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Related Experiment Video

Updated: May 6, 2026

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Engineering High-fidelity Preclinical Mouse Model for Brain Metastasis using Interlock Pulsatile Injection Technique

Yu Bai1, Jialu Xu2, Weihai Ning1

  • 1Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University.

Journal of Visualized Experiments : Jove
|May 4, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new mouse model for brain metastasis research using an Interlock Pulsatile Injection (IPI) technique and microsurgical repair. This refined method improves survival and metastasis establishment rates for better cancer colonization studies.

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Area of Science:

  • Neuroscience
  • Oncology
  • Surgical Innovation

Background:

  • Brain metastasis is a critical clinical challenge with limited high-fidelity research models.
  • Existing models often compromise cerebral hemodynamics and blood-brain barrier integrity due to permanent common carotid artery ligation.

Purpose of the Study:

  • To develop a refined, high-fidelity mouse model for studying brain metastasis.
  • To improve upon traditional models by preserving physiological conditions during tumor cell injection.

Main Methods:

  • Utilized the Interlock Pulsatile Injection (IPI) technique for precise tumor cell delivery.
  • Implemented microsurgical arterial reconstruction to restore common carotid artery (CCA) blood flow post-injection.
  • Avoided permanent CCA ligation to maintain native cerebral hemodynamics and blood-brain barrier (BBB) integrity.

Main Results:

  • Significantly reduced perioperative mortality (2.86% vs. 25.71%) compared to conventional models.
  • Increased the rate of brain metastasis establishment (94.12% vs. 65.38%).
  • Validated intracranial lesions using bioluminescence imaging and histopathology.

Conclusions:

  • The IPI-microsurgical repair method offers a superior platform for brain metastasis research.
  • This model accurately recapitulates the metastatic process, enabling mechanistic insights and preclinical therapeutic evaluation.