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Sébastien Malinge PhD Laboratory Head, Translational Genomics in Leukaemia, Senior Research Fellow (University of Western Australia), Adjunct Senior
Despite significant advances, outcomes for children with Down syndrome (DS, trisomy 21) who develop acute lymphoblastic leukemia remain poor. Reports of large DS-ALL cohorts have shown that children with DS have inferior event-free survival and overall survival compared to children without DS.
Children with Down syndrome (DS, trisomy 21) are at a significantly higher risk of developing acute leukemia compared to the overall population. Many studies investigating the link between trisomy 21 and leukemia initiation and progression have been conducted over the last two decades.
Components of the bone marrow microenvironment (BMM) have been shown to mediate the way in which leukemia develops, progresses and responds to treatment. Increasing evidence shows that leukemic cells hijack the BMM, altering its functioning and establishing leukemia-supportive interactions with stromal and immune cells.
Acute erythroleukemia (AEL or acute myeloid leukemia [AML]-M6) is a rare but aggressive hematologic malignancy. Previous studies showed that AEL leukemic cells often carry complex karyotypes and mutations in known AML-associated oncogenes.
Transcription factors known to induce the epithelial-to-mesenchymal transition (EMT) (such as ZEB1/2 [zinc finger E-box binding homeobox 1/2], SNAI1/2/3, and TWIST1/2) have been undoubtedly implicated in tumorigenesis, cancer progression, metastasis, and chemoresistance in solid tumors; however, their role in normal and malignant hematopoiesis has been underappreciated for many years.
Here we report that CHAF1B is required for normal hematopoiesis while its overexpression promotes leukemia
There are few options for patients with relapse/refractory B-cell acute lymphoblastic leukemia, thus this is a major area of unmet medical need. Here, we reveal that inclusion of a poison exon in RBM39, which could be induced both by CDK9 or CDK9 independent CMGC (cyclin-dependent kinases, mitogen-activated protein kinases, glycogen synthase kinases, CDC-like kinases) kinase inhibition, is recognized by the nonsense-mediated mRNA decay pathway for degradation.
An in-depth investigation of gene regulation and cell populations at sites of fetal blood-cell production provides clues as to why children with Down’s syndrome are predisposed to developing leukaemia.
T cells engineered to express chimeric-antigen receptors (CAR-T cells) can effectively control relapsed and refractory haematological malignancies in the clinic. However, the successes of CAR-T cell therapy have not been recapitulated in solid tumours due to a range of barriers such as immunosuppression, poor infiltration, and tumour heterogeneity.