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Distinct SOX signature determines neuroblastoma origin and predicts clinical outcome

ABSTRACT: Distinct SOX signature determines neuroblastoma origin and predicts clinical outcome

PROVIDER: PRJNA549698 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9328480.fastq.gz	Fastqsanger.gz
	SRR9328490.fastq.gz	Fastqsanger.gz
	SRR9328481.fastq.gz	Fastqsanger.gz
	SRR9328482.fastq.gz	Fastqsanger.gz
	SRR9328473.fastq.gz	Fastqsanger.gz

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Distinct SOX signature determines neuroblastoma origin and predicts clinical outcome

Project description:Multimodality treatment of high-risk neuroblastoma can be effective, but up to 50% of children experience recurrent disease with fatal outcome. Extensive genetic intratumoral heterogeneity and diverse clinical outcomes pose therapeutic challenges in treating children affected by this aggressive disease. Several hypotheses have been proposed to explain the heterogeneity of neuroblastoma, including a possible origin from multipotent neural crest stem cells (NCSCs). Utilizing an in vivo mouse genetics approach, we demonstrate that lineage-restricted sympathoadrenal (SA) progenitors and not NCSCs are the cellular origin of neuroblastoma. Human neuroblastoma tissue is composed of two spatially juxtaposed cell types, neuroblasts and Schwann cells, both cell types derive from neural crest (NC) lineage. This composition mimics the architecture of sympathetic ganglions (SG) as well as of adrenal medulla at the late stage of neural crest (NC) development. Similarly to SG, SOX10 is restricted to Schwannian cells and is not present in tumorigenic neuroblasts. Transcriptional landscape of Sox genes can serve as paradigmatic model for stage identification along NC lineage development. While early multipotent NCSCs are characterized by the expression of Sox9/Sox10 transcription factors (TF), committed SA progenitor identity is defined by the presence of Sox4/Sox11 TFs. Molecularly, we show that the core transcriptional network that orchestrate neuroblastoma maintenance is highly reminiscent of the SA progenitors. Taken together, the data presented here show that neuroblastoma cells functionally resemble the committed SA progenitors, while lacking specific stem cell program.

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A novel six-CpGs signature predicts clinical outcome in glioblastomas

Project description:We aimed to identify a clinically useful biomarker using DNA methylation-based information to optimize the management of glioblastoma (GBM) patients. We identified a novel six-CpGs signature that predicts the clinical outcome in GBM. The methylation profiling of 79 GBM patients has been used as a validation cohort to demonstrate the performance and the robustness of the identified six-CpGs signature. The status of the âMGMTâ biomarker, traditionally used by clinicians to predict survival in GBM, is also indicated per sample.

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Host methylation predicts SARS-CoV-2 infection and clinical outcome

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Functional MYCN signature predicts outcome of neuroblastoma irrespective of MYCN amplification.

Project description:Neuroblastoma is a pediatric tumor of the sympathetic nervous system. MYCN (V-myc myelocytomatosis viral-related oncogene, neuroblastoma derived [avian]) is amplified in 20% of neuroblastomas, and these tumors carry a poor prognosis. However, tumors without MYCN amplification also may have a poor outcome. Here, we identified downstream targets of MYCN by shRNA-mediated silencing MYCN in neuroblastoma cells. From these targets, 157 genes showed an expression profile correlating with MYCN mRNA levels in NB88, a series of 88 neuroblastoma tumors, and therefore represent in vivo relevant MYCN pathway genes. This 157-gene signature identified very poor prognosis tumors in NB88 and independent neuroblastoma cohorts and was more powerful than MYCN amplification or MYCN expression alone. Remarkably, this signature also identified poor outcome of a group of tumors without MYCN amplification. Most of these tumors have low MYCN mRNA levels but high nuclear MYCN protein levels, suggesting stabilization of MYCN at the protein level. One tumor has an MYC amplification and high MYC expression. Chip-on-chip analyses showed that most genes in this signature are directly regulated by MYCN. MYCN induces genes functioning in cell cycle and DNA repair while repressing neuronal differentiation genes. The functional MYCN-157 signature recognizes classical neuroblastoma with MYCN amplification, as well as a newly identified group marked by MYCN protein stabilization.

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Project description:In our rabbit model of pulmonary tuberculosis, infection with Mtb HN878, a hyper-virulent W-Beijing strain, results in progressive cavitary disease. However, infection of rabbit lungs with Mtb CDC1551, a hyper-immunogenic strain is effectively controlled overtime, establishing latent Mtb infection. Using these two Mtb strains, we tested the hypothesis that the initial host response in the lungs within hours of infection determines later outcome. The microarray experiments was performed to identify gene expression changes in the Mtb-HN878 or CDC1551- infected rabbit lungs at 3 hours post infection, compared to uninfected naïve rabbit lungs. New Zealand White rabbits were infected with Mtb HN878 or CDC1551 at ~3.5log10. At 3 hours post infection, lung tissue from Mtb-infected and uninfected rabbits were isolated and used for total RNA extraction. Total rabbit lung RNA was used for microarray analysis to determine infection induced changes in host gene expression.

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