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RNAseq of a cohort series of 18 pediatric MBs in Taiwan

ABSTRACT: RNAseq of a cohort series of 18 pediatric MBs in Taiwan

PROVIDER: PRJNA665195 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12697134_1.fastq.gz	Fastqsanger.gz
	SRR12697134_2.fastq.gz	Fastqsanger.gz
	SRR12697135_1.fastq.gz	Fastqsanger.gz
	SRR12697135_2.fastq.gz	Fastqsanger.gz
	SRR12697136_1.fastq.gz	Fastqsanger.gz

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RNAseq of a cohort series of 18 pediatric MBs in Taiwan

Project description:Background: Since 2016, a project for molecular diagnosis of childhood medulloblastoma (MB) was initiated in Taiwan. We aimed to integrate molecular classification, molecular and clinical risk factors, somatic mutations, and phenotypic traits for up to date adaptive care. Method: 18 MBs in children with frozen tumor tissue were assembled. Clinical data were retrieved. RNA-Seq and DNA methylation array data were generated. Molecular subgrouping and molecular-clinical correlation were performed. Subgroup-based risk stratification included an adjusted Heidelberg risk stratification scheme were defined and evaluated. We selected 51 genes for somatic variant calling using RNA-Seq. Relevant phenotypic traits were defined for the linkage of genetic predisposition. Results: Four core molecular subgroups (WNT, SHH, Group 3, and Group 4) were identified. Genetic backgrounds of metastasis at diagnosis and extent of tumor resection were observed. The overall survivals of the adjusted Heidelberg scheme matched with the definition of each risk subgroups. Somatic mutations in DNA damage response were detected. Conclusion: The findings of this study provide valuable information for adaptive risk stratified treatment and personalized care of childhood MBs in our cohort series and in Taiwan.

2022-05-18 | GSE158413 | GEO

RNAseq of a cohort series of 52 pediatric MBs in Taiwan

Project description:Background: Since 2016, a project for molecular diagnosis of childhood medulloblastoma (MB) was initiated in Taiwan. We aimed to integrate molecular classification, molecular and clinical risk factors, somatic mutations, and phenotypic traits for up to date adaptive care. Method: Fifty-two MBs in children with frozen tumor tissue were assembled. Clinical data were retrieved. RNA-Seq and DNA methylation array data were generated. Molecular subgrouping and molecular-clinical correlation were performed. Subgroup-based risk stratification included an adjusted Heidelberg risk stratification scheme were defined and evaluated. We selected 51 genes for somatic variant calling using RNA-Seq. Relevant phenotypic traits were defined for the linkage of genetic predisposition. Results: Four core molecular subgroups (WNT, SHH, Group 3, and Group 4) were identified. Genetic backgrounds of metastasis at diagnosis and extent of tumor resection were observed. The overall survivals of the adjusted Heidelberg scheme matched with the definition of each risk subgroups. Somatic mutations in DNA damage response were detected. Five patients with SHH MB presented potential genetic predisposition and three patients had related germline mutations. Conclusion: The findings of this study provide valuable information for adaptive risk stratified treatment and personalized care of childhood MBs in our cohort series and in Taiwan.

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Project description:In 2016, a project was initiated in Taiwan to adopt molecular diagnosis of childhood medulloblastoma (MB). In this study, we aimed to identify a molecular-clinical correlation and somatic mutation for exploring risk-adapted treatment, drug targets, and potential genetic predisposition. In total, 52 frozen tumor tissues of childhood MBs were collected. RNA sequencing (RNA-Seq) and DNA methylation array data were generated. Molecular subgrouping and clinical correlation analysis were performed. An adjusted Heidelberg risk stratification scheme was defined for updated clinical risk stratification. We selected 51 genes for somatic variant calling using RNA-Seq data. Relevant clinical findings were defined. Potential drug targets and genetic predispositions were explored. Four core molecular subgroups (WNT, SHH, Group 3, and Group 4) were identified. Genetic backgrounds of metastasis at diagnosis and extent of tumor resection were observed. The adjusted Heidelberg scheme showed its applicability. Potential drug targets were detected in the pathways of DNA damage response. Among the 10 patients with SHH MBs analyzed using whole exome sequencing studies, five patients exhibited potential genetic predispositions and four patients had relevant germline mutations. The findings of this study provide valuable information for updated risk adapted treatment and personalized care of childhood MBs in our cohort series and in Taiwan.

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