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Published on: June 6, 2025
Aberrant expression of MAPK1 and MCTS1 in chronic myeloid leukemia (CML)
Leo Kortendick1, Corinna Meyer1, Stefan Nagel1
1Human and Animal Cell Lines, Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Lower Saxony, Germany.
Abstract:
Genomic amplification may result in aberrant gene expression and support development of cancer, including chronic myeloid leukemia (CML). In CML cell line K-562, we recently reported overexpression of TBX1 located at chromosomal position 22q11, focally co-amplified together with BCR, part of the CML hallmark fusion gene BCR::ABL1. Here, we extended that study, by identifying genomically amplified and overexpressed MAPK1/ERK2 at 22q11 together with MCTS1 at Xq22. Using pharmacological inhibitors and siRNA-mediated knockdown assays, our data collectively revealed novel regulatory connections between TBX1, MAPK1 and MCTS1, which may play a role in drug resistance.
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