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Related Concept Videos

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.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
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Allergic Drug Reactions01:27

Allergic Drug Reactions

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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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Allergic Reactions02:06

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HLA-DRB1 is associated with cefaclor-induced immediate hypersensitivity.

So-Young Park1,2,3, So Young Park1, Sujin Seo4

  • 1Department of Allergy and Clinical Immunology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.

The World Allergy Organization Journal
|April 19, 2024
PubMed
Summary

Genetic factors like LIMD1 and specific HLA-DRB1 alleles are linked to cefaclor-induced hypersensitivity reactions. These findings may help predict patient susceptibility to this severe drug allergy.

Keywords:
CefaclorCephalosporinDrug hypersensitivityImmediate hypersensitivityWhole exome sequencing

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Area of Science:

  • Pharmacogenomics
  • Immunogenetics
  • Drug Hypersensitivity

Background:

  • Drug-induced hypersensitivity, including anaphylaxis, is a significant cause of drug-related illness and death.
  • Cefaclor is a common trigger for type I hypersensitivity in Korea, but predictive genetic biomarkers are poorly understood.
  • This study investigated potential genetic factors influencing cefaclor-induced type I hypersensitivity.

Purpose of the Study:

  • To identify genetic biomarkers associated with cefaclor-induced type I hypersensitivity.
  • To explore the role of specific genes and HLA types in cefaclor hypersensitivity reactions.

Main Methods:

  • Whole exome sequencing (WES) and HLA genotyping were conducted on 43 patients experiencing cefaclor-induced type I hypersensitivity.
  • Homology modeling was employed to analyze cefaclor binding to HLA sites.

Main Results:

  • Anaphylaxis was the predominant clinical presentation (90.69%) of cefaclor hypersensitivity.
  • Genome-wide significant associations were found for rs62242177 and rs62242178 in the LIMD1 region.
  • Significant associations were observed between cefaclor hypersensitivity and HLA-DRB1∗04:03 (OR 4.61) and HLA-DRB1∗14:54 (OR 3.86).

Conclusions:

  • The LIMD1 gene and HLA-DRB1∗04:03 and HLA-DRB1∗14:54 alleles may influence susceptibility to cefaclor-induced type I hypersensitivity.
  • Larger studies are needed to confirm the roles of HLA-DRB1 and LIMD1 in the development of cefaclor hypersensitivity.