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Clonal hematopoiesis as a pitfall in germline variant interpretation in the context of Mendelian disorders.
Hum. Mol. Genet. 31, 2386-2395 (2022)
Clonal hematopoiesis due to somatic mutations in hematopoietic stem/progenitor cells is an age-related phenomenon and commonly observed when sequencing blood DNA in elderly individuals. Several genes that are implicated in clonal hematopoiesis are also associated with Mendelian disorders when mutated in the germline, potentially leading to variant misinterpretation. We performed a literature search to identify genes associated with age-related clonal hematopoiesis followed by an OMIM query to identify the subset of genes in which germline variants are associated with Mendelian disorders. We retrospectively screened for diagnostic cases in which the presence of age-related clonal hematopoiesis confounded exome sequencing data interpretation. We found 58 genes in which somatic mutations are implicated in clonal hematopoiesis while germline variants in the same genes are associated with Mendelian (mostly neurodevelopmental) disorders. Using five selected cases of individuals with suspected monogenic disorders, we illustrate how clonal hematopoiesis in either variant databases or exome sequencing datasets poses a pitfall, potentially leading to variant misclassification and erroneous conclusions regarding gene-disease associations.
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Publication type
Article: Journal article
Document type
Scientific Article
Language
english
Publication Year
2022
HGF-reported in Year
2022
ISSN (print) / ISBN
0964-6906
e-ISSN
1460-2083
Journal
Human Molecular Genetics
Quellenangaben
Volume: 31,
Issue: 14,
Pages: 2386-2395
Publisher
Oxford University Press
Reviewing status
Peer reviewed
Institute(s)
Institute of Neurogenomics (ING)
POF-Topic(s)
30205 - Bioengineering and Digital Health
Research field(s)
Genetics and Epidemiology
PSP Element(s)
G-503200-001
G-503292-001
G-503292-001
WOS ID
WOS:000770414000001
PubMed ID
35179199
Erfassungsdatum
2022-06-28