Abstract
Kinase 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 IL2Rγnull mice, 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 of CDKN2A in 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.
© 2022. The Author(s).
Publication types
-
Research Support, Non-U.S. Gov't
-
Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
-
Animals
-
Antigens, CD34 / genetics
-
Antigens, CD34 / immunology
-
Antigens, CD34 / metabolism
-
Base Sequence
-
Cell Differentiation / genetics
-
Cell Differentiation / immunology
-
Cyclin-Dependent Kinase Inhibitor p16 / genetics
-
Cyclin-Dependent Kinase Inhibitor p16 / immunology
-
Cyclin-Dependent Kinase Inhibitor p16 / metabolism
-
Gene Expression / immunology
-
Humans
-
Interleukin-7 Receptor alpha Subunit / genetics
-
Interleukin-7 Receptor alpha Subunit / immunology*
-
Interleukin-7 Receptor alpha Subunit / metabolism
-
Mice
-
Mice, Inbred NOD
-
Mice, Knockout
-
Mice, SCID
-
Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / genetics
-
Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / immunology*
-
Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / metabolism
-
Precursor Cells, B-Lymphoid / immunology*
-
Precursor Cells, B-Lymphoid / metabolism
-
RNA-Seq / methods
-
Receptors, Cytokine / genetics
-
Receptors, Cytokine / immunology
-
Receptors, Cytokine / metabolism
-
Signal Transduction / genetics
-
Signal Transduction / immunology*
-
Single-Cell Analysis / methods
-
Transplantation, Heterologous
Substances
-
Antigens, CD34
-
CRLF2 protein, human
-
Cyclin-Dependent Kinase Inhibitor p16
-
Interleukin-7 Receptor alpha Subunit
-
Receptors, Cytokine