Journal
CURRENT HEMATOLOGIC MALIGNANCY REPORTS
Volume 12, Issue 5, Pages 442-447Publisher
CURRENT MEDICINE GROUP
DOI: 10.1007/s11899-017-0414-x
Keywords
Myeloproliferative neoplasm; Germline predisposition; Family clusters; JAK2 V617F; JAK2 46/1
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Chronic myeloproliferative neoplasms (MPN) characteristically arise from a somatic mutation in the pluripotent hematopoietic stem cell, and most common recurring mutations are in the JAK2, CALR, and cMPL genes. However, these mutations are not founder mutations, but mainly drive the disease phenotype and a pre-existing germline predisposition has been long speculated, but has not been clearly defined to date. Genome-wide association studies in family clusters of MPN have identified a number of genetic variants that are associated with increased germline risk for developing clonal MPN. The strongest association discovered so far is the presence of JAK2 46/1 haplotype, and subsequently, many studies have found additional variants in other genes, most notably in TERT gene. However, these still account for a small fraction of familial MPN, and more in-depth studies including whole genome sequencing are needed to gain better insight into familial genetic predisposition of clonal MPNs.
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