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Related Concept Videos

The Tumor Microenvironment02:17

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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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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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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
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Updated: Feb 16, 2026

Studying the Effects of Tumor-Secreted Paracrine Ligands on Macrophage Activation using Co-Culture with Permeable Membrane Supports
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The tumor microenvironment: Thousand obstacles for effector T cells.

Chiara Massa1, Barbara Seliger1

  • 1Institute for Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.

Cellular Immunology
|December 19, 2017
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Tumors can evade the immune system through suppressive cells and checkpoint molecules. Current research explores strategies to overcome these mechanisms and enhance anti-tumor immune responses, particularly involving effector T cells.

Keywords:
Effector T cellsImmune check pointTumor microenvironment

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Area of Science:

  • Immunology
  • Cancer Biology
  • Oncology

Background:

  • The immune system can identify and eliminate cancer cells, yet tumors often progress despite immune cell presence.
  • Tumor progression involves immune suppressive cells and intrinsic regulation by immune checkpoint molecules.
  • Tumor cells actively alter the tumor microenvironment, hindering immune effector functions.

Purpose of the Study:

  • To elucidate the mechanisms by which tumors evade immune surveillance.
  • To identify strategies for overcoming immune suppression in the tumor microenvironment.
  • To explore methods for enhancing effector T cell activity against tumors.

Main Methods:

  • Review of current literature on tumor immunology and immune evasion.
  • Analysis of molecular and cellular mechanisms of immune suppression.
  • Evaluation of clinical approaches targeting immune checkpoints and tumor microenvironment.

Main Results:

  • Immune effector cells are regulated by suppressive cell subsets and immune checkpoints.
  • Tumor cells secrete immune modulators and alter metabolism to create an immunosuppressive microenvironment.
  • Clinical strategies aim to release the brakes on effector T cells.

Conclusions:

  • Understanding tumor immune evasion is crucial for developing effective cancer therapies.
  • Targeting immune checkpoints and the tumor microenvironment can restore anti-tumor immunity.
  • Enhancing effector T cell function holds significant promise for cancer treatment.