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The Tumor Microenvironment02:17

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Related Experiment Video

Updated: Oct 16, 2025

Intracarotid Cancer Cell Injection to Produce Mouse Models of Brain Metastasis
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Intracarotid Cancer Cell Injection to Produce Mouse Models of Brain Metastasis

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Brain Metastases and Microenvironment.

Maria Alexandra Brito1,2

  • 1Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal. abrito@ff.ulisboa.pt.

Advances in Experimental Medicine and Biology
|October 19, 2021
PubMed
Summary
This summary is machine-generated.

Brain metastases are a major concern in cancer survival, yet remain poorly understood. This review details the metastatic cascade and brain tumor microenvironment to improve future treatments.

Keywords:
AstrocytesCancerCross-talkEndothelial cellsExtracellular matrixImmune cellsMacrophagesMetastasisMetastatic cascadeMicroenvironmentMicrogliaNeuronsPericytesPre-metastatic nicheSignaling

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Area of Science:

  • Oncology
  • Cancer Metastasis Research
  • Neuro-oncology

Background:

  • Cancer survival has improved, shifting focus to metastatic disease, particularly brain metastases.
  • Brain metastases present a significant challenge due to poor prognosis, limited biomarkers, and drug delivery issues across the blood-brain barrier.
  • The complex biology of brain metastases, including signaling pathways and cellular interactions, is not well understood.

Purpose of the Study:

  • To summarize current knowledge on cancer and brain metastases.
  • To elucidate the metastatic cascade, focusing on extravasation into the brain.
  • To explore the brain tumor microenvironment and its role in metastasis development.

Main Methods:

  • Literature review and synthesis of existing research on cancer metastasis.
  • Analysis of the metastatic cascade, specifically the extravasation process.
  • Detailed examination of the brain tumor microenvironment, including cellular and acellular components.

Main Results:

  • Cancer patients increasingly face challenges from metastatic disease, especially brain metastases.
  • The extravasation step is critical for brain metastasis formation.
  • The brain tumor microenvironment, including pre-metastatic niches, plays a crucial role in supporting tumor cell development.

Conclusions:

  • A comprehensive understanding of brain metastasis is essential for developing new therapeutic strategies.
  • Further research into the determinants and signaling pathways involved in brain metastasis is needed.
  • Improving the understanding of brain metastasis biology can enhance patient quality of life and expectancy.