue specimens to locate PTK6-HER2 protein-protein complexes. Proximity ligation assay signals from protein complexes were assessed quantitatively, and expression levels showed a statistically significant association with tumour size (P=0.015) and course of the cancer disease (P=0.012). CONCLUSION: Protein tyrosine kinase 6 forms protein complexes with HER2 in primary breast cancer tissues, which can be visualised by use of the PLA technique. Human epidermal growth factor receptor 2-PTK6 complexes are of prognostic relevance.
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Publication type Article: Journal article
Document type Scientific Article
Keywords PTK6 (BRK); HER2; PLA; protein-protein complexes; formalin-fixed paraffin-embedded (FFPE) breast cancer tissue
ISSN (print) / ISBN 0007-0920
e-ISSN 1532-1827
Quellenangaben Volume: 103, Issue: 5, Pages: 663-667 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Reviewing status Peer reviewed