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Compare proB cells from WT, Tp53-/-, Lnk-/-, Tp53-/-Lnk-/- mice and Tp53-/-Lnk-/-B-ALL

ABSTRACT: The adaptor protein LNK (SH2B3) has emerged as an important protein in regulating B cell development B cell leukemia. Loss-of-function mutations in LNK (SH2B3) are found in Philadelphia chromosomeâlike acute lymphoblastic leukemia (Ph-like ALL), but how LNK regulates normal B cell development or promotes leukemogenesis remains unclear. We found that combined loss of Lnk and tumor suppressors Tp53 in mice triggers a highly aggressive and transplantable precursor B-ALL. This study aims to investigate the molecular mechanism by which LNK regulates B-ALL development. We performed expression profiling of bone marrow proB progenitors from WT, Tp53-/-, Lnk-/- and preleukemic healthy Tp53/Lnk double knockout (DKO) mice, as well as leukemic bone marrow cells from DKO mice that have developed B-ALL. Results suggest that Tp53-/-Lnk-/- B-ALLs display similar gene expression profiles to human Ph-like B-ALLs, suggesting this model for preclinical and molecular studies. B220+CD19+CD43+AA4.1+IgM-NK1.1-Ly6c- bone marrow proB cells were double sorted from WT, Tp53-/-, Lnk-/- and preleukemic healthy Tp53/Lnk double knockout (DKO) mice, as well as leukemic bone marrow cells from DKO mice that have developed B-ALL. RNA was isolated using miRNeasy kit from QIAGEN and processed using the NuGEN Pico kit. The microarray analysis was performed at the PENN Molecular Profiling/Genomics Facility using GeneChip Mouse Gene 2.0ST array (Affymetrix).

ORGANISM(S): Mus musculus

SUBMITTER: Wei Tong

PROVIDER: E-GEOD-76940 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Compare proB cells from WT, Tp53-/-, Lnk-/-, Tp53-/-Lnk-/- mice and Tp53-/-Lnk-/-B-ALL

Project description:The adaptor protein LNK (SH2B3) has emerged as an important protein in regulating B cell development B cell leukemia. Loss-of-function mutations in LNK (SH2B3) are found in Philadelphia chromosome–like acute lymphoblastic leukemia (Ph-like ALL), but how LNK regulates normal B cell development or promotes leukemogenesis remains unclear. We found that combined loss of Lnk and tumor suppressors Tp53 in mice triggers a highly aggressive and transplantable precursor B-ALL. This study aims to investigate the molecular mechanism by which LNK regulates B-ALL development. We performed expression profiling of bone marrow proB progenitors from WT, Tp53-/-, Lnk-/- and preleukemic healthy Tp53/Lnk double knockout (DKO) mice, as well as leukemic bone marrow cells from DKO mice that have developed B-ALL. Results suggest that Tp53-/-Lnk-/- B-ALLs display similar gene expression profiles to human Ph-like B-ALLs, suggesting this model for preclinical and molecular studies.

2016-04-01 | GSE76940 | GEO

Mus musculus

Project description:Compare proB cells from WT, Tp53-/-, Lnk-/-, Tp53-/-Lnk-/- mice and Tp53-/-Lnk-/-B-ALL

| PRJNA309083 | ENA

The role of Erg in B cell development (ATAC-Seq)

Project description:ATAC-seq of pre-proB, proB and preB populations from Ergfl/fl bone marrow, pre-proB cell population from Rag1CreT/+;ErgΔ/Δ bone marrow, and pre-proB, proB and preB populations from from Rag1CreT/+;ErgΔ/Δ;IgHVH10tar bone marrow.

2020-04-14 | GSE132852 | GEO

The role of Erg in B cell development (RNA-Seq)

Project description:RNA-seq of pre-proB, proB and preB populations from Ergfl/fl bone marrow, pre-proB cell population from Rag1CreT/+;ErgΔ/Δ bone marrow

2020-04-14 | GSE132854 | GEO

Infection exposure promotes ETV6-RUNX1 precursor B cell leukemia revealing secondary genomic alterations in histone modification genes

Project description:We used microarrays to investigate gene expression changes in ETV6/RUNX1 proB and preB cells Bone marrow proB and preB cells of four ETV6/RUNX1 mice compared with bone marrow proB and preB cells of three WT mice and three Pax5+/- mice.

2015-07-03 | E-GEOD-70492 | biostudies-arrayexpress

Young and old HSCs from WT and Lnk-/- mice

Project description:The adaptor protein Lnk is an important negative regulator of HSC homeostasis and self-renewal. This study aims to investigate the role of Lnk in HSC aging. Here we performed expression profiling of bone marrow CD150+CD48-LSK LT-HSCs from young and old WT and Lnk-/- mice. Results identify select Lnk-mediated pathways with potential involvement in HSC self-renewal and aging.

2012-10-03 | GSE39553 | GEO

Expression data from Sh2b3 Knock-out NOTCH1-induced leukemias

Project description:To formally address the tumor suppressor activity of Sh2b3 in vivo, we tested the interaction between oncogenic NOTCH1 and Sh2b3 loss in a retroviral- transduction bone marrow transplantation model of NOTCH-induced T-ALL Forced expression of activated NOTCH1 in this model typically results in full leukemia transformation 5-10 weeks later. We performed microarray gene expression analysis of Sh2b3 wild type and Sh2b3–/– NOTCH1 induced leukemias

2013-11-06 | E-GEOD-44025 | biostudies-arrayexpress

Force expression LNK suppresses interferon Gamma signaling

Project description:LNK (SH2B3) is a key negative regulator of JAK-STAT signaling which has been extensively studied in malignant hematopoietic diseases. We found that LNK is significantly elevated in cutaneous melanoma; this elevation is correlated with hyperactive signaling of the RAS-RAF-MEK pathway. Elevated LNK enhances cell growth and survival in adverse conditions. Forced expression of LNK inhibits signaling by interferon-STAT1 and suppresses interferon (IFN) induced cell cycle arrest and cell apoptosis. In contrast, silencing LNK expression by either shRNA or CRISPR-Cas9 potentiates the killing effect of IFN. The IFN-LNK signaling is tightly regulated by a negative feedback mechanism; melanoma cells exposed to IFN upregulate expression of LNK to prevent overactivation of this signaling pathway. Our study reveals an unappreciated function of LNK in melanoma and highlights the critical role of the IFN-STAT1-LNK signaling axis in this potentially devastating disease. LNK may be further explored as a potential therapeutic target for melanoma immunotherapy.

2019-03-31 | GSE127764 | GEO

LNK suppresses interferon signaling in melanoma

2019-04-29 | GSE127333 | GEO

Immune stress suppresses innate immune signaling in preleukemic precursor B cells to cause leukemia

Project description:We used microarrays to investigate gene expression changes in leukemic bone marrow from Pax5+/-;Myd88+/- mice compared with bone marrow precursor B cells from WT mice and to study the effect of Myd88 downregulation in healthy Pax5+/- proB cells. The initial steps of B-cell acute lymphoblastic leukemia (B-ALL) development usually pass unnoticed in children; germline or somatic alterations affecting transcription factor genes cause the appearance of preleukemic cells still compatible with normal hematopoiesis, and preclinical studies have shown that immune stressors can trigger the malignant transformation of these otherwise silent preleukemic precursors to full-blown B-ALL. Understanding how exposure to immune stressors drives this conversion is a longstanding and unsolved challenge. Here we unveiled a specific “gene/environmental factor” interaction triggering B-ALL development. Our data show that B-ALL development falls into the category of cancers associated with dysregulation of innate immunity, which plays a driving role in the clonal evolution of pre-malignant B-cell precursors toward B-ALL following exposure to an immune stress. Transcriptional profiling of B-ALL allowed the identification of an inflammation-dependent role for Myd88 as a key player in this process. A preleukemic B-cell-autonomous role was evidenced by a significant increase in B-ALL incidence upon Myd88 dowregulation in the leukemia-prone Pax5+/- model. Likewise, early innate immune response induction by Toll-like receptor (TLR) ligation during the preleukemic phase in Pax5+/- mice resulted in a significant delay of B-ALL development. These findings identify a central role for innate immunity dysregulation in B-ALL, with important implications for the understanding and potential therapeutic targeting of the preleukemic state in children.

2023-08-10 | GSE221597 | GEO

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