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Hemorrhage-induced NRF2 signaling in tumor-associated macrophages drives cancer growth, invasion, and immunotherapy resistance

ABSTRACT: Hemorrhage-induced NRF2 signaling in tumor-associated macrophages drives cancer growth, invasion, and immunotherapy resistance

PROVIDER: PRJNA996034 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25118716.fastq.gz	Fastqsanger.gz
	SRR25118717.fastq.gz	Fastqsanger.gz
	SRR25146892.fastq.gz	Fastqsanger.gz
	SRR25146893.fastq.gz	Fastqsanger.gz
	SRR25146894.fastq.gz	Fastqsanger.gz

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Hemorrhage-activated NRF2 in tumor-associated macrophages drives cancer growth, invasion, and immunotherapy resistance.

Project description:Microscopic hemorrhage is a common aspect of cancers, yet its potential role as an independent factor influencing both cancer progression and therapeutic response is largely ignored. Recognizing the essential function of macrophages in red blood cell disposal, we explored a pathway that connects intratumoral hemorrhage with the formation of cancer-promoting tumor-associated macrophages (TAMs). Using spatial transcriptomics, we found that NRF2-activated myeloid cells possessing characteristics of procancerous TAMs tend to cluster in perinecrotic hemorrhagic tumor regions. These cells resembled antiinflammatory erythrophagocytic macrophages. We identified heme, a red blood cell metabolite, as a pivotal microenvironmental factor steering macrophages toward protumorigenic activities. Single-cell RNA-Seq and functional assays of TAMs in 3D cell culture spheroids revealed how elevated intracellular heme signals via the transcription factor NRF2 to induce cancer-promoting TAMs. These TAMs stabilized epithelial-mesenchymal transition, enhancing cancer invasiveness and metastatic potential. Additionally, NRF2-activated macrophages exhibited resistance to reprogramming by IFN-γ and anti-CD40 antibodies, reducing their tumoricidal capacity. Furthermore, MC38 colon adenocarcinoma-bearing mice with NRF2 constitutively activated in leukocytes were resistant to anti-CD40 immunotherapy. Overall, our findings emphasize hemorrhage-activated NRF2 in TAMs as a driver of cancer progression, suggesting that targeting this pathway could offer new strategies to enhance cancer immunity and overcome therapy resistance.

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NRF2-dependent ECM - Nrf2-Mediated Fibroblast Reprogramming Drives Cellular Senescence by Targeting the Matrisome

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Hemorrhage-induced NRF2 signaling in tumor-associated macrophages drives cancer growth, invasion, and immunotherapy resistance

Project description:This SuperSeries is composed of the SubSeries listed below.

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Nrf2 transcript alterations

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The oncogenic action of NRF2 depends on de-glycation by Fructosamine-3-kinase (FN3K)

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RNA-seq of microglia and monocyte-derived cells in Nrf2 knockout and wild-type mice after induced intracerebral hemorrhage or sham treatment

Project description:Secondary injury causes death and dependence after spontaneous intracerebral haemorrhage (ICH). Having found that ICH is associated with activation of genes regulated by the transcription factor Nrf2, particularly in mononuclear myeloid cells (for example, monocyte-derived cells (MdC) and microglia), we sought to determine the importance of Nrf2 to mononuclear myeloid cell responses and their impact on ICH pathology. We used intrastriatal injection of collagenase to induce ICH in both wild-type mice, and knockout mice with Cx3cr1-Cre-mediated excision of Nrf2 (Nfe2l2) exon 5.

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Examining Transcriptomic Alterations in Rat Models of Intracerebral Hemorrhage and Severe Intracerebral Hemorrhage

Project description:Intracerebral hemorrhage (ICH) is a life-threatening condition associated with significant morbidity and mortality. Understanding the molecular mechanisms underlying ICH and its severe form is crucial for developing effective therapeutic strategies. This study investigates transcriptomic alterations in rodent models of ICH and severe intracerebral hemorrhage to shed light on the genetic pathways involved in hemorrhagic brain injury. We performed principal component analysis, revealing distinct principal component segments of normal rats compared to intracerebral hemorrhage and severe intracerebral hemorrhage rats. We further employed heatmaps and volcano plots to identify differentially expressed genes and utilized bar plots and KEGG pathway analysis to elucidate the different molecular pathways involved. Using comprehensive RNA sequencing and bioinformatics analyses, we identified a multitude of differentially expressed genes in both the ICH and severe ICH models. Our results revealed 5679 common genes among the normal, intracerebral hemorrhage, and severe intracerebral hemorrhage groups in the upregulated genes group, and 1196 common genes in the downregulated genes. A volcano plot comparing the groups further highlighted common genes, including PDPN, TIMP1, SERPINE1, TUBB6, and CD44. These findings underscore the complex interplay of genes involved in inflammation, oxidative stress, and neuronal damage. Furthermore, pathway enrichment analysis uncovered key signaling pathways, including the TNF signaling pathway, protein processing in the endoplasmic reticulum, MAPK signaling pathway, and Fc gamma R-mediated phagocytosis, implicated in the pathogenesis of ICH.

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Interleukin-22 immunotherapy modulates pulmonary gene expression evocative of enhanced tissue barrier and reduces bacterial systemic invasion during severe influenza

Project description:Severe bacterial (pneumococcal) infections are commonly associated with influenza and are significant contributors to the excess morbidity and mortality of influenza. Disruption of lung tissue integrity during influenza participates in bacterial pulmonary colonization and dissemination out of the lungs. Interleukin (IL)-22 has gained considerable interest in anti-inflammatory and anti-infection immunotherapy over the last decade. In the current study, we investigated the effect of exogenous IL-22 delivery on the outcome of bacterial superinfection post-influenza. Our data show that exogenous treatment of influenza-infected mice with recombinant IL-22 reduces bacterial dissemination out of the lungs but is without effect on pulmonary bacterial burden. We describe an IL-22 specific gene signature in the lung tissue of IAV-infected (and naÃ¯ve) mice that might explain the observed effects. Indeed, exogenous IL-22 modulates gene expression profile in a way suggesting a reinforcement of tissue integrity. Our results open the way to alternative approaches for limiting post-influenza bacterial superinfection, particularly systemic bacterial invasion.

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