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Transcriptomic profiling of human Lung Carcinoids (LCs)

ABSTRACT: Transcriptomic profiling of human Lung Carcinoids (LCs)

PROVIDER: PRJNA484631 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7646230_1.fastq.gz	Fastqsanger.gz
	SRR7646230_2.fastq.gz	Fastqsanger.gz
	SRR7646240_1.fastq.gz	Fastqsanger.gz
	SRR7646240_2.fastq.gz	Fastqsanger.gz
	SRR7646250_1.fastq.gz	Fastqsanger.gz

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Transcriptomic profiling of human Lung Carcinoids (LCs)

Project description:Lung carcinoids (LCs) are rare and slow growing primary lung neoplasms that are understudied. Here, we performed targeted exome sequencing using a 354-cancer gene panel (n=29), mRNA sequencing (n=30) and DNA methylation assay (n=18) on macro-dissected lung carcinoids. The mutations we identified were enriched for genes involved in covalent histone modification/chromatin remodeling (34.5%) (MEN1, ARID1A, KMT2C and KMT2A were recurrently mutated) as well as DNA repair (17.2%) pathways. Unsupervised clustering and principle component analysis on gene expression and DNA methylation profiles showed 3 robust molecular subtypes (LC1, LC2, LC3) with distinct clinical features. MEN1 gene mutations were found to be enriched and exclusively in the LC2 subtype (p-value<0.001). The LC3 subtype is predominately found at endobronchial lung and earlier age of diagnosis. Immunohistochemical staining of two biomarkers, ASCL1 and S100, is sufficient to stratify the three subtypes. This molecular classification of lung carcinoids into three subtypes may help improve treatment decision and clinical management.

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Project description:DNA CpG methylation profiling of LC patients samples were performed to understand genotype to phenotype corrlelations , novel molecular subtypes and cell of origins Lung carcinoids (LCs) are rare and slow growing primary lung neoplasms that are understudied. Here, we performed targeted exome sequencing using a 354-cancer gene panel (n=29), mRNA sequencing (n=30) and DNA methylation assay (n=18) on macro-dissected lung carcinoids. The mutations we identified were enriched for genes involved in covalent histone modification/chromatin remodeling (34.5%) (MEN1, ARID1A, KMT2C and KMT2A were recurrently mutated) as well as DNA repair (17.2%) pathways. Unsupervised clustering and principle component analysis on gene expression and DNA methylation profiles showed 3 robust molecular subtypes (LC1, LC2, LC3) with distinct clinical features. MEN1 gene mutations were found to be enriched and exclusively in the LC2 subtype (p-value<0.001). The LC3 subtype is predominately found at endobronchial lung and earlier age of diagnosis. Immunohistochemical staining of two biomarkers, ASCL1 and S100, is sufficient to stratify the three subtypes. This molecular classification of lung carcinoids into three subtypes may help improve treatment decision and clinical management.

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