Abstract
In this study, we performed genetic analysis of 83 B cell precursor acute lymphoblastic leukemia (B-ALL) cell lines. First, we performed multiplex ligation-dependent probe amplification analysis to identify copy number abnormalities (CNAs) in eight genes associated with B-ALL according to genetic subtype. In Ph+ B-ALL cell lines, the frequencies of IKZF1, CDKN2A/2B, BTG1, and PAX5 deletion were significantly higher than those in Ph− B-ALL cell lines. The frequency of CDKN2A/2B deletion in KMT2A rearranged cell lines was significantly lower than that in non-KMT2A rearranged cell lines. These findings suggest that CNAs are correlated with genetic subtype in B-ALL cell lines. In addition, we determined that three B-other ALL cell lines had IKZF1 deletions (YCUB-5, KOPN49, and KOPN75); we therefore performed comprehensive genetic analysis of these cell lines. YCUB-5, KOPN49, and KOPN75 had P2RY8-CRLF2, IgH-CRLF2, and PAX5-ETV6 fusions, respectively. Moreover, targeted capture sequencing revealed that YCUB-5 had JAK2 R683I and KRAS G12D, and KOPN49 had JAK2 R683G and KRAS G13D mutations. These data may contribute to progress in the field of leukemia research.
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Acknowledgements
SU-Ph2 was established at Kinki University School of Medicine, Osaka, and provided in 2010 (Dr. Y. Maeda). TCCY was established at Tochigi Cancer Center and provided in 2011 (Dr. Y. Sato). HALO1 and SK9 were established at Tokyo Medical University, Tokyo, and provided in 1997 (Dr. T. Look in Dana-Farber Cancer Institute, Boston, MA) and in 2012 (Dr. S. Okabe), respectively. Endokun was established at Iwate Medical University, Morioka, and provided in 1997 (Dr. M. Endo). Kasumi2 established at Hiroshima University, Hiroshima, and provided in 2010 (Dr. T. Inaba).
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Tomoyasu, C., Imamura, T., Tomii, T. et al. Copy number abnormality of acute lymphoblastic leukemia cell lines based on their genetic subtypes. Int J Hematol 108, 312–318 (2018). https://doi.org/10.1007/s12185-018-2474-7
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DOI: https://doi.org/10.1007/s12185-018-2474-7