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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein...
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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
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Unraveling the Link Between Ectodermal Disorders and Primary Immunodeficiencies.

Roberta D'Assante1, Anna Fusco1, Loredana Palamaro1

  • 1a Department of Translational Medical Sciences , Federico II University , Naples , Italy.

International Reviews of Immunology
|March 17, 2015
PubMed
Summary

Skin and immune system disorders are linked, with ectodermal abnormalities signaling potential primary immunodeficiencies (PIDs). The skin may function as a primary lymphoid organ, supporting immune cell development.

Keywords:
FOXN1T-cell developmentectodermal dysplasiahyper-IgEprimary immunodeficiencies

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Area of Science:

  • Immunology
  • Genetics
  • Dermatology

Background:

  • Primary immunodeficiencies (PIDs) are diverse genetic disorders affecting immune system function.
  • Abnormalities in skin and skin appendages can indicate underlying immunodeficiencies due to shared ectodermal origins with the thymus.
  • This review focuses on immune disorders linked to ectodermal alterations.

Purpose of the Study:

  • To review common immune disorders associated with ectodermal alterations.
  • To highlight the connection between skin development and immune system function.
  • To explore the potential role of skin as a primary lymphoid organ.

Main Methods:

  • Literature review of primary immunodeficiencies and ectodermal disorders.
  • Analysis of genetic mutations (NEMO, EDA-1, FOXN1) associated with these conditions.
  • Summary of recent findings on skin-derived cells supporting immune cell differentiation.

Main Results:

  • Hyper-IgE syndrome presents with eczema and infections, linked to elevated IgE levels.
  • Hypohidrotic Ectodermal Dysplasia (HED) and X-linked HED (XLHED) involve skin issues and varying infection susceptibility.
  • FOXN1 gene mutations cause athymia and associated ectodermal abnormalities like alopecia.
  • Skin cells can support hematopoietic stem cell survival and T-cell differentiation.

Conclusions:

  • Ectodermal abnormalities are significant indicators of primary immunodeficiencies.
  • The skin's role in immune development, potentially as a primary lymphoid organ, is increasingly recognized.
  • Further research into skin-based immune cell development could offer new therapeutic avenues for PIDs.