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Ultraviolet radiation shapes dendritic cell leukaemia transformation in the skin

ABSTRACT: Ultraviolet radiation shapes dendritic cell leukaemia transformation in the skin

PROVIDER: PRJNA946651 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23917600_1.fastq.gz	Fastqsanger.gz
	SRR23917600_2.fastq.gz	Fastqsanger.gz
	SRR23917601_1.fastq.gz	Fastqsanger.gz
	SRR23917601_2.fastq.gz	Fastqsanger.gz
	SRR23917602_1.fastq.gz	Fastqsanger.gz

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Ultraviolet radiation shapes dendritic cell leukaemia transformation in the skin

Project description:Tumours most often arise from progression of precursor clones within a single anatomical niche. In the bone marrow, clonal progenitors can undergo malignant transformation to acute leukaemia, or differentiate into immune cells that contribute to disease pathology in peripheral tissues. Outside the marrow, these clones are potentially exposed to a variety of tissue-specific mutational processes, although the consequences of this are unclear. Here we investigate the development of blastic plasmacytoid dendritic cell neoplasm (BPDCN)-an unusual form of acute leukaemia that often presents with malignant cells isolated to the skin. Using tumour phylogenomics and single-cell transcriptomics with genotyping, we find that BPDCN arises from clonal (premalignant) haematopoietic precursors in the bone marrow. We observe that BPDCN skin tumours first develop at sun-exposed anatomical sites and are distinguished by clonally expanded mutations induced by ultraviolet (UV) radiation. A reconstruction of tumour phylogenies reveals that UV damage can precede the acquisition of alterations associated with malignant transformation, implicating sun exposure of plasmacytoid dendritic cells or committed precursors during BPDCN pathogenesis. Functionally, we find that loss-of-function mutations in Tet2, the most common premalignant alteration in BPDCN, confer resistance to UV-induced cell death in plasmacytoid, but not conventional, dendritic cells, suggesting a context-dependent tumour-suppressive role for TET2. These findings demonstrate how tissue-specific environmental exposures at distant anatomical sites can shape the evolution of premalignant clones to disseminated cancer.

2023-03-27 | GSE227690 | GEO

Ultraviolet radiation shapes dendritic cell leukaemia transformation in the skin.

Project description:Tumours most often arise from progression of precursor clones within a single anatomical niche. In the bone marrow, clonal progenitors can undergo malignant transformation to acute leukaemia, or differentiate into immune cells that contribute to disease pathology in peripheral tissues1-4. Outside the marrow, these clones are potentially exposed to a variety of tissue-specific mutational processes, although the consequences of this are unclear. Here we investigate the development of blastic plasmacytoid dendritic cell neoplasm (BPDCN)-an unusual form of acute leukaemia that often presents with malignant cells isolated to the skin5. Using tumour phylogenomics and single-cell transcriptomics with genotyping, we find that BPDCN arises from clonal (premalignant) haematopoietic precursors in the bone marrow. We observe that BPDCN skin tumours first develop at sun-exposed anatomical sites and are distinguished by clonally expanded mutations induced by ultraviolet (UV) radiation. A reconstruction of tumour phylogenies reveals that UV damage can precede the acquisition of alterations associated with malignant transformation, implicating sun exposure of plasmacytoid dendritic cells or committed precursors during BPDCN pathogenesis. Functionally, we find that loss-of-function mutations in Tet2, the most common premalignant alteration in BPDCN, confer resistance to UV-induced cell death in plasmacytoid, but not conventional, dendritic cells, suggesting a context-dependent tumour-suppressive role for TET2. These findings demonstrate how tissue-specific environmental exposures at distant anatomical sites can shape the evolution of premalignant clones to disseminated cancer.

| S-EPMC10284703 | biostudies-literature

Genomic Sites Ultrasensitive to Ultraviolet Radiation

Project description:Genomic Sites Ultrasensitive to Ultraviolet Radiation

| PRJNA564830 | ENA

Phosphoproteomics reveals regulation of secondary metabolites in Mahonia bealei under ultraviolet-B radiation

Project description:Mahonia Bealei was used as a traditional Chinese medicine for its high alkaloid content. Previous research found that alkaloid and flavonoid contents in the M. bealei leaves increased under combinatory treatments of ultraviolet B and dark. In order to explore the underlying response mechanism, TiO2 material enrichment and mass-based label-free quantitative proteomics techniques were used for phosphoproteomics analysis of M. bealei leaves under ultraviolet B. ATP content, photosynthetic pigment content, and some enzymatic/non-enzymatic indicators increased in the leaves of M. bealei under UV-B radiation. Phosphoproteomics study found that under the UV-B radiation, phosphoproteins related to MAPK signal transduction and plant hormone brassinosteroid signaling pathway were varied greatly. Phosphoproteins related to photosynthesis, glycolysis, tricarboxylic acid cycle, and amino acid synthesis/metabolism pathway were also significantly changed. These results suggested that the ultraviolet B radiation activated oxidative stress system, MAPK signal transduction pathway, and photosynthetic energy metabolism pathway. These changes are important for the redox reactions in secondary metabolism and the accumulation of secondary metabolites in M. bealei leaves under UV-B radiation.

2022-02-16 | PXD028873 | Pride

Transcription profiling by array of Arabidopsis thaliana Ler and uvr8-2 genotypes exposed to solar ultraviolet radiation

Project description:The experiment was performed to search for genes regulated by the UV RESISTANT LOCUS (UVR8) under solar ultraviolet radiation (UV).

2013-01-15 | E-MTAB-1093 | biostudies-arrayexpress

Expression data from Caenorhabditis elegans L1-stage larvae exposed to ethidium bromide and/or serial ultraviolet C radiation

Project description:Ultraviolet C radiation (UVC) damages the nuclear and mitochondrial genomes; this damage is repaired in the nuclear but not mitochondrial genome. Ethidium bromide (EtBr) inhibits mitochondrial DNA replication. We were interested in the transcriptomic response to exposure to UVC, EtBr, and the combination. The UVC exposure protocol results in a high level of mitochondrial DNA damage, and a low level of nuclear DNA damage (because of repair). We exposed age-matched L1-stage Caenorhabditis elegans to ultraviolet C radiation (UVC ) three times, separated in time by 24 h, in the absence of food. After the third exposure, larvae were placed on K agar plates with OP50 bacterial food. In some cases ethidium bromide was also used. Nematodes were sampled for RNA isolation several times.

2012-10-01 | E-GEOD-38997 | biostudies-arrayexpress

Microarray analysis of Human Epidermal Keratinocytes, neonatal (HEKn) exposed to solar-simulated visible and ultraviolet radiation with and without sunscreen protection.

Project description:Kertinocyte cultures grown in 60 mm petri dishes were placed 186 mm from the solar simulator source (Solar-simulated ultraviolet radiation 1600W Xenon short arc lamp with an Oriel Air Mass 1 Direct Filter, (AM1:D:B; model 81074) and KG2 Short Pass Filter. irradiance 9.84 mW/cm² for UVA (98.3%), 0.174 mW/cm² for UVB (1.7%) and 10 mW/cm² (0.017 mW/cm² erythemally-weighted) for the total UVR irradiance) and received a dose of either 0, 10, 20 and 150 kJ/m2 of unweighted ultraviolet radiation and 0, 10 and 150 kJ/m2 of unweighted ultraviolet radiation with SPF 15 sunscreen filtration (Homosalate 3%, Octisalate 4%, Avobenzone 2%, Titanium dioxide 0.66%) (2 mg/cm2 sandwiched between two 5x5 inch quartz plates) and were temperature controlled at 37oC using a customized water-bath. Six and Twenty-four hours post-exposure cells were harvested and RNA was extracted and subjected to microarray analysis.

2018-09-07 | GSE103621 | GEO

Transcriptomic analysis of grape (Vitis vinifera L.) leaves exposed to ultraviolet C radiation

Project description:Solar ultraviolet C（UV-C）radiation reaching the Earth’s surface is little due to the filtering effects of the stratospheric ozone layer. At present, artificial UV-C irradiation is utilized for different biological processes. Grape is a major fruit crop around the world. Research has shown that UV-C irradiation induced the biosynthesis of phenols. However, changes at the molecular level in response to UV-C and leading to these effects are poorly understood. To elucidate the effect of UV-C on expression of genes in grape and the response mechanism, transcript abundance of grape (Vitis vinifera L.) leaves was quantified using the Affymetrix Grape Genome oligonucleotide microarray (15,700 transcripts)

2014-11-15 | GSE62315 | GEO

The 7SK/P-TEFb snRNP controls ultraviolet radiation-induced transcriptional reprogramming

Project description:Releasing promoter-proximally-paused RNA polymerase II (RNAPII) by the positive transcription elongation factor b (P-TEFb) is a central regulatory step of eukaryotic mRNA synthesis. The nuclear activity of P-TEFb is controlled mainly by the 7SK small nuclear RNP (snRNP) which sequesters active P-TEFb into inactive 7SK/P-TEFb snRNP. Here we demonstrate that under normal culture conditions, the lack of 7SK snRNP has only a minor impact on global RNAPII transcription and promoter-proximal pausing without detectable consequences on cell growth and proliferation. However, upon ultraviolet (UV) light-induced DNA damage, cells lacking 7SK have a defective transcriptional response and highly reduced viability. Both UV-induced release of ‘lesion-scanning’ polymerases and activation of key early responsive genes are compromised in the absence of 7SK. We show that proper induction of 7SK-dependent UV-responsive genes, namely efficient release of paused RNAPII and recruitment of key elongation factors, requires P-TEFb activity directly mobilized from the nucleoplasmic 7SK/P-TEFb snRNP.

2021-03-30 | GSE147055 | GEO

The 7SK/P-TEFb snRNP controls ultraviolet radiation-induced transcriptional reprogramming

Project description:The 7SK/P-TEFb snRNP controls ultraviolet radiation-induced transcriptional reprogramming

| PRJNA612855 | ENA