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Cannabidiol restores hematopoietic stem cell stemness in mouse through Atf2-Lrp6 axis after acute irradiation

ABSTRACT: Single-cell RNA sequencing analysis demonstrated that the expression levels of genes associated with stemness along with Wnt and BMP signaling pathways were restored by cannabidiol treatment through the upregulation of Atf2, a transcription factor possessing multifunctional properties.

ORGANISM(S): Mus musculus

PROVIDER: GSE253266 | GEO | 2025/02/19

REPOSITORIES: GEO

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Cannabidiol restores hematopoietic stem cell stemness in mouse through Atf2-Lrp6 axis after acute irradiation.

Project description:Bone marrow serves as the residence of hematopoietic stem cells and is recognized as one of the most radiosensitive tissues. Exposure to acute radiation leads to severe damage to bone marrow hematopoiesis which can be fatal, while few clinically applicable medication or specific therapeutic targets have been discovered. In this study, we found that the administration of cannabidiol significantly enhanced individual survival and restored the reconstitution capacity of bone marrow hematopoietic stem cells within 14 days after irradiation. Single-cell RNA sequencing analysis demonstrated that the expression levels of genes associated with stemness along with Wnt and BMP signaling pathways were restored by the cannabidiol treatment through the upregulation of Atf2, a transcription factor possessing multifunctional properties. Atf2 upregulation induced by cannabidiol treatment potentially upregulated the expression of Lrp6 to improve the stemness of hematopoietic stem cells. Further functional experiments validated the crucial role of Atf2 in regulating multilineage differentiation potential of bone marrow hematopoietic stem and progenitor cells. Overall, our findings provide evidence for a promising radioprotective function of cannabidiol and Atf2 as a candidate therapeutic target for acute radiation-induced hematopoietic injury, thereby paving the way for future research in the field.

| S-EPMC11822450 | biostudies-literature

Cannabidiol restores hematopoietic stem cell stemness in mouse through Atf2-Lrp6 axis after acute irradiation

Project description:Cannabidiol restores hematopoietic stem cell stemness in mouse through Atf2-Lrp6 axis after acute irradiation

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Transcriptionally inactive ATF2 variant drives melanomagenesis [Seq]

Project description:Characterized by striking metastatic propensity and chemoresistance, melanoma is among the most lethal cutaneous malignancies. The transcription factor ATF2 was shown to elicit oncogenic activities in melanoma, and its inhibition attenuates melanoma development. Here, a mouse model engineered to express a transcriptionally inactive form of Atf2 (Atf2?8,9) was found to be sufficient to induce nevi formation and, when crossed with BrafV600E animals, to promote melanoma development. The cross of Atf2?8,9 with BrafV600E;Pten-/- mice augmented pigmentation, tumorigenicity, and metastasis. Similar to mouse Atf2?8,9, the human ATF2 splice variant 5 enhanced growth and migration capacity of cultured melanoma and immortalized melanocytes. Induced Melan-A, CXCL9, S100A8, CCR7 expression, seen in Atf2?8,9-driven tumors associate with their enhanced pigmentation, immune infiltration and propensity to metastasize. Notably, elevated ATF2SV5 expression in melanoma specimens coincided with poor prognosis. The gain-of-function activity elicited by the truncated ATF2 form offers unexpected insight into mechanisms underlying melanoma development and progression.

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Transcriptionally inactive ATF2 variant drives melanomagenesis [Array]

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Identification of ATF2 target genes

Project description:In order to identify transcriptional targets of ATF2, we used a recombinant adenovirus to express constitutively active ATF2 in murine hepatoblasts. Expression of GFP was the control condition. Total RNA was harvested from cells 8 hours post infection. Reverse transcription was performed using Ovation Pico WTA kit (NuGen, 3300-12). Labelling, Encore Biotin Module (NuGen, 4200-12) three replicates GFP control and C2ATF2

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2010-06-05 | E-GEOD-1810 | biostudies-arrayexpress

Identification of ATF2 target genes

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Regulation of gene expression by ATF2 in mouse melanocytes

Project description:primary melanocytes from WT and ATF2 mutant (transcriptionally inactive) mice expressing the mutant N-ras transgene were prepared and assessed for changes in gene expression when maintained under normoxia and hypoxia growth conditions. 12 mouse melanocyte samples were analyzed during normoxia and hypoxia, with different ATF2 genotypes. The pivotal samples are represented as duplicates. Treatment of tamoxifen was used to induce recombination and expression of the mutant ATF2 (inducible Cre). Doxycyclin was used to induce expression of mutant N-Ras transgene.

2010-08-30 | E-GEOD-23860 | biostudies-arrayexpress

Myometrial cells expressing CREB, CREM alpha, CREM tau2alpha, ATF2 or the ATF2-small gene

Project description:Human myometrial cells taken from biopsies of pre-menopausal non-cancerous non-pregnant uteri were cultured in complete MEM D-valine medium plus 10% FCS, and stably-transfected with the pcDNA3.1/V5-His TOPO vector (Invitrogen) harbouring either CREB, CREM alpha, CREM tau2alpha, ATF2, ATF2-small gene or a control empty-vector. Total RNA was extracted using TRI-reagent (Sigma) and RNeasy columns (Qiagen), and 10 ug used in target preparation for array hybridization. Keywords: other

2004-02-21 | GSE1059 | GEO

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