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Deregulated ALG‐2/HEBP2 axis alters microtubule dynamics and mitotic spindle behavior to stimulate cancer development
Author(s) -
Qin Juan,
Yang Yang,
Gao Siqi,
Liu Yang,
Yu Fan,
Zhou Yunqiang,
Lyu Rui,
Liu Min,
Liu Xinqi,
Li Dengwen,
Zhou Jun
Publication year - 2017
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.25754
Subject(s) - microtubule , mitosis , biology , microbiology and biotechnology , spindle apparatus , genome instability , cancer , cancer cell , downregulation and upregulation , cytoskeleton , cancer research , cell division , genetics , gene , cell , dna , dna damage
Cancer cells are characterized by genomic instability, resulting in the accumulation of mutations that promote cancer progression. One way that genomic instability can arise is through improper regulation of the microtubule cytoskeleton that impacts the function of the mitotic spindle. In this study, we have identified a critical role for the interaction between apoptosis‐linked gene 2 (ALG‐2) and heme‐binding protein 2 (HEBP2) in the above processes. Our data show that the gene copy numbers and mRNA levels for both ALG‐2 and HEBP2 are significantly upregulated in breast and lung cancer. Coexpression of ALG‐2 and HEBP2 markedly increases the cytoplasmic pool of ALG‐2 and alters the subcellular distribution of HEBP2. Our data further reveal that abnormality in the ALG‐2/HEBP2 interaction impairs spindle orientation and positioning during mitosis. In addition, this complex appears to modulate the dynamic properties of microtubules in cancer cells. These finding thus uncover an important function for deregulated ALG‐2/HEBP2 axis in cancer development by influencing microtubule dynamics and spindle behavior, providing novel insight into the etiology and pathogenesis of cancer.