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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.
X-chromosome...
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Cell Specific Gene Expression01:58

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Genomic Imprinting and Inheritance02:30

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Related Experiment Video

Updated: Jan 6, 2026

Optimized Analysis of DNA Methylation and Gene Expression from Small, Anatomically-defined Areas of the Brain
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Integrative DNA methylation and transcriptome analysis reveal cell-type specific patterns in response to elevated

O Emery1,2, C Carmeli3, S Gonseth-Nusslé4

  • 1Department of Health Promotion and Prevention (DPSP), Unisanté, University Center for Primary Care and Public Health, Lausanne, Switzerland.

Epigenetics
|October 29, 2025
PubMed
Summary
This summary is machine-generated.

High allostatic load (AL), a marker of chronic stress, is linked to poor health. This study reveals cell-specific DNA methylation and gene expression changes associated with AL, potentially identifying new biomarkers and therapeutic targets for stress-related diseases.

Keywords:
Allostatic loadSKIPOGHepigeneticsmethylationstresstranscriptomics

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Area of Science:

  • Epigenetics and Systems Biology
  • Human Physiology and Health
  • Genomics and Transcriptomics

Background:

  • Allostatic load (AL) quantifies physiological dysregulation from chronic stress, linked to adverse health outcomes like cardiovascular disease and mortality.
  • DNA methylation (DNAm) is a key epigenetic mechanism influenced by genes and environment, regulating gene expression.
  • Integrating epigenetic and transcriptomic data offers insights into biological processes underlying stress-induced health disparities.

Purpose of the Study:

  • To investigate cell-type specific DNA methylation and gene expression differences between high and low allostatic load groups.
  • To identify potential epigenetic biomarkers and therapeutic targets associated with chronic stress.
  • To elucidate the biological mechanisms linking allostatic load to health outcomes through an integrated omics approach.

Main Methods:

  • Utilized bulk DNAm and transcriptome data from 429 individuals in the Swiss Kidney Project On Genes in Hypertension (SKIPOGH) cohort.
  • Employed tensor composition analysis (TCA) and CIBERSORTx to deconvolute whole blood signals into cell-type specific data for six blood cell types.
  • Performed differential analysis of DNAm and gene expression in high (N=126) vs. low (N=303) AL groups for each cell type.

Main Results:

  • Identified 263 CpG-gene pairs (250 CpGs, 138 differentially methylated genes) across all cell types.
  • Observed enrichment of immune processes among downregulated genes in CD8 T and B cells from individuals with high AL.
  • Findings suggest impaired immune response in high AL, consistent with known health impacts of chronic stress.

Conclusions:

  • Cell-specific epigenetic and transcriptomic analyses are crucial for understanding complex biological states like allostatic load.
  • The identified differentially methylated genes and pathways may serve as biomarkers for chronic stress and related health risks.
  • This research provides a foundation for developing targeted interventions for stress-related conditions.