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ANLN is a prognostic biomarker independent of Ki-67 and essential for cell cycle progression in primary breast cancer
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2016 (engelsk)Inngår i: BMC Cancer, ISSN 1471-2407, E-ISSN 1471-2407, Vol. 16, artikkel-id 904Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: Anillin (ANLN), an actin-binding protein required for cytokinesis, has recently been presented as part of a prognostic marker panel in breast cancer. The objective of the current study was to further explore the prognostic and functional value of ANLN as a single biomarker in breast cancer. Methods: Immunohistochemical assessment of ANLN protein expression was performed in two well characterized breast cancer cohorts (n = 484) with long-term clinical follow-up data and the results were further validated at the mRNA level in a publicly available transcriptomics dataset. The functional relevance of ANLN was investigated in two breast cancer cell lines using RNA interference. Results: High nuclear fraction of ANLN in breast tumor cells was significantly associated with large tumor size, high histological grade, high proliferation rate, hormone receptor negative tumors and poor prognosis in both examined cohorts. Multivariable analysis showed that the association between ANLN and survival was significantly independent of age in cohort I and significantly independent of proliferation, as assessed by Ki-67 expression in tumor cells, age, tumor size, ER and PR status, HER2 status and nodal status in cohort II. Analysis of ANLN mRNA expression confirmed that high expression of ANLN was significantly correlated to poor overall survival in breast cancer patients. Consistent with the role of ANLN during cytokinesis, transient knock-down of ANLN protein expression in breast cancer cell lines resulted in an increase of senescent cells and an accumulation of cells in the G2/M phase of the cell cycle with altered cell morphology including large, poly-nucleated cells. Moreover, ANLN siRNA knockdown also resulted in decreased expression of cyclins D1, A2 and B1. Conclusions: ANLN expression in breast cancer cells plays an important role during cell division and a high fraction of nuclear ANLN expression in tumor cells is correlated to poor prognosis in breast cancer patients, independent of Ki-67, tumor size, hormone receptor status, HER2 status, nodal status and age.

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BioMed Central, 2016. Vol. 16, artikkel-id 904
Emneord [en]
ANLN, Prognostic biomarker, Breast cancer, Proliferation, Antibody-based proteomics
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Identifikatorer
URN: urn:nbn:se:kth:diva-197768DOI: 10.1186/s12885-016-2923-8ISI: 000388038200007PubMedID: 27863473Scopus ID: 2-s2.0-84998694458OAI: oai:DiVA.org:kth-197768DiVA, id: diva2:1060706
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QC 20161229

Tilgjengelig fra: 2016-12-29 Laget: 2016-12-08 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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