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Related Concept Videos

Epigenetic Regulation01:37

Epigenetic Regulation

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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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Stress and Mental Health01:30

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Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
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Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
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Updated: Oct 29, 2025

Using a Murine Model of Psychosocial Stress in Pregnancy as a Translationally Relevant Paradigm for Psychiatric Disorders in Mothers and Infants
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Perinatal stress and epigenetics.

Moshe Szyf1

  • 1Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.

Handbook of Clinical Neurology
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Summary
This summary is machine-generated.

Early life stress can alter DNA methylation, impacting lifelong health and behavior. These epigenetic changes, particularly in the hypothalamus, are reversible, offering potential therapeutic targets for stress-related disorders.

Keywords:
DNA methylationEarly life stressEpigeneticsGlucocorticoid receptorHPA axisHippocampusHypothalamusMaternal careSocioeconomic statusStress response

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Area of Science:

  • Neuroscience
  • Epigenetics
  • Developmental Biology

Background:

  • Early life stress (ELS) in humans and animals is linked to long-term health issues, including behavioral, mental, metabolic, immune, and cardiovascular problems.
  • The hypothalamus is central to regulating stress responses, and epigenetic reprogramming in the brain, particularly the hippocampus and hypothalamus, is crucial for adapting to early life experiences.

Purpose of the Study:

  • To investigate the role of DNA methylation in mediating the effects of early life stress on lifelong behavioral and physical phenotypes.
  • To explore the potential for epigenetic modifications, specifically DNA methylation, as targets for reversing or preventing stress-induced health disorders.

Main Methods:

  • The study focuses on DNA methylation as the primary epigenetic mark, examining its role in cell-type identity and phenotypic outcomes.
  • It discusses data testing the hypothesis that modulations in the hypothalamic-pituitary-adrenal (HPA) axis via DNA methylation mediate ELS impacts.

Main Results:

  • DNA methylation profiles are dynamically established during development and reorganized throughout life, influencing neuronal phenotypes and sex differences.
  • ELS is proposed to impact lifelong phenotypes through alterations in DNA methylation and other epigenetic marks.
  • Epigenetic marks, unlike genetic mutations, are reversible, suggesting potential for therapeutic interventions.

Conclusions:

  • DNA methylation plays a critical role in maintaining cell identity and potentially in programming gene expression based on life experiences.
  • Epigenetic reprogramming, particularly DNA methylation changes in the HPA axis, is a key mechanism through which early life stress exerts long-lasting effects.
  • The reversibility of epigenetic marks offers a promising avenue for developing strategies to prevent or treat diseases associated with ELS.