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Clonal hematopoiesis of indeterminate potential and risk of immune thrombocytopenia

Qianwei Liu1,2, Tove Wästerlid3, Karin E Smedby3

  • 1Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China.

Journal of Internal Medicine
|April 30, 2025
PubMed

Insights

Individuals with clonal hematopoiesis of indeterminate potential (CHIP) face a significantly higher risk of developing immune thrombocytopenia (ITP). This increased risk is particularly pronounced in cases involving JAK2 or SRSF2 mutations.

Area of Science:

  • Hematology
  • Genetics
  • Immunology

Background:

  • Clonal hematopoiesis of indeterminate potential (CHIP) is a condition where specific gene mutations lead to the overproduction of certain blood cells.
  • CHIP may influence immune function and platelet production, potentially linking it to immune thrombocytopenia (ITP).
  • The precise risk of developing ITP in individuals with CHIP remains largely uncharacterized.

Purpose of the Study:

  • To determine the association between CHIP and the subsequent risk of developing ITP.
  • To identify specific CHIP mutations that may confer a higher risk of ITP.

Main Methods:

  • A prospective cohort study utilizing UK Biobank data from 466,064 participants (2006-2022).
  • CHIP status was determined via whole exome sequencing.
  • Incident ITP cases were identified through hospital records and death registries.
  • Cox regression models were employed to assess ITP risk, with subgroup analyses for common CHIP mutations (DNMT3A, TET2, ASXL1, SRSF2, JAK2).

Main Results:

  • The study included 14,466 individuals with CHIP and 451,598 without.
  • CHIP was associated with a 2.33-fold increased risk of ITP (HR 2.33, 95% CI: 1.64-3.32).
  • The highest ITP risk was observed in CHIP with JAK2 (HR 54.31) and SRSF2 (HR 20.11) mutations, followed by TET2 (HR 4.00) and DNMT3A (HR 1.95) mutations.

Conclusions:

  • CHIP significantly increases the risk of ITP diagnosis.
  • Individuals with JAK2 or SRSF2 mutations within CHIP exhibit a markedly elevated risk of ITP.
  • Clinical vigilance for ITP is warranted in patients diagnosed with CHIP.
Abstract

Keywords:
clonal hematopoiesiscohort studyepidemiologyimmune thrombocytopenia

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