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Related Concept Videos

The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview

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Related Experiment Video

Updated: Jun 22, 2026

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood
07:58

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Published on: April 16, 2012

Effects of aging on T cell function.

Laura Haynes1, Alexander C Maue

  • 1Trudeau Institute, Saranac Lake, NY 12983, USA. lhaynes@trudeauinstitute.org

Current Opinion in Immunology
|June 9, 2009
PubMed
Summary
This summary is machine-generated.

Aging significantly alters T cell function, impacting immune responses. Enhanced regulatory T cells and Th17 generation in older individuals contribute to these changes, affecting immunity to infections, vaccines, and tumors.

Related Experiment Videos

Last Updated: Jun 22, 2026

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood
07:58

Quantitative Imaging of Lineage-specific Toll-like Receptor-mediated Signaling in Monocytes and Dendritic Cells from Small Samples of Human Blood

Published on: April 16, 2012

Area of Science:

  • Immunology
  • Gerontology

Background:

  • Immunosenescence, the aging of the immune system, profoundly affects T cell function in older individuals.
  • Understanding age-related changes in specific T cell subsets is crucial for addressing immune decline.

Purpose of the Study:

  • To review current knowledge on how aging impacts T cell function.
  • To explore the consequences of these changes on immune responses to infections, vaccinations, and tumors.

Main Methods:

  • Review of recent advances in murine models of aging.
  • Analysis of new insights into T cell biology and function.

Main Results:

  • Aging leads to significant alterations in T cell responses.
  • Age-related enhancement of Th17 generation and regulatory T cell function are key findings.
  • These changes can significantly modify immune system effectiveness.

Conclusions:

  • Aging impacts various immune components, particularly T cells.
  • Understanding these T cell alterations is vital for improving immune health in the elderly.
  • This knowledge can inform strategies against age-related immune dysfunction.