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Hypersensitivities01:30

Hypersensitivities

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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Antibody Structure01:10

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Related Experiment Video

Updated: Jul 16, 2025

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
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Hyper IgE Syndromes.

Serena Gracci1,2, Tommaso Novelli2, Sofia D'Elios2

  • 1Paediatric Unit, "San Giuseppe" Hospital, Empoli, Italy.

Current Pediatric Reviews
|September 13, 2023
PubMed
Summary
This summary is machine-generated.

Hyper IgE Syndromes (HIES) are rare immunodeficiencies with eczema and infections. Genetic testing is crucial for diagnosing specific HIES subtypes and guiding treatment for better outcomes.

Keywords:
DOCK8Hyper IgE syndromesIgEJob’s syndrome.STAT3primary immunodeficiency

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Area of Science:

  • Immunology
  • Genetics
  • Dermatology

Background:

  • Hyper IgE Syndromes (HIES) are primary immunodeficiencies marked by eczema, recurrent infections, and high IgE levels.
  • While historically recognized, HIES encompasses various monogenic disorders with distinct genetic underpinnings.
  • Clinical presentation includes newborn rash, eczema, skin/respiratory infections, allergies, and potential malignancies.

Purpose of the Study:

  • To highlight the genetic basis of Hyper IgE Syndromes.
  • To emphasize the diagnostic challenges and the importance of genetic identification.
  • To outline current treatment strategies and prognostic factors in HIES.

Main Methods:

  • Genetic and molecular characterization of patients with HIES.
  • Review of clinical manifestations and diagnostic criteria.
  • Analysis of treatment approaches including infection management and hematopoietic stem cell transplantation (HSCT).

Main Results:

  • Identification of mutations in genes such as STAT3, DOCK8, ZNF341, CARD11, ERBB2IP, IL6R, and IL6ST as causes of HIES.
  • Recognition of diagnostic difficulties, especially differentiating HIES from atopic dermatitis in early life.
  • HSCT can alter prognosis in specific HIES subtypes.

Conclusions:

  • Genetic diagnosis is essential for distinguishing HIES subtypes and informing prognosis.
  • Early diagnosis and prompt management of infections are critical for improving patient outcomes.
  • Treatment strategies, including HSCT, should be tailored to the specific genetic cause of HIES.