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Related Concept Videos

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Master Transcription Regulators

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Related Experiment Video

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Class II Major Histocompatibility Complex Transactivator (CIITA): A Master MHC-II Regulator Impacting Cancer and

Soon Khai Low1, Yu Fujiwara2, Daisuke Nishizaki3,4

  • 1Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee, WI, USA.

Journal of Immunotherapy and Precision Oncology
|April 17, 2026
PubMed
Summary
This summary is machine-generated.

Class II Major Histocompatibility Complex Transactivator (CIITA) is a master regulator of immune responses. Its dysregulation is linked to immune disorders and cancer, but restoring CIITA offers therapeutic potential.

Keywords:
CIITAMHC-IIimmunoregulatory

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Class II Major Histocompatibility Complex Transactivator (CIITA) is a crucial non-DNA-binding regulator of MHC-II gene expression.
  • CIITA orchestrates antigen presentation and adaptive immunity by forming the MHC-II enhanceosome.
  • CIITA expression is tightly controlled by multiple promoters and is influenced by cytokines and epigenetic mechanisms.

Purpose of the Study:

  • To review the multifaceted role of CIITA in immune regulation.
  • To explore the implications of CIITA dysregulation in various diseases.
  • To highlight CIITA's therapeutic potential in cancer immunotherapy and antiviral strategies.

Main Methods:

  • Literature review and synthesis of existing research on CIITA.
  • Analysis of CIITA's function in gene expression and immune surveillance.
  • Examination of CIITA's involvement in disease pathogenesis and therapeutic interventions.

Main Results:

  • CIITA deficiency causes bare lymphocyte syndrome, a severe immunodeficiency.
  • CIITA gene variants are associated with autoimmune diseases, graft rejection, and immune dysregulation.
  • Pathogens and cancer cells exploit CIITA suppression for immune evasion, while CIITA restoration enhances anti-tumor immunity.

Conclusions:

  • CIITA is a pivotal immune regulator with significant implications in immune-related disorders and cancer.
  • Dysregulation of CIITA contributes to immune evasion in infections and malignancies.
  • Targeting CIITA presents a promising therapeutic avenue for cancer immunotherapy, antiviral treatments, and immune modulation.