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DYRK1A regulates B cell acute lymphoblastic leukemia through phosphorylation of FOXO1 and STAT3

DYRK1A is a serine/threonine kinase encoded on human chromosome 21 (HSA21) that has been implicated in several pathologies of Down syndrome (DS), including cognitive deficits and Alzheimer's disease. Although children with DS are predisposed to developing leukemia, especially B cell acute lymphoblastic leukemia (B-ALL), the HSA21 genes that contribute to malignancies remain largely undefined. Here, we report that DYRK1A is overexpressed and required for B-ALL. Genetic and pharmacologic inhibition of DYRK1A decreased leukemic cell expansion and suppressed B-ALL development in vitro and in vivo.

The bone marrow microenvironment of pre-B acute lymphoblastic leukemia at single-cell resolution

The bone marrow microenvironment (BMM) plays a key role in leukemia progression, but its molecular complexity in pre-B cell acute lymphoblastic leukemia (B-ALL), the most common cancer in children, remains poorly understood. To gain further insight, we used single-cell RNA sequencing to characterize the kinetics of the murine BMM during B-ALL progression.

Gain of chromosome 21 in hematological malignancies: lessons from studying leukemia in children with Down syndrome

Structural and numerical alterations of chromosome 21 are extremely common in hematological malignancies. While the functional impact of chimeric transcripts from fused chromosome 21 genes such as TEL-AML1, AML1-ETO, or FUS-ERG have been extensively studied, the role of gain of chromosome 21 remains largely unknown.

Constitutive Activation of RAS/MAPK Pathway Cooperates with Trisomy 21 and Is Therapeutically Exploitable in Down Syndrome B-cell Leukemia

Children with Down syndrome (constitutive trisomy 21) that develop acute lymphoblastic leukemia (DS-ALL) have a 3-fold increased likelihood of treatment-related mortality coupled with a higher cumulative incidence of relapse, compared with other children with B-cell acute lymphoblastic leukemia (B-ALL).

Romidepsin enhances the efficacy of cytarabine in vivo, revealing HDAC inhibition as a therapeutic strategy for KMT2A-rearranged acute lymphoblastic leukemia

In this study, we investigate the in vivo synergy between romidepsin and cytarabine

Partial trisomy 21 contributes to T-cell malignancies induced by JAK3-activating mutations in murine models

This JAK3A572V knockin model is a relevant new tool for testing the efficacy of JAK inhibitors in JAK3-related hematopoietic malignancies

Development of new preclinical models of childhood leukaemia

Sébastien Laurence Rishi S. Malinge Cheung Kotecha PhD BPharm (Hons) MBA PhD MB ChB (Hons) MRCPCH FRACP PhD Laboratory Head, Translational Genomics

Exploring clonal diversity in paediatric B-cell leukaemia to identify new therapeutic weakness

Sébastien Rishi S. Laurence Timo Malinge Kotecha Cheung Lassmann PhD MB ChB (Hons) MRCPCH FRACP PhD BPharm (Hons) MBA PhD BSc (Hons) MSc PhD

Translational Genomics in Leukaemia

The Translational Genomics in Leukaemia team is focused on identifying the causes of leukaemia, with the goal of developing new targeted treatments to improve quality of care and long-term survival for all children with leukaemia.

Stepwise GATA1 and SMC3 mutations alter megakaryocyte differentiation in a Down syndrome leukemia model

Acute megakaryoblastic leukemia of Down syndrome (DS-AMKL) is a model of clonal evolution from a preleukemic transient myeloproliferative disorder requiring both a trisomy 21 (T21) and a GATA1s mutation to a leukemia driven by additional driver mutations.