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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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.
Naive T cells that have not yet encountered an antigen express two primary CD...
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Cytotoxic T Cells-mediated Immune Response01:27

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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.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
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Related Experiment Video

Updated: Aug 16, 2025

Immunostimulatory Agent Evaluation: Lymphoid Tissue Extraction and Injection Route-Dependent Dendritic Cell Activation
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Immunostimulatory Agent Evaluation: Lymphoid Tissue Extraction and Injection Route-Dependent Dendritic Cell Activation

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Dendritic Cell Membrane-Derived Nanovesicles for Targeted T Cell Activation.

Brock T Harvey1, Xu Fu2, Lan Li1

  • 1Department of Chemistry, College of Arts and Sciences, University of Kentucky, Lexington, Kentucky 40506, United States.

ACS Omega
|December 26, 2022
PubMed
Summary

Researchers developed novel dendritic cell-derived nanovesicles using nitrogen cavitation. These nanovesicles effectively activate antigen-specific T cells and offer a scalable platform for cancer immunotherapy.

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Area of Science:

  • Immunology
  • Biotechnology
  • Nanomedicine

Background:

  • T cells are crucial for adaptive immunity, clearing pathogens and directing immune responses.
  • Dendritic cells and their vesicles are explored for cancer immunotherapy, but current methods face production and application challenges.
  • Exosomes and synthetic nanoparticles have limitations in scalability and clinical use.

Purpose of the Study:

  • To engineer dendritic cell-derived nanovesicles with properties similar to exosomes.
  • To overcome production constraints of current immunomodulatory platforms.
  • To evaluate the potential of these nanovesicles as a cancer immunotherapy platform.

Main Methods:

  • Nanovesicles were engineered from dendritic cell membranes using nitrogen cavitation.
  • The ability of these nanovesicles to activate antigen-specific T cells was assessed.
  • Production yields were compared to alternative methods.

Main Results:

  • Dendritic cell-derived nanovesicles were successfully produced via nitrogen cavitation.
  • These nanovesicles demonstrated the capacity to activate antigen-specific T cells through direct and indirect pathways.
  • Large-scale production was achieved, addressing previous manufacturing limitations.

Conclusions:

  • Dendritic cell-derived nanovesicles generated by nitrogen cavitation are a promising immunotherapy platform.
  • This method overcomes production limitations of existing vesicle and nanoparticle-based immunotherapies.
  • These nanovesicles can stimulate and direct T cell responses for therapeutic applications.