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Developing a preclinical platform for image-guided radiation therapy (RT) in Kras-driven non-small cell lung cancer mouse models improves translational research. These models show Kras-driven tumors can be stabilized by RT, but Lkb1 or p53 loss reduces responsiveness.

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Area of Science:

  • Oncology
  • Translational Cancer Research
  • Preclinical Models

Background:

  • Accurate preclinical models are crucial for effective translational cancer research.
  • Kras-driven mouse models of non-small cell lung cancer (NSCLC) predict chemotherapy response but are limited for radiotherapy (RT) studies due to multifocal disease.
  • A need exists for preclinical models that accurately mimic human focal radiotherapy treatment and outcomes.

Purpose of the Study:

  • To develop a preclinical platform for image-guided RT in Kras-driven NSCLC mouse models.
  • To enable studies of focal radiotherapy outcomes in genetically engineered mouse models.
  • To evaluate the efficacy of different RT regimens in these models.

Main Methods:

  • Developed a method to induce single, localized Kras-driven tumors in mice using adenoviral Cre recombinase.
  • Implemented state-of-the-art, image-guided, three-dimensional conformal radiation therapy planning and delivery, mirroring human protocols.
  • Assessed treatment efficacy using two distinct radiation regimens.

Main Results:

  • The developed platform successfully delivered image-guided RT to Kras-driven NSCLC mouse models.
  • Kras-driven tumors demonstrated temporary stabilization following RT.
  • Tumors with additional loss of Lkb1 or p53 exhibited reduced responsiveness to RT.

Conclusions:

  • The novel preclinical platform enables precise, image-guided RT studies in Kras-driven NSCLC mouse models.
  • These models provide valuable insights into tumor response to RT, highlighting the impact of genetic alterations like Lkb1 or p53 loss.
  • This platform enhances the predictive value of murine models for human lung cancer radiotherapy research.