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Biophysical Control of the Glioblastoma Immunosuppressive Microenvironment: Opportunities for Immunotherapy
Landon Teer1, Kavitha Yaddanapudi2,3,4, Joseph Chen1
1Department of Bioengineering, University of Louisville, Louisville, KY 40292, USA.
Abstract:
GBM is the most aggressive and common form of primary brain cancer with a dismal prognosis. Current GBM treatments have not improved patient survival, due to the propensity for tumor cell adaptation and immune evasion, leading to a persistent progression of the disease. In recent years, the tumor microenvironment (TME) has been identified as a critical regulator of these pro-tumorigenic changes, providing a complex array of biomolecular and biophysical signals that facilitate evasion strategies by modulating tumor cells, stromal cells, and immune populations. Efforts to unravel these complex TME interactions are necessary to improve GBM therapy. Immunotherapy is a promising treatment strategy that utilizes a patient's own immune system for tumor eradication and has exhibited exciting results in many cancer types; however, the highly immunosuppressive interactions between the immune cell populations and the GBM TME continue to present challenges. In order to elucidate these interactions, novel bioengineering models are being employed to decipher the mechanisms of immunologically "cold" GBMs. Additionally, these data are being leveraged to develop cell engineering strategies to bolster immunotherapy efficacy. This review presents an in-depth analysis of the biophysical interactions of the GBM TME and immune cell populations as well as the systems used to elucidate the underlying immunosuppressive mechanisms for improving current therapies.
Insights
Glioblastoma (GBM) is aggressive brain cancer. New bioengineering models explore the tumor microenvironment (TME) and immune interactions to overcome treatment resistance and improve immunotherapy for GBM patients.
Area of Science:
- Neuro-oncology
- Cancer Immunology
- Bioengineering
Background:
- Glioblastoma (GBM) is a highly aggressive primary brain cancer with poor patient survival rates.
- Current treatments for GBM are limited by tumor cell adaptation and immune evasion.
- The tumor microenvironment (TME) plays a critical role in regulating GBM progression and immune suppression.
Purpose of the Study:
- To analyze the complex biophysical interactions within the GBM TME and their impact on immune cell populations.
- To elucidate the mechanisms underlying GBM's immunologically "cold" nature.
- To explore how bioengineering models can improve GBM immunotherapy efficacy.
Main Methods:
- Review of current literature on GBM, TME, and immunotherapy.
- Analysis of biophysical interactions between GBM cells, stromal cells, and immune cells.
- Investigation of novel bioengineering models for studying GBM immunology.
Main Results:
- The GBM TME creates a highly immunosuppressive environment, hindering effective anti-tumor immune responses.
- Tumor cell adaptation and immune evasion are key mechanisms of GBM progression.
- Bioengineering approaches offer new ways to understand and potentially overcome GBM's immune resistance.
Conclusions:
- Understanding the biophysical properties of the GBM TME is crucial for developing effective therapies.
- Novel bioengineering models are essential for deciphering GBM's complex immunosuppressive mechanisms.
- Targeting TME-immune cell interactions holds promise for enhancing GBM immunotherapy outcomes.
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