@article{8d36691ac219426ab49d1207b8fc0d5c,
title = "Loss of NDRG2 expression activates PI3K-AKT signalling via PTEN phosphorylation in ATLL and other cancers",
abstract = "Constitutive phosphatidylinositol 3-kinase (PI3K)-AKT activation has a causal role in adult T-cell leukaemia-lymphoma (ATLL) and other cancers. ATLL cells do not harbour genetic alterations in PTEN and PI3KCA but express high levels of PTEN that is highly phosphorylated at its C-terminal tail. Here we report a mechanism for the N-myc downstream-regulated gene 2 (NDRG2)-dependent regulation of PTEN phosphatase activity via the dephosphorylation of PTEN at the Ser380, Thr382 and Thr383 cluster within the C-terminal tail. We show that NDRG2 is a PTEN-binding protein that recruits protein phosphatase 2A (PP2A) to PTEN. The expression of NDRG2 is frequently downregulated in ATLL, resulting in enhanced phosphorylation of PTEN at the Ser380/Thr382/Thr383 cluster and enhanced activation of the PI3K-AKT pathway. Given the high incidence of T-cell lymphoma and other cancers in NDRG2-deficient mice, PI3K-AKT activation via enhanced PTEN phosphorylation may be critical for the development of cancer. ",
author = "Shingo Nakahata and Tomonaga Ichikawa and Phudit Maneesaay and Yusuke Saito and Kentaro Nagai and Tomohiro Tamura and Nawin Manachai and Norio Yamakawa and Makoto Hamasaki and Issay Kitabayashi and Yasuhito Arai and Yae Kanai and Tomohiko Taki and Takaya Abe and Hiroshi Kiyonari and Kazuya Shimoda and Koichi Ohshima and Akira Horii and Hiroshi Shima and Masafumi Taniwaki and Ryoji Yamaguchi and Kazuhiro Morishita",
note = "Funding Information: We thank Y. Motoyoshi, A. Nakatake and I. Morinaga for their technical assistance and N. Ishigami for secretarial assistance. We thank all of the members of the Division of Tumor and Cellular Biochemistry and HTLV-1/ATL Research Facility, University of Miyazaki for helpful discussions and comments. Also, we gratefully thank all of the researchers, who kindly provided us their important cell lines and materials. This work was supported by Grant-in-Aid for Scientific Research on Priority Areas (20012043) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan; Research fund from Miyazaki Prefecture Collaboration of Regional Entities for the Advancement of Technological Excellence (60G01-B7002022), Japan Science and Technology Agency (JST); Scientific Research (B) (21390098) (KM); and Young Scientists (B) (23701061 to SN and 23790372 to TI) of Japan Society for the Promotion of Science (JSPS).",
year = "2014",
doi = "10.1038/ncomms4393",
language = "English",
volume = "5",
pages = "3393",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
}