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Related Concept Videos

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,...
Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
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...
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...

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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
12:08

Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence

Published on: May 22, 2013

Telomere and adaptive immunity.

Nan-ping Weng1

  • 1Laboratory of Immunology, National Institute on Aging, National Institutes of Health, 5600 Nathan Shock Drive, Baltimore, MD 21224, United States. Wengn@mail.nih.gov

Mechanisms of Ageing and Development
|January 18, 2008
PubMed
Summary
This summary is machine-generated.

Lymphocytes can divide many times due to telomeres and telomerase, which protect cell division limits. This review explores their role in lymphocyte aging and function.

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Adaptive immune responses require lymphocyte proliferation.
  • The mechanism for extensive lymphocyte cell division remains unclear.
  • Telomeres and telomerase are key regulators of cellular lifespan.

Purpose of the Study:

  • To review the role of telomeres and telomerase in lymphocyte biology.
  • To understand how these elements influence lymphocyte differentiation, function, and aging.

Main Methods:

  • Literature review of recent research on telomeres and telomerase in lymphocytes.
  • Analysis of studies investigating lymphocyte replicative lifespan.
  • Synthesis of findings on telomere maintenance in immune cells.

Main Results:

  • Telomeres and telomerase are crucial for maintaining lymphocyte replicative potential.
  • Dysregulation of telomere length is linked to immune aging.
  • Telomere dynamics impact lymphocyte differentiation and function.

Conclusions:

  • Telomere maintenance is essential for adaptive immunity.
  • Telomere attrition contributes to immunosenescence.
  • Targeting telomeres/telomerase may offer therapeutic strategies for age-related immune decline.