Jie Chen, Shan Wu, Jie-Jie He, Yu-Peng Liu, Zhao-Yang Deng, Han-Kai Fang, Jian-Fan Chen, Ya-Lan Wei, Zhen-Yu She
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引用次数: 0
Abstract
Chromosome congression and alignment are essential for cell cycle progression and genomic stability. Kinesin-7 CENP-E, a plus-end-directed kinesin motor, is required for chromosome biorientation, congression and alignment in cell division. However, it remains unclear how chromosomes are aligned and segregated in the absence of CENP-E in mitosis. In this study, we utilize the CRISPR-Cas9 gene editing method and high-throughput screening to establish CENP-E knockout cell lines and reveal that CENP-E deletion results in defects in chromosome congression, alignment and segregation, which further promotes aneuploidy and genomic instability in mitosis. Both CENP-E inhibition and deletion lead to the dispersion of spindle poles, the formation of the multipolar spindle and spindle disorganization, which indicates that CENP-E is necessary for the organization and maintenance of spindle poles. In addition, CENP-E heterozygous deletion in spleen tissues also leads to the accumulation of dividing lymphocytes and cell cycle arrest in vivo. Furthermore, CENP-E deletion also disrupts the localization of key kinetochore proteins and triggers the activation of the spindle assembly checkpoint. In summary, our findings demonstrate that CENP-E promotes kinetochore-microtubule attachment and spindle pole organization to regulate chromosome alignment and spindle assembly checkpoint during cell division.
期刊介绍:
Cell Proliferation
Focus:
Devoted to studies into all aspects of cell proliferation and differentiation.
Covers normal and abnormal states.
Explores control systems and mechanisms at various levels: inter- and intracellular, molecular, and genetic.
Investigates modification by and interactions with chemical and physical agents.
Includes mathematical modeling and the development of new techniques.
Publication Content:
Original research papers
Invited review articles
Book reviews
Letters commenting on previously published papers and/or topics of general interest
By organizing the information in this manner, readers can quickly grasp the scope, focus, and publication content of Cell Proliferation.