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Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Aging01:26

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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.
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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...
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Related Experiment Video

Updated: Feb 8, 2026

Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging
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Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging

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Epigenetics of T cell aging.

Jörg J Goronzy1,2, Bin Hu1,2, Chulwoo Kim1,2

  • 1Division of Immunology and Rheumatology, Department of Medicine, Stanford University, Stanford, California, USA.

Journal of Leukocyte Biology
|June 28, 2018
PubMed
Summary
This summary is machine-generated.

Epigenetic changes in T cells impact their aging and function. Age-associated modifications in chromatin structure, driven by differentiation pathways, contribute to T cell dysfunction and senescence.

Keywords:
DNA methylationT cell differentiationchromatin accessibilityhistone modificationimmunosenescencetranscription factor

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Area of Science:

  • Immunology
  • Cellular Biology
  • Epigenetics

Background:

  • T cells exhibit diverse differentiation stages crucial for immune function.
  • Epigenetic modifications, including histone and DNA alterations, are vital for maintaining T cell identity.
  • Cellular aging is often associated with changes in chromatin structure, leading to dysfunction and senescence.

Purpose of the Study:

  • To review age-related epigenetic alterations in T cells.
  • To contextualize these changes within known epigenetic marks of aging and T cell differentiation.
  • To explore the role of transcription factor networks in T cell aging.

Main Methods:

  • Review of existing literature on T cell epigenetics and aging.
  • Analysis of canonical epigenetic marks in aging models.
  • Examination of recent findings on chromatin accessibility in T cell differentiation.

Main Results:

  • Epigenetic changes, particularly in chromatin structure, are characteristic of T cell aging.
  • Age-associated modifications in T cells mirror those seen in other aging systems.
  • Transcription factor networks driving T cell differentiation are linked to many age-related chromatin changes.

Conclusions:

  • Loss of quiescence and activation of differentiation pathways are key drivers of T cell aging.
  • Epigenetic modifications play a significant role in age-related T cell dysfunction.
  • Understanding these epigenetic shifts is crucial for addressing age-related immune decline.