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ANP32B-mediated repression of p53 contributes to maintenance of normal and CML stem cells

ABSTRACT: ANP32B-mediated repression of p53 contributes to maintenance of normal and CML stem cells

PROVIDER: PRJNA764729 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15980106_1.fastq.gz	Fastqsanger.gz
	SRR15980106_2.fastq.gz	Fastqsanger.gz
	SRR15980107_1.fastq.gz	Fastqsanger.gz
	SRR15980107_2.fastq.gz	Fastqsanger.gz
	SRR15980108_1.fastq.gz	Fastqsanger.gz

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ANP32B-mediated repression of p53 contributes to maintenance of normal and CML stem cells

Project description:we demonstrate that conditional deletion of acidic leucine-rich nuclear phosphoprotein 32B (ANP32B) in hematopoietic cells impairs repopulation capacity and postinjury regeneration of HSCs. Mechanistically, ANP32B forms a repressive complex with and thus inhibits the transcriptional activity of p53 in hematopoietic cells, and p53 deletion rescues the functional defect in Anp32b-deficient HSCs. Of great interest, ANP32B is highly expressed in leukemic cells from patients with chronic myelogenous leukemia (CML). Anp32b deletion enhances p53 transcriptional activity to impair LSC function in a murine CML model and exhibits synergistic therapeutic effects with tyrosine kinase inhibitors in inhibiting CML propagation. In summary, our findings provide a novel strategy to enhance p53 activity in LSCs by inhibiting ANP32B and identify ANP32B as a potential therapeutic target in treating CML.

2021-09-27 | GSE184474 | GEO

ANP32B-mediated repression of p53 contributes to maintenance of normal and CML stem cells.

Project description:Proper regulation of p53 signaling is critical for the maintenance of hematopoietic stem cells (HSCs) and leukemic stem cells (LSCs). The hematopoietic cell-specific mechanisms regulating p53 activity remain largely unknown. Here, we demonstrate that conditional deletion of acidic leucine-rich nuclear phosphoprotein 32B (ANP32B) in hematopoietic cells impairs repopulation capacity and postinjury regeneration of HSCs. Mechanistically, ANP32B forms a repressive complex with p53 and thus inhibits the transcriptional activity of p53 in hematopoietic cells, and p53 deletion rescues the functional defect in Anp32b-deficient HSCs. Of great interest, ANP32B is highly expressed in leukemic cells from patients with chronic myelogenous leukemia (CML). Anp32b deletion enhances p53 transcriptional activity to impair LSC function in a murine CML model and exhibits synergistic therapeutic effects with tyrosine kinase inhibitors in inhibiting CML propagation. In summary, our findings provide a novel strategy to enhance p53 activity in LSCs by inhibiting ANP32B and identify ANP32B as a potential therapeutic target in treating CML.

| S-EPMC8678996 | biostudies-literature

ANP32B-deficiency suppresses ocular development by repression of PAX6

Project description:We observed that the deletion of Anp32b led to severe defects in ocular development, such as anophthalmia and microphthalmia. Moreover, Anp32b was highly expressed in the lens, and Anp32b−/− embryos with microphthalmia typically exhibited severely impaired lens development. Mechanistically, ANP32B directly interacted with paired box protein 6 (PAX6), a master transcriptional regulator of ocular development, and enhanced its transcriptional activity. In line with these findings, overexpression of PAX6 partially but significantly reversed the inhibition of proliferation observed in ANP32B knockdown cells. Collectively, our findings reveal that ANP32B-deficiency suppresses ocular development by repression of PAX6 and identify ANP32B as a viable therapeutic target for ocular developmental defects.

2025-06-02 | GSE269101 | GEO

ANP32B-deficiency suppresses ocular development by repression of PAX6

Project description:ANP32B-deficiency suppresses ocular development by repression of PAX6

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ANP32B suppresses B-cell acute lymphoblastic leukemia development through activation of PU.1 in mice

Project description:The acidic leucine-rich nuclear phosphoprotein 32B (ANP32B) is critical for maintenance of normal and leukemia stem cells. However, no data exist on ANP32B requirement in B-cell acute lymphoblastic leukemia (B-ALL) progression. Here, we observe that ANP32B is lowly expressed in B-ALL patients, which correlates with poor prognosis. Furthermore, we utilize N-myc or BCR-ABLp190-induced B-ALL mouse model to investigate the role of ANP32B in B-ALL development. Intriguingly, conditional deletion of Anp32b in hematopoietic cells significantly promotes leukemogenesis in B-ALL. Mechanistically, ANP32B interacts with PU.1 and enhances the transcriptional activity of PU.1 in B-ALL cells. Overexpression of PU.1 dramatically suppresses B-ALL progression, and highly expressed PU.1 significantly reverses the accelerated leukemogenesis in Anp32b-deficient mice. Collectively, our findings firstly identify ANP32B as a suppressor gene and provide novel insight into B-ALL pathogenesis.

2025-09-24 | GSE214199 | GEO

BCAT1 contributes to the developmentproliferation and leukemogenesis of TKI-resistant CML

Project description:In this report, we revealed that branched chain amino acid transaminase 1 (BCAT1) is highly enriched in both mouse and human TKI-resistant CML cells. Leukemia was almost completely abrogated upon BCAT1 knockdown during transplantation in a BCR-ABLT315I-induced murine TKI-resistant CML model . Moreover, knockdown of BCAT1 led to a dramatic decrease in the proliferation of TKI-resistant human leukemia cell lines. BCAA/BCAT1 signaling enhanced the phosphorylation of CREB, which is required for maintenance of TKI-resistant CML cells. Importantly, blockade of BCAA/BCAT1 signaling efficiently inhibited leukemogenesis both in vivo and in vitro.

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SIRT1 regulates enhanced mitochondrial respiration and leukemogenicity in CML stem cells

Project description:Chronic myeloid leukemia (CML) results from hematopoietic stem cell transformation by the BCR-ABL tyrosine kinase. We have shown that the SIRT1 deacetylase is overexpressed in CML LSC, and may contribute to their maintenance. Here, using genetic deletion of SIRT1 in transgenic CML mice, we definitively demonstrate that SIRT1 is required for leukemia development, and reveal its critical role in mediating increased mitochondrial respiration in CML LSC.

2019-08-01 | GSE129158 | GEO

The histone chaperone ANP32B regulates chromatin incorporation of the atypical human histone variant macroH2A

Project description:Eukaryotic chromatin structure is highly conserved, with the canonical histone proteins revealing only small sequence changes across species. Yet, all vertebrates exhibit three much larger histone H2A variants, macroH2A. A distinctive feature of these atypical histones is the globular macrodomain module, which can bind metabolites and is connected to the histone fold through a flexible linker. MacroH2A variants impact heterochromatin organization, transcription regulation and establish a barrier for cellular reprogramming. However, the mechanisms of how these large H2A variants are incorporated into chromatin and the identity of any chaperones required for histone deposition have remained elusive. Here, we developed a split-GFP-based cellular readout for histone incorporation and conducted a genome-wide mutagenesis screen in haploid human cells to identify proteins that regulate macroH2A dynamics. We identified and validated the histone chaperone ANP32B as a regulator of macroH2A chromatin deposition. ANP32B associates with macroH2A in cells and in vitro binds to histones with low nanomolar affinity. In vitro nucleosome assembly assays show that ANP32B stimulates deposition of macroH2A-H2B and not of H2A-H2B onto tetraso me. In cells, depletion of ANP32B in cells strongly affects global macroH2A deposition, revealing ANP32B as a macroH2A chaperone. Our study highlights the power of haploid cell functional genomics coupled with cellular imaging to identify factors that are required for chromatin plasticity and diversity.

2023-11-07 | GSE241387 | GEO

Chronic Myeloid Leukemia (CML), induced pluripotent stem cell (iPSC)-derived lin-CD34+CD45+ (iCD34) cell population

Project description:Analysis of lin-CD34+CD45+ (iCD34+) cell population from two normal bone marrow-derived (BM1K and BM9) iPSCs and two CML (CML15 and CML17) iPSCs . CML iCD34+ cells have characteristics similar to primary CML leukemia stem cell in patients. Results provide insight into molecular profile characterized CML iCD34 and mechanism of its maintenance and drug resistance.

2014-08-31 | GSE60065 | GEO

ANP32B promotes colorectal cancer cell progression and reduces cell sensitivity to PRAP1 inhibitor through up-regulating HPF1

Project description:The aim of this work is to explore the role of ANP32B on CRC development

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