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Updated: Aug 4, 2025

In Vitro Tumor Cell Rechallenge For Predictive Evaluation of Chimeric Antigen Receptor T Cell Antitumor Function
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In Vitro Tumor Cell Rechallenge For Predictive Evaluation of Chimeric Antigen Receptor T Cell Antitumor Function

Published on: February 27, 2019

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Clonal differences underlie variable responses to sequential and prolonged treatment

Dylan L Schaff, Aria J Fasse, Phoebe E White

    Biorxiv : the Preprint Server for Biology
    |March 30, 2023
    PubMed

    Insights

    Cancer cell heterogeneity drives treatment resistance. Clones respond differently to subsequent therapies, guiding future treatment selection for aggressive cancer cells.

    Area of Science:

    • Oncology
    • Genomics
    • Cell Biology

    Background:

    • Cancer cells display significant single-cell gene expression variability, influencing treatment resistance.
    • Treatment can exacerbate this heterogeneity, leading to diverse resistant cell states.
    • The distinct responses of these resistant clones to further or continued treatment are not well understood.

    Approach:

    • Utilized single-cell RNA-sequencing combined with barcoding techniques.
    • Tracked the evolution of resistant cancer clones under prolonged and sequential treatment conditions.
    • Analyzed gene expression states to identify predictors of clone survival.

    Key Points:

    • Cells within the same clone maintain similar gene expression profiles after multiple treatment rounds.
    • Individual clones exhibit distinct and varied outcomes (growth, survival, death) upon re-treatment or continued therapy.
    • Identified specific gene expression signatures associated with clone survival.

    Conclusions:

    • Cancer clone heterogeneity dictates differential responses to therapeutic interventions.
    • Understanding clone-specific fates is crucial for developing targeted cancer therapies.
    • This research lays the groundwork for selecting optimal treatments against aggressive resistant clones.

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