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Related Concept Videos

The Tumor Microenvironment02:17

The Tumor Microenvironment

6.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Related Experiment Video

Updated: Jun 10, 2025

Isolation and Flow Cytometric Analysis of Glioma-infiltrating Peripheral Blood Mononuclear Cells
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Barriers to T Cell Functionality in the Glioblastoma Microenvironment.

Noor E Nader1, Stephen C Frederico1,2,3, Tracy Miller1

  • 1School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.

Cancers
|October 16, 2024
PubMed
Summary

Glioblastoma (GBM) is a challenging brain cancer due to its immunosuppressive microenvironment. Overcoming these barriers is crucial for developing effective immunotherapies to improve patient survival.

Keywords:
CNSGBMT cellbrainglioblastoma

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Area of Science:

  • Neuro-oncology
  • Immunology
  • Cancer Biology

Background:

  • Glioblastoma (GBM) presents a cold tumor microenvironment and low immunogenicity, limiting therapeutic efficacy.
  • The brain's immune-selective nature creates barriers to immune cell infiltration and promotes GBM spread.
  • Standard GBM treatments (surgery, radiation, chemotherapy) offer limited survival benefits, and immune checkpoint blockade has shown minimal success.

Purpose of the Study:

  • To review the physical and immunological barriers hindering effective GBM immunotherapy.
  • To explore potential therapeutic strategies for overcoming these immunosuppressive challenges.
  • To examine current and emerging immunotherapy clinical trials for GBM.

Main Methods:

  • Literature review of GBM's tumor microenvironment and immunological challenges.
  • Analysis of therapeutic mechanisms studied in CNS and non-CNS cancers.
  • Survey of ongoing and prospective clinical trials for GBM immunotherapies.

Main Results:

  • GBM possesses unique physical and immunological barriers that impede T cell responses.
  • Existing immunotherapies have limited efficacy due to these inherent tumor defenses.
  • Various strategies are being investigated to enhance T cell infiltration and activity within the GBM microenvironment.

Conclusions:

  • Developing effective GBM immunotherapies requires overcoming significant immunosuppressive barriers.
  • Tailored treatment approaches are essential to enhance T cell-mediated anti-tumor immunity.
  • Further research into novel immunotherapeutic interventions is critical for improving outcomes in glioblastoma.