Reduced Level of the BCL11B Protein Is Associated with Adult T-Cell Leukemia/Lymphoma

Nobuyuki Kurosawa, Rika Fujimoto, Tatsuhiko Ozawa, Takahiro Itoyama, Naoki Sadamori, Masaharu Isobe*

*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

Background: Adult T-cell leukemia/lymphoma (ATLL) develops in a small proportion of human T-cell leukemia virus type I (HTLV-I)-infected individuals. However, the mechanism by which HTLV-I causes ATLL has not been fully elucidated. To provide fundamental insights into the multistep process of leukemogenesis, we have mapped the chromosomal abnormalities in 50 ATLL cases to identify potential key regulators of ATLL. Results: The analysis of breakpoints in one ATLL case with the translocations t(14;17)(q32;q22-23) resulted in the identification of a Kruppel zinc finger gene, BCL11B, which plays a crucial role in T-cell development. Among the 7 ATLL cases that we examined by immunofluorescence analysis, 4 displayed low and one displayed moderate BCL11B signal intensities. A dramatically reduced level of the BCL11B protein was also found in HTLV-I-positive T-cell lines. The ectopic expression of BCL11B resulted in significant growth suppression in ATLL-derived cell lines but not in Jurkat cells. Conclusions: Our genetic and functional data provide the first evidence that a reduction in the level of the BCL11B protein is a key event in the multistep progression of ATLL leukemogenesis.

本文言語英語
論文番号e55147
ジャーナルPLoS ONE
8
1
DOI
出版ステータス出版済み - 2013/01/30

ASJC Scopus 主題領域

  • 生化学、遺伝学、分子生物学一般
  • 農業および生物科学一般
  • 一般

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