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Familial MPN Predisposition.

Tsewang Tashi1, Sabina Swierczek1, Josef T Prchal2

  • 1Division of Hematology and Hematologic Malignancies, University of Utah, Salt Lake City, UT, USA.

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|October 14, 2017
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Summary
This summary is machine-generated.

Germline genetic variants contribute to myeloproliferative neoplasms (MPN) risk, but common mutations like JAK2 are not founder mutations. Further research is needed to fully understand familial MPN genetic predisposition.

Keywords:
Family clustersGermline predispositionJAK2 46/1JAK2 V617FMyeloproliferative neoplasm

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Area of Science:

  • Hematology
  • Genetics
  • Oncology

Background:

  • Myeloproliferative neoplasms (MPN) typically originate from somatic mutations in hematopoietic stem cells, with JAK2, CALR, and cMPL being the most frequent.
  • While somatic mutations drive MPN phenotype, a hereditary predisposition is suspected but not well-established.

Purpose of the Study:

  • To investigate the role of germline genetic variants in the predisposition to clonal myeloproliferative neoplasms.
  • To identify genetic factors contributing to familial MPN risk.

Main Methods:

  • Genome-wide association studies (GWAS) in MPN family clusters.
  • Analysis of genetic variants, including the JAK2 46/1 haplotype and TERT gene variants.

Main Results:

  • GWAS identified several genetic variants associated with an increased germline risk for clonal MPN.
  • The JAK2 46/1 haplotype shows the strongest association with MPN germline risk.
  • Additional risk variants have been found in genes such as TERT.

Conclusions:

  • Germline genetic predisposition plays a role in the development of clonal MPNs.
  • Current identified variants explain only a small portion of familial MPN cases.
  • Whole genome sequencing is crucial for a comprehensive understanding of familial MPN genetic predisposition.