Keratinocyte differentiation induces APOBEC3A, 3B, and mitochondrial DNA hypermutation

Kousho Wakae*, Tomoaki Nishiyama, Satoru Kondo, Takashi Izuka, Lusheng Que, Cong Chen, Kina Kase, Kouichi Kitamura, Md Mohiuddin, Zhe Wang, Md Monjurul Ahasan, Mitsuhiro Nakamura, Hiroshi Fujiwara, Tomokazu Yoshizaki, Kazuyoshi Hosomochi, Atsushi Tajima, Tomomi Nakahara, Tohru Kiyono, Masamichi Muramatsu

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

20 被引用数 (Scopus)

抄録

Mitochondrial DNA (mtDNA) mutations are found in many types of cancers and suspected to be involved in carcinogenesis, although the mechanism has not been elucidated. In this study, we report that consecutive C-to-T mutations (hypermutations), a unique feature of mutations induced by APOBECs, are found in mtDNA from cervical dysplasia and oropharyngeal cancers. In vitro, we found that APOBEC3A (A3A) and 3B (A3B) expression, as well as mtDNA hypermutation, were induced in a cervical dysplastic cell line W12 when cultured in a differentiating condition. The ectopic expression of A3A or A3B was sufficient to hypermutate mtDNA. Fractionation of W12 cell lysates and immunocytochemical analysis revealed that A3A and A3B could be contained in mitochondrion. These results suggest that mtDNA hypermutation is induced upon keratinocyte differentiation, and shed light on its molecular mechanism, which involves A3s. The possible involvement of mtDNA hypermutations in carcinogenesis is also discussed.

本文言語英語
論文番号9745
ジャーナルScientific Reports
8
1
DOI
出版ステータス出版済み - 2018/12/01

ASJC Scopus 主題領域

  • 一般

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