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Clonal differences underlie variable responses to sequential and prolonged treatment.

Dylan L Schaff1, Aria J Fasse2, Phoebe E White3

  • 1Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19146, USA.

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This summary is machine-generated.

Cancer cells show diverse gene expression that predicts treatment resistance. Clones maintain similar states but have distinct fates under continued or new therapies, guiding optimal treatment selection.

Keywords:
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Area of Science:

  • Oncology
  • Genomics
  • Cell Biology

Background:

  • Cancer cells display significant single-cell gene expression heterogeneity, influencing treatment resistance.
  • Therapeutic interventions can exacerbate this heterogeneity, leading to diverse resistant cell states.
  • The long-term fate of these resistant clones under varied treatment pressures remains incompletely understood.

Purpose of the Study:

  • To investigate the stability of gene expression states in cancer clones during prolonged and sequential treatments.
  • To determine if distinct resistant clones exhibit differential responses to subsequent therapeutic challenges.
  • To identify predictive gene expression markers for clone survival and therapeutic targeting.

Main Methods:

  • Utilized single-cell RNA sequencing combined with DNA barcoding.
  • Tracked the evolution of resistant cancer clones through multiple treatment cycles.
  • Analyzed gene expression profiles to correlate states with clone fate.

Main Results:

  • Cells within the same clone maintained consistent gene expression profiles after repeated treatments.
  • Individual clones demonstrated unique and divergent responses (growth, survival, death) to secondary treatments or prolonged initial treatment.
  • Identified specific gene expression signatures associated with clone survival.

Conclusions:

  • Cancer clone heterogeneity, while stable within clones, leads to distinct therapeutic vulnerabilities.
  • Understanding clone-specific responses is crucial for developing effective, personalized cancer therapies.
  • This study provides a basis for selecting therapies targeting aggressive resistant clones.