Case Report: Precision medicine target revealed by in-vitro modelling of relapsed, refractory ALL from a child with neurofibromatosis

Study ID Alternative Stable ID Type
EGAS00001006187 Other

Study Description

Children with neurofibromatosis have a higher risk of developing juvenile myelomonocytic leukaemia and acute myeloid leukaemia, but rarely develop B-cell acute lymphoblastic leukaemia (B-ALL). Through in-vitro modelling, a novel NF1 p.L2467 frameshift (fs) mutation identified in a relapsed/refractory Ph-like B-ALL patient with neurofibromatosis demonstrated cytokine independence and increased RAS signalling, indicative of leukaemic transformation. Furthermore, these cells were sensitive to the MEK inhibitors trametinib and mirdametinib. Bi-allelic NF1 loss of function may be a contributing factor to relapse and with sensitivity to MEK inhibitors, suggests a novel precision medicine target in the setting of neurofibromatosis patients with B-ALL.

Study Datasets 1 dataset.

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Dataset ID Description Technology Samples
Dataset contains 5 exome BAM files from a child with neurofibromatosis and relapsed refractory acute lymphoblastic leukaemia. The samples are CD19 positive and CD19 negative bone marrow mononuclear cells at both diagnosis and relapse as well as mesenchymal stem cells as the germline control. Libraries were prepared using the SureSelect Clinical Research Exome v2 kit (Agilent Technologies, Santa Clara, CA, USA) and run on the Illumina NextSeq 500 platform.
NextSeq 500 5

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