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Updated: Sep 13, 2026
Chromosome Preparation From Cultured Cells
Published on: January 28, 2014
T-Cell Leukemia Cell Line Harboring Previously Undescribed CBFB::MYL11 Fusion Exhibits a Genome Profile Implicating
Tetsuko Kobayashi1, Satsuki Matsushima2, Hiroaki Ohnishi2
1Hematooncology and Pediatrics, Speech-Language-Hearing Therapy Major, Department of Rehabilitation, Faculty of Health Sciences, Kyorin University, Tokyo, Japan, kobayashi-t@ks.kyorin-u.ac.jp.
Introduction:
Gene fusions involving core binding factors (CBFs), such as CBFB::MYH11, are major contributing factors to leukemia development. The pathogenic mechanism is believed to lie in abnormalities in CBF, however, myosin, the fusion partner, has received little attention. In a preliminary analysis, we identified a previously undescribed fusion transcript, CBFB::MYL11, in RNA-sequencing data from the T-cell leukemia cell line HPB-ALL. We hypothesized that leukemia cells harboring CBFB::MYH11 or CBFB::MYL11 may share a common pathological mechanism involving myosin fusion.
Methods:
Fluorescence in situ hybridization was performed to analyze the structure of CBFB::MYL11 and Western blotting was performed to verify the fusion protein in HPB-ALL. Differentially expressed gene and gene ontology (GO) analyses were performed on ME-1 harboring CBFB::MYH11 and HPB-ALL to investigate characteristics of gene expression and molecular function.
Results:
In situ amplification of MYL11 and co-amplification of CBFB and MYL11 on a marker chromosome were observed. Elevated MYH11 and MYL11 expression and significant upregulation of genes related to the cytoskeleton were observed in the ME-1 and HPB-ALL cell lines. Bands consistent with the CBFB::MYL11 fusion protein were observed using Western blotting.
Conclusion:
This study underscores the pathological significance of cytoskeletal abnormalities in leukemia with CBFB/myosin fusion and provides a foundation for further investigation into their molecular mechanisms.
