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Published in: Virchows Archiv 4/2018

01-04-2018 | Original Article

Minichromosome maintenance complex component 6 (MCM6) expression correlates with histological grade and survival in endometrioid endometrial adenocarcinoma

Authors: Judicaël Hotton, Mikaël Agopiantz, Agnès Leroux, Claire Charra-Brunaud, Béatrice Marie, Hélène Busby-Venner, Olivier Morel, Jean-Louis Guéant, Jean-Michel Vignaud, Shyue-Fang Battaglia-Hsu, Guillaume Gauchotte

Published in: Virchows Archiv | Issue 4/2018

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Abstract

Minichromosome maintenance complex component 6 (MCM6) is involved in initiating DNA replication and is upregulated during licensed G0 phase of the cell cycle. This early expression permits its labeling of more proliferating cells than those by Ki-67. Here using a cohort of 89 endometrioid adenocarcinoma, we report findings made on the prognostic value of MCM6 based on immunohistochemical labeling index (LI) of the protein in comparison with that of Ki67 as no such information is currently available. Additionally, we examined the prognostic values of these markers based on their mRNA expression using a cohort of uterine corpus endometrial carcinoma (UCEC, n = 307) taken from The Cancer Genome Atlas (TCGA) database. Our evidence indicated the presence of a positive correlation between the LI of MCM6 and the histological grade of endometrioid endometrial adenocarcinoma (grade I, 66.7%; grade II, 75.3%; grade III, 81.4%; p < 0.001) and an inverse correlation between the LI of MCM6 and the overall and progression-free survival (p = 0.02 for both). The LI of Ki-67 correlated with grade (p < 0.001), but not survival. The MCM6 and Ki-67 inter-observer intra-class correlation coefficients were excellent: 0.84 (95% confidence interval, 0.83–0.91) and 0.84 (0.77–0.90), respectively. For in silico analyses of the TCGA cohort, both univariate and multivariate Cox analyses (p = 0.003 and p = 0.03, respectively) revealed high MCM6 mRNA Z-scores associated with reduced overall survival. This association was absent for Ki-67. MCM6 is thus a highly reproducible marker of poor prognosis in endometrial cancer. Evaluation of MCM6 should thus be considered in daily practice for risk stratification.
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Metadata
Title
Minichromosome maintenance complex component 6 (MCM6) expression correlates with histological grade and survival in endometrioid endometrial adenocarcinoma
Authors
Judicaël Hotton
Mikaël Agopiantz
Agnès Leroux
Claire Charra-Brunaud
Béatrice Marie
Hélène Busby-Venner
Olivier Morel
Jean-Louis Guéant
Jean-Michel Vignaud
Shyue-Fang Battaglia-Hsu
Guillaume Gauchotte
Publication date
01-04-2018
Publisher
Springer Berlin Heidelberg
Published in
Virchows Archiv / Issue 4/2018
Print ISSN: 0945-6317
Electronic ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-017-2278-9

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