Fanconi anemia signaling network regulates the spindle assembly checkpoint

Fanconi anemia (FA) is a heterogenous genetic disease with a high risk of cancer. The FA proteins are essential for interphase DNA damage repair; however, it is incompletely understood why FA-deficient cells also develop gross aneuploidy, leading to cancer. Here, we systematically evaluated the role...

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Veröffentlicht in:The Journal of clinical investigation 2013-09, Vol.123 (9), p.3839-3847
Hauptverfasser: Nalepa, Grzegorz, Enzor, Rikki, Sun, Zejin, Marchal, Christophe, Park, Su-Jung, Yang, Yanzhu, Tedeschi, Laura, Kelich, Stephanie, Hanenberg, Helmut, Clapp, D Wade
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container_end_page 3847
container_issue 9
container_start_page 3839
container_title The Journal of clinical investigation
container_volume 123
creator Nalepa, Grzegorz
Enzor, Rikki
Sun, Zejin
Marchal, Christophe
Park, Su-Jung
Yang, Yanzhu
Tedeschi, Laura
Kelich, Stephanie
Hanenberg, Helmut
Clapp, D Wade
description Fanconi anemia (FA) is a heterogenous genetic disease with a high risk of cancer. The FA proteins are essential for interphase DNA damage repair; however, it is incompletely understood why FA-deficient cells also develop gross aneuploidy, leading to cancer. Here, we systematically evaluated the role of the FA proteins in chromosome segregation through functional RNAi screens and analysis of primary cells from patients with FA. We found that FA signaling is essential for the spindle assembly checkpoint and is therefore required for high-fidelity chromosome segregation and prevention of aneuploidy. Furthermore, we discovered that FA proteins differentially localize to key structures of the mitotic apparatus in a cell cycle-dependent manner. The essential role of the FA pathway in mitosis offers a mechanistic explanation for the aneuploidy and malignant transformation known to occur after disruption of FA signaling. Collectively, our findings provide insight into the genetically unstable cancers resulting from inactivation of the FA/BRCA pathway.
doi_str_mv 10.1172/JCI67364
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subjects Aneuploidy
Antigens - metabolism
Biomedical research
Cancer
Cell cycle
Cell division
Cell Nucleus - metabolism
Centrosome - metabolism
Chromosomes
Development and progression
Experiments
Fanconi Anemia - genetics
Fanconi Anemia - metabolism
Fanconi Anemia - pathology
Fanconi Anemia Complementation Group Proteins - genetics
Fanconi Anemia Complementation Group Proteins - metabolism
Fanconi's anemia
Fibroblasts - physiology
Flow cytometry
Gene Knockdown Techniques
Genes
HeLa Cells
Humans
Hypotheses
M Phase Cell Cycle Checkpoints
Microscopy
Mitosis
Mutation
Patients
Proteins
Risk factors
RNA Interference
RNA, Small Interfering - genetics
Signal Transduction
Spindle Apparatus - metabolism
Studies
title Fanconi anemia signaling network regulates the spindle assembly checkpoint
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