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Related Concept Videos

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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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
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Related Experiment Video

Updated: Jan 4, 2026

HLA-Ig Based Artificial Antigen Presenting Cells for Efficient ex vivo Expansion of Human CTL
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Pathogen-Boosted Adoptive Cell Transfer Therapy Induces Endogenous Antitumor Immunity through Antigen Spreading.

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Re-energized Adoptive Cell Therapy (ReACT) prevents tumor cell antigen loss by broadening immune response. This approach generates durable memory T cells, crucial for overcoming immunotherapy resistance and preventing cancer relapse.

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Area of Science:

  • Immunology
  • Cancer Research
  • Cell Therapy

Background:

  • Adoptive cell therapy (ACT) faces challenges due to tumor cell antigen loss.
  • Broadening immune response to multiple tumor-associated antigens (TAAs) is key to overcoming this limitation.

Purpose of the Study:

  • To evaluate the efficacy of Re-energized ACT (ReACT) in preventing antigen loss variants.
  • To investigate the role of Batf3-driven cDC1s in ReACT-mediated antitumor responses.
  • To assess the generation of memory T cells and long-term protection against tumor recurrence.

Main Methods:

  • Utilized ReACT, combining pathogen-based immunotherapy with ACT.
  • Employed a B16-F10 melanoma mouse model.
  • Conducted selective depletion experiments to identify key immune cell populations (Batf3-driven cDC1s).

Main Results:

  • ReACT induced endogenous CD8+ T-cell responses targeting additional TAAs, preventing antigen loss variant outgrowth.
  • Batf3-driven cDC1s were essential for activating endogenous tumor-specific CD8+ T cells.
  • ReACT treatment led to the generation of memory CD8+ T cells, enabling rejection of subsequent tumor challenges.

Conclusions:

  • ReACT provides broader TAA coverage, countering antigen escape in ACT.
  • This strategy generates a durable memory response against local relapse and metastasis.
  • ReACT offers a promising approach to enhance the efficacy and durability of cancer immunotherapy.