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Updated: Jul 24, 2025

Characterizing Mutational Load and Clonal Composition of Human Blood
07:58

Characterizing Mutational Load and Clonal Composition of Human Blood

Published on: July 11, 2019

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Germline predisposition to clonal hematopoiesis

Jie Liu1, Afaf E G Osman2, Kelly Bolton1

  • 1Division of Oncology, Department of Medicine, Washington University School of Medicine, St Louis, MO, USA.

Leukemia Research
|July 8, 2023
PubMed

Insights

Aging hematopoietic stem cells can acquire mutations, leading to clonal hematopoiesis (CH). Inherited genetic factors, particularly variants near TERT and ATM, strongly predispose individuals to CH and associated health risks.

Area of Science:

  • Hematology
  • Genetics
  • Aging Research

Background:

  • Hematopoietic stem and progenitor cells (HSPCs) accumulate mutations with age.
  • This accumulation leads to clonal hematopoiesis (CH), a process involving advantageous mutations and clonal expansion.
  • CH is linked to increased risks of cancer, cardiovascular disease, and inflammatory conditions.

Purpose of the Study:

  • To review the current understanding of inherited genetic factors predisposing to CH.
  • To highlight key genes and DNA variants associated with CH development.
  • To discuss the implications of germline predisposition for age-related diseases.

Main Methods:

  • Literature review of studies on clonal hematopoiesis and germline genetics.
  • Analysis of genetic association data for CH-predisposing variants.
  • Synthesis of current knowledge on the biological mechanisms linking germline variants to HSPC function.

Main Results:

  • Specific DNA variants near genes such as TERT, SMC4, KPNA4, IL12A, CD164, and ATM show strong associations with CH.
  • Germline predisposition plays a significant role in the development of CH.
  • Understanding these inherited alleles is crucial for risk stratification and potential interventions.

Conclusions:

  • Germline genetic factors are critical determinants of an individual's susceptibility to developing clonal hematopoiesis with age.
  • Identifying these predisposition alleles offers insights into the pathogenesis of CH and associated morbidities.
  • Further research into these inherited variants can inform strategies for preventing or mitigating age-related diseases linked to CH.

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