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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
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Allergic Drug Reactions01:27

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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 numerous...
Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Hypersensitivities01:30

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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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Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Types of Toxins01:36

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Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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Occupational sensitization to soy allergens in workers at a processing facility.

B J Green1, K J Cummings, W R Rittenour

  • 1Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV 26505-2888, USA.dox6@cdc.gov

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|May 7, 2011
PubMed
Summary
This summary is machine-generated.

Soy flake processing workers (SPWs) show high allergic sensitization to soy, primarily to high molecular weight storage proteins like beta-conglycinin (Gly m 5) and glycinin (Gly m 6). This suggests these proteins may be key respiratory sensitizers in occupational settings.

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Area of Science:

  • Occupational health
  • Immunology
  • Food allergy

Background:

  • Soy antigen exposure is linked to asthma in community outbreaks and workplaces.
  • Soy flake processing workers (SPWs) exhibit significantly higher allergic sensitization to soy compared to controls.
  • Allergic sensitization to soy was five times more prevalent in SPWs than in health care worker controls (HCWs).

Purpose of the Study:

  • To characterize the specific immune reactivity to soy allergens in soy flake processing workers (SPWs).
  • To identify the specific soy proteins responsible for IgE sensitization in occupationally exposed individuals.

Main Methods:

  • Sera from SPWs with positive soy ImmunoCAP results were analyzed using IgE immunoblots.
  • Wild-type (WT) and transgenic (TG) soy antigens were sequenced using nanoscale Ultra-Performance Liquid Chromatography Tandem Mass Spectrometry (nanoUPLC MS/MS).
  • IgE reactivity to specific proteins, including CP4-EPSP in TG soy, was investigated using control sera from HCWs.

Main Results:

  • IgE immunoblotting revealed sensitization to multiple soy antigens, with common reactivity to 48, 54, and 62 kDa bands.
  • NanoUPLC MS/MS identified high molecular weight soybean storage proteins, beta-conglycinin (Gly m 5) and glycinin (Gly m 6), as the primary targets of SPW IgE.
  • No specific IgE reactivity was detected against lower molecular weight allergens (Gly m 1, Gly m 2) or CP4-EPSP in transgenic soy.

Conclusions:

  • SPWs with soy-specific IgE predominantly react to higher molecular weight soybean storage proteins (Gly m 5, Gly m 6), unlike community asthma studies focusing on lower molecular weight allergens.
  • IgE reactivity to both WT and TG soy extracts was comparable, with no observed reactivity to CP4-EPSP.
  • High molecular weight soybean storage proteins, Gly m 5 and Gly m 6, are potential respiratory sensitizers in individuals with occupational exposure to soy.