Trib1 and Evi1 cooperate with Hoxa and Meis1 in myeloid leukemogenesis.
Cooperative activation of Meis1 and Hoxa9 perturbs myeloid differentiation and eventually leads myeloid progenitors to leukemia, yet it remains to be clarified what kinds of subsequent molecular processes are required for development of overt leukemia. To understand the molecular pathway in Hoxa9/Meis1-induced leukemogenesis, retroviral insertional mutagenesis was applied using retrovirus-mediated gene transfer. The mice that received Hoxa9/Meis1-transduced bone marrow cells developed acute myeloid leukemia (AML), and Trib1, Evi1, Ahi1, Raralpha, Pitpnb, and AK039950 were identified as candidate cooperative genes located near common retroviral integration sites. Trib1 and Evi1 were up-regulated due to retroviral insertions, and coexpression of these genes significantly accelerated the onset of Hoxa9/Meis1-induced AML, suggesting that Trib1 and Evi1 are the key collaborators. Furthermore, Trib1 by itself is a novel myeloid oncogene, enhancing phosphorylation of ERK, resulting in inhibition of apoptosis. These results demonstrate the importance of specific oncogene interaction in myeloid leukemogenesis.
Jin
Guang
G
Department of Carcinogenesis, The Cancer Institute, Genome Center, Japanese Foundation for Cancer Research, 3-10-6 Ariake, Koto-ku, Tokyo 135-8550, Japan.
Yamazaki
Yukari
Y
Takuwa
Miki
M
Takahara
Tomoko
T
Kaneko
Keiko
K
Kuwata
Takeshi
T
Miyata
Satoshi
S
Nakamura
Takuro
T
D000818:Animals; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D005260:Female; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism*; D007951:Leukemia, Myeloid / Q000235:genetics / Q000378:metabolism*; D000074008:MDS1 and EVI1 Complex Locus Protein; D051379:Mice; D008868:Microtubule Proteins / Q000235:genetics / Q000378:metabolism*; D000075064:Myeloid Ecotropic Viral Integration Site 1 Protein; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D014411:Neoplastic Stem Cells / Q000378:metabolism*; D011519:Proto-Oncogenes / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
D004268:DNA-Binding Proteins; D018398:Homeodomain Proteins; D000074008:MDS1 and EVI1 Complex Locus Protein; C499305:Mecom protein, mouse; C000616392:Meis1 protein, mouse; D008868:Microtubule Proteins; D000075064:Myeloid Ecotropic Viral Integration Site 1 Protein; D009363:Neoplasm Proteins; D014157:Transcription Factors; C497704:Trib protein, mouse; C097899:homeobox protein HOXA9