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Related Concept Videos

Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Tissue Transplantation01:24

Tissue Transplantation

Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...

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Related Experiment Video

Updated: May 22, 2026

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients
18:48

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients

Published on: August 12, 2017

Heterogeneity within T Cell Memory: Implications for Transplant Tolerance.

Scott M Krummey1, Mandy L Ford

  • 1Department of Surgery, Emory Transplant Center, Emory University Atlanta, GA, USA.

Frontiers in Immunology
|May 9, 2012
PubMed
Summary

Memory T cells are crucial for immunity but hinder transplant tolerance. Overcoming this barrier requires understanding memory T cell behavior and developing new strategies to improve transplant success.

Keywords:
costimulationheterologous immunitymemory T cellstransplantation tolerance

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Related Experiment Videos

Last Updated: May 22, 2026

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients
18:48

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients

Published on: August 12, 2017

Measurement of T Cell Alloreactivity Using Imaging Flow Cytometry
09:04

Measurement of T Cell Alloreactivity Using Imaging Flow Cytometry

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Isolation and Transplantation of Different Aged Murine Thymic Grafts.
05:47

Isolation and Transplantation of Different Aged Murine Thymic Grafts.

Published on: May 13, 2015

Area of Science:

  • Immunology
  • Transplantation Biology

Background:

  • Adaptive immunity generates memory T cells, essential for protective immunity during immunosuppression in transplant recipients.
  • These memory T cells pose a significant challenge to achieving successful transplantation tolerance.

Purpose of the Study:

  • To review evidence on memory T cell resistance to tolerance induction strategies.
  • To explore the generation of alloreactive memory T cells in naive individuals.

Main Methods:

  • Review of experimental evidence on memory T cell resistance.
  • Analysis of mechanisms underlying alloreactive memory T cell generation.

Main Results:

  • Memory T cells exhibit increased resistance to various tolerance induction methods.
  • Alloreactive memory T cells arise in individuals without prior transplantation.

Conclusions:

  • Understanding memory T cell characteristics can guide donor selection and risk stratification for transplant rejection.
  • Further research into molecular pathways is needed to overcome the memory T cell barrier without compromising protective immunity.