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Genotype-immunophenotype relationships in NPM1-mutated AML clonal evolution uncovered by single-cell multiomic

Morgan Drucker1,2, Darren Lee3, Michael S Bowman4

  • 1Division of Oncology, Cancer and Blood Disease Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.

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Summary
This summary is machine-generated.

Acute myeloid leukemia (AML) is a complex disease. Signaling mutations at relapse increase AML clonal complexity, impacting survival and revealing hard-wired genotype-immunophenotype relationships.

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Area of Science:

  • Hematology
  • Cancer Biology
  • Genomics

Background:

  • Acute myeloid leukemia (AML) is a multi-clonal hematopoietic malignancy.
  • Bulk sequencing methods limit understanding of AML clonal architecture and evolution during therapy.
  • NPM1-mutated AML presents a unique model to study clonal dynamics.

Purpose of the Study:

  • To investigate the clonal evolution and genotype-immunophenotype relationships in NPM1-mutated AML.
  • To analyze how clonal complexity changes from diagnosis to relapse and during treatment.
  • To understand the impact of signaling mutations on AML progression and patient survival.

Main Methods:

  • Simultaneous single-cell molecular profiling and immunophenotyping.
  • Analysis of 43 samples from 32 NPM1-mutated AML patients at various disease stages.
  • Longitudinal sampling during front-line AML therapy.

Main Results:

  • Diagnosis and relapse AML samples share similar clonal architecture.
  • Signaling mutations significantly increase clonal complexity at relapse, correlating with overall survival.
  • Unique genotype-immunophenotype relationships were identified, suggesting mutation-driven lineage trajectories.
  • Dynamic clonal and immunophenotypic changes were observed during therapy.

Conclusions:

  • Clonal architecture in NPM1-mutated AML is influenced by signaling mutations, particularly at relapse.
  • Genotype-immunophenotype correlations are established early and persist throughout disease progression.
  • Single-cell profiling provides critical insights into AML clonal dynamics and therapeutic response.