Detecting and quantifying clonal selection in somatic mosaicism

In this study, we introduce a scalable method to identify clonal selection in an individual tissue, agnostic of the underlying mutations. To study clonal selection in the haematopoietic system, we performed whole genome sequencing on bone marrow CD34+ haematopoietic stem and progenitor cells from 22 non-leukemic individuals, 30-89 years of age. We performed 90x whole genome sequencing for all samples and re-sequenced 19 samples with sufficient DNA to a total target coverage of 270x. Whole genome sequencing of hair follicle DNA from the same individuals was used as germline control. In addition, we sequenced unseparated bone marrow mononuclear cells, CD3-CD34- bone marrow mononuclear cells, and peripheral blood granulocytes from 14 samples. Samples were collected from individuals undergoing hip replacement surgery as part of the Mechanisms of Age-Related Clonal Haematopoiesis (MARCH) Study (REC Ref: 17/YH/0382).

Type: Other
Archiver: European Genome-Phenome Archive (EGA)

1 Dataset

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Dataset ID	Description	Technology	Samples
EGAD00001015178	This dataset contains whole genome sequencing data from 22 samples of FACS-purified bone marrow CD34+ haematopoietic stem and progenitor cells and matched hair follicle controls collected from individuals undergoing hip replacement surgery. Additionally, it contains whole genome sequencing data from unseparated bone marrow mononuclear cells, CD3-CD34- bone marrow mononuclear cells, and peripheral blood granulocytes of the same 14 samples. Haematopoietic samples were sequenced to a target coverage of 90-120x; 19 of them were re-sequenced to a total target coverage of 270x. Hair follicle controls were sequenced to a target coverage of 30x.	Illumina NovaSeq 6000	59