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Related Experiment Video

Updated: Mar 3, 2026

Use of Hematopoietic Stem Cell Transplantation to Assess the Origin of Myelodysplastic Syndrome
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Clonal evolution in myelodysplastic syndromes.

Pedro da Silva-Coelho1,2, Leonie I Kroeze1, Kenichi Yoshida3

  • 1Laboratory of Hematology, Radboud University Medical Center, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, The Netherlands.

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|April 22, 2017
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Summary
This summary is machine-generated.

Cancer evolution in myelodysplastic syndrome (MDS) shows linear and branched patterns, influenced by treatment. Genetic monitoring can detect resistance and progression markers early, guiding therapy decisions.

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Area of Science:

  • Hematology
  • Oncology
  • Genetics

Background:

  • Cancer develops through accumulating mutations, leading to malignant cell characteristics.
  • Myelodysplastic syndromes (MDS) are a group of cancers in which immature blood cells in the bone marrow do not mature and therefore do not become healthy blood cells.
  • Understanding clonal evolution is crucial for managing hematologic malignancies.

Purpose of the Study:

  • To investigate the clonal evolution patterns in myelodysplastic syndrome (MDS) patients.
  • To analyze the impact of supportive care and lenalidomide treatment on cancer evolution.
  • To identify early genetic markers for treatment resistance and disease progression in MDS.

Main Methods:

  • Whole-exome sequencing and targeted deep sequencing were performed on patient samples.
  • Multiple time points during the disease course were analyzed to capture dynamic changes.
  • Longitudinal follow-up of patients receiving supportive care with or without lenalidomide (2.5-11 years).

Main Results:

  • Both linear and branched clonal evolution patterns were observed in MDS patients, irrespective of treatment.
  • Disease-modifying therapy can induce an evolutionary bottleneck, potentially leading to the emergence of more complex MDS or unrelated clones.
  • Subclonal mutations associated with treatment resistance (e.g., TP53) or progression (e.g., NRAS, KRAS) were detectable months before clinical manifestation.

Conclusions:

  • Clonal evolution in MDS is complex and can follow diverse patterns.
  • Treatment can influence evolutionary trajectories, creating bottlenecks and potentially new clone emergence.
  • Longitudinal genetic monitoring offers potential for early detection of resistance and progression, aiding clinical decision-making in MDS management.