An instructive role for Interleukin-7 receptor α in the development of human B-cell precursor leukemia

Author:

Geron Ifat,Savino Angela Maria,Fishman Hila,Tal Noa,Brown JohnORCID,Turati Virginia A.ORCID,James Chela,Sarno JolandaORCID,Hameiri-Grossman Michal,Lee Yu Nee,Rein Avigail,Maniriho Hillary,Birger YehuditORCID,Zemlyansky Anna,Muler Inna,Davis Kara L.ORCID,Marcu-Malina Victoria,Mattson Nicole,Parnas OrenORCID,Wagener Rabea,Fischer UteORCID,Barata João T.ORCID,Jamieson Catriona H. M.,Müschen MarkusORCID,Chen Chun-WeiORCID,Borkhardt ArndtORCID,Kirsch Ilan Richard,Nagler Arnon,Enver TariqORCID,Izraeli ShaiORCID

Abstract

AbstractKinase signaling fuels growth of B-cell precursor acute lymphoblastic leukemia (BCP-ALL). Yet its role in leukemia initiation is unclear and has not been shown in primary human hematopoietic cells. We previously described activating mutations in interleukin-7 receptor alpha (IL7RA) in poor-prognosis “ph-like” BCP-ALL. Here we show that expression of activated mutant IL7RA in human CD34+hematopoietic stem and progenitor cells induces a preleukemic state in transplanted immunodeficient NOD/LtSz-scid IL2Rγnullmice, characterized by persistence of self-renewing Pro-B cells with non-productive V(D)J gene rearrangements. Preleukemic CD34+CD10highCD19+cells evolve into BCP-ALL with spontaneously acquired Cyclin Dependent Kinase Inhibitor 2 A (CDKN2A) deletions, as commonly observed in primary human BCP-ALL. CRISPR mediated gene silencing ofCDKN2Ain primary human CD34+cells transduced with activated IL7RA results in robust development of BCP-ALLs in-vivo. Thus, we demonstrate that constitutive activation of IL7RA can initiate preleukemia in primary human hematopoietic progenitors and cooperates with CDKN2A silencing in progression into BCP-ALL.

Funder

Israel Science Foundation

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

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