Abstract:
:Gene targeting studies in mice have shown that the transcription factor Ikaros plays an essential role in lymphoid development and as a tumor suppressor in T cells, whereas the related gene Aiolos functions as a tumor suppressor in B cells. We analyzed the expression levels of the Ikaros gene family, Ikaros and Aiolos, in human bone marrow samples from patients with adult acute lymphoblastic leukemia [ALL (n = 46; B-cell ALL = 41; T-cell ALL = 5)]. Overexpression of the dominant negative isoform of Ikaros gene Ik-6 was observed in 14 of 41 B-cell ALL patients by reverse transcription-PCR, and the results were confirmed by sequencing analysis and immunoblotting. None of the other dominant negative isoforms of the Ikaros gene were detected by reverse transcription-PCR analysis. Southern blotting analysis with PstI digestion revealed that those patients with the dominant negative isoform Ik-6 might have small mutations in the Ikaros locus. We did not detect any overexpression of dominant negative isoforms of Aiolos in adult ALL patients. These results suggest that Ikaros plays a key role in human B-cell malignancies through the dominant negative isoform Ik-6.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Nakase K,Ishimaru F,Avitahl N,Dansako H,Matsuo K,Fujii K,Sezaki N,Nakayama H,Yano T,Fukuda S,Imajoh K,Takeuchi M,Miyata A,Hara M,Yasukawa M,Takahashi I,Taguchi H,Matsue K,Nakao S,Niho Y,Takenaka K,Shinagawa K,subject
Has Abstractpub_date
2000-08-01 00:00:00pages
4062-5issue
15eissn
0008-5472issn
1538-7445journal_volume
60pub_type
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