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Related Concept Videos

Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation01:37

Epigenetic Regulation

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...
Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

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.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Inflammatory Response01:28

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Combinatorial Gene Control02:33

Combinatorial Gene Control

Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...

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Related Experiment Video

Updated: Jun 1, 2026

Retroviral Transduction of Helper T Cells as a Genetic Approach to Study Mechanisms Controlling their Differentiation and Function
11:50

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Epigenetic control in immune function.

Peter J van den Elsen1, Marja C J A van Eggermond, Rutger J Wierda

  • 1Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, The Netherlands. pjvdelsen@lumc.nl

Advances in Experimental Medicine and Biology
|June 2, 2011
PubMed
Summary
This summary is machine-generated.

Epigenetic mechanisms precisely control immune functions by regulating Major Histocompatibility Complex (MHC) Class I and Class II genes. The Class II transactivator (CIITA) is key to this transcriptional regulation for effective adaptive immunity.

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Area of Science:

  • Immunology
  • Epigenetics
  • Molecular Biology

Background:

  • Major Histocompatibility Complex (MHC) Class I and Class II molecules are crucial for adaptive immune responses.
  • MHC molecules present peptides to CD8+ and CD4+ T cells, respectively.
  • Antigen-presenting cells (APCs), especially dendritic cells, present pathogen peptides via MHC-II to CD4+ T cells, initiating adaptive immunity.

Purpose of the Study:

  • To explore recent advances in understanding how epigenetic events regulate immune functions.
  • To emphasize the transcriptional regulation of Major Histocompatibility Complex Class I (MHC-I) and Class II (MHC-II) genes.
  • To discuss the role of transcription factors and epigenetic mechanisms in controlling MHC-I, MHC-II, and MHC2TA gene expression.

Main Methods:

  • Focus on transcriptional regulation of MHC-I, MHC-II, and MHC2TA genes.
  • Analysis of transcription factors interacting with conserved cis-acting promoter elements.
  • Investigation of epigenetic mechanisms modulating cell type-specific gene regulation.

Main Results:

  • Epigenetic events are central to controlling immune functions.
  • The Class II transactivator (CIITA) is essential for MHC-II gene activation and plays an ancillary role in MHC-I gene regulation.
  • Transcription factors and epigenetic mechanisms dictate cell type-specific expression of MHC genes.

Conclusions:

  • Epigenetic regulation is vital for precise control of immune functions.
  • CIITA is a master regulator for MHC-II transcription and influences MHC-I transcription.
  • Understanding these regulatory mechanisms is key to T helper cell differentiation and effective immune responses.