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Related Concept Videos

The Tumor Microenvironment02:17

The Tumor Microenvironment

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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

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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

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Visualization, Quantification, and Mapping of Immune Cell Populations in the Tumor Microenvironment
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[Immune cell contexture in the tumor microenvironment].

Shin-Ichiro Fujii1,2

  • 1Laboratory for Immunotherapy, RIKEN Center for Integrative Medical Sciences (IMS).

[Rinsho Ketsueki] the Japanese Journal of Clinical Hematology
|November 9, 2020
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Understanding the tumor microenvironment (TME) is crucial for effective cancer immunotherapy. Modulating immunosuppressive cells and enhancing anti-tumor immune responses are key to improving treatments like checkpoint blockade.

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Area of Science:

  • Immunology
  • Oncology
  • Cancer Research

Background:

  • Antitumor immune responses are often suppressed within the tumor microenvironment (TME) by various immunosuppressive cells.
  • These cells, including regulatory T cells, myeloid-derived suppressor cells, and tumor-associated macrophages, hinder the function of antigen-presenting cells and effector T cells.

Purpose of the Study:

  • To discuss strategies for overcoming immunosuppressive conditions in the TME for successful cancer immunotherapy.
  • To evaluate the influence of immune regulatory and stimulatory cells on immune dynamics within the TME.
  • To explore the relationship between therapeutic interventions and subsequent immune responses, particularly concerning tumor cell death and antigen presentation.

Main Methods:

  • Review and discussion of existing literature on tumor microenvironment modulation.
  • Analysis of the roles of various immune cells in cancer immunity.
  • Examination of the impact of therapeutic strategies on immune responses.

Main Results:

  • The TME is a complex environment with cells that can suppress or stimulate anti-tumor immunity.
  • Checkpoint blockade therapy can reactivate T cells but has limitations.
  • Anticancer agents can induce immunogenic cell death, potentially enhancing secondary immune responses.

Conclusions:

  • Modulating the TME is essential for improving cancer immunotherapy efficacy.
  • Understanding the interplay of immune cells within the TME is critical for developing novel therapeutic approaches.
  • Targeting immunosuppressive conditions and optimizing immune responses holds promise for future cancer treatments.