X-ray-enhanced cancer cell migration requires the linker of nucleoskeleton and cytoskeleton complex

Cancer Science
Hiromasa ImaizumiMiki Hieda

Abstract

The linker of nucleoskeleton and cytoskeleton (LINC) complex is a multifunctional protein complex that is involved in various processes at the nuclear envelope, including nuclear migration, mechanotransduction, chromatin tethering and DNA damage response. We recently showed that a nuclear envelope protein, Sad1 and UNC84 domain protein 1 (SUN1), a component of the LINC complex, has a critical function in cell migration. Although ionizing radiation activates cell migration and invasion in vivo and in vitro, the underlying molecular mechanism remains unknown. Here, we examined the involvement of the LINC complex in radiation-enhanced cell migration and invasion. A sublethal dose of X-ray radiation promoted human breast cancer MDA-MB-231 cell migration and invasion, whereas carbon ion beam radiation suppressed these processes in a dose-dependent manner. Depletion of SUN1 and SUN2 significantly suppressed X-ray-enhanced cell migration and invasion. Moreover, depletion or overexpression of each SUN1 splicing variant revealed that SUN1_888 containing 888 amino acids of SUN1 but not SUN1_916 was required for X-ray-enhanced migration and invasion. In addition, the results suggested that X-ray irradiation affected the expression level o...Continue Reading

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Citations

Feb 23, 2019·Nihon Hoshasen Gijutsu Gakkai zasshi·Kazumasa Minami
Apr 23, 2020·Breast Cancer Research and Treatment·Timothy D MalouffLaura A Vallow
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May 28, 2021·Breast Cancer Research and Treatment·Maryam FeghhiNasrollah Jabbari

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Methods Mentioned

BETA
X‐ray
PCR

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