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Genome-wide DNA methylation profiling of cell-free DNA in nipple aspirate fluid for breast cancer

ABSTRACT: Genome-wide DNA methylation profiling of cell-free DNA in nipple aspirate fluid for breast cancer

PROVIDER: PRJNA997370 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25387835_1.fastq.gz	Fastqsanger.gz
	SRR25387835_2.fastq.gz	Fastqsanger.gz
	SRR25387836_1.fastq.gz	Fastqsanger.gz
	SRR25387836_2.fastq.gz	Fastqsanger.gz
	SRR25387837_1.fastq.gz	Fastqsanger.gz

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Genome-wide DNA methylation profiling of cell-free DNA in nipple aspirate fluid for breast cancer

Project description:Nipple aspriate fluid (NAF) were obtained from 7 women including 3 breast cancer patients. Cell-free DNA (cfDNA) were isolated and bisulfite sequencing using Illumina HiSeq X Ten platform.

2023-09-26 | GSE238014 | GEO

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Proteomic Profiling of the Human Tissue and Biological Fluid Proteome

Project description:Here, we performed label-free liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) to profile the normal human proteome. In total, we analyzed 117 samples from 46 histologically normal tissues and organs at autopsy. Our high-resolution MS approach allowed for the quantification of 10,438 unique proteins. In order to expand our coverage of the human proteome, we combined our previously published biological fluid proteomic data from healthy individuals. We considered data from seven biological fluids, including urine, cerebrospinal fluid, synovial fluid, seminal plasma, sweat, cervical vaginal fluid, and nipple aspirate fluid. Overall, we generated tandem mass spectra corresponding to 13,028 unique human protein-coding genes.

2020-10-29 | PXD020192 | Pride

Cerebrospinal fluid cell-free DNA methylomes subtyping pediatric medulloblastoma

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Reliable tumor detection using cerebrospinal fluid cell-free DNA methylomes in pediatric medulloblastoma

Project description:Medulloblastoma (MB) is an embryonal tumor of the cerebellum and a highly malignant childhood brain tumor. Cell-free circulating tumor DNA (ctDNA) from the cerebrospinal fluid (CSF) of patients with brain tumors faithfully represent genomic alterations of brain tumors. Distinct epigenetic signatures among subgroups of MB allow us to detect epigenetic alterations in CSF to aid classify and guide therapy of MB tumors. Here, we evaluate DNA methylation and hydroxymethylation of ctDNA derived from small amount of CSF (200 µL) and matched tumor DNA from 3 MB patients. We find highly concordance of DNA methylation and hydroxymethylation between CSF ctDNA and tumor DNA, especially in CpG islands. Importantly, CSF ctDNA can mostly recapitulate the dynamic changes of DNA methylation and hydroxymehtylation in tumor species compared to healthy cerebellums. Those MB tumor signature CpGs’ DNA methylation status are recovered in CSF ctDNA can clearly distinguish MB subgroups by utilizing public large cohort data. We further identified potential diagnostic and prognostic DNA methylation markers in CSF ctDNA. Our results show that CSF ctNDA methylation and hydroxymethylation can be a minimal invasive method to assess epigenetic alterations of MB, which is complementary to current diagnoses of MB tumors.

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Global Gene Expression Analysis of Term Amniotic Fluid Cell-Free Fetal RNA

Project description:The objective of this study was to identify the tissue expression patterns and biological pathways enriched in term amniotic fluid cell-free fetal RNA by comparing functional genomic analyses of term and second-trimester amniotic fluid supernatants. There were 2,871 significantly differentially regulated genes. In term amniotic fluid, tissue expression analysis showed enrichment of salivary gland, tracheal, and renal transcripts as compared with brain and embryonic neural cells in the second trimester. Functional analysis of genes upregulated at term revealed pathways that were highly specific for postnatal adaptation such as immune function, digestion, respiration, carbohydrate metabolism, and adipogenesis. Inflammation and prostaglandin synthesis, two key processes involved in normal labor, were also activated in term amniotic fluid. This was a prospective whole genome microarray study comparing eight amniotic fluid samples collected from eight women at term who underwent prelabor cesarean delivery and eight second-trimester amniotic fluid samples from routine amniocenteses. A functional annotation tool was used to compare tissue expression patterns in term and second-trimester samples. Pathways analysis software identified physiologic systems, molecular and cellular functions, and upstream regulators that were significantly overrepresented in term amniotic fluid.

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