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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...
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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,...
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Measuring Local Anaphylaxis in Mice
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Anaphylaxis.

A L Sheffer1

  • 1Department of Medicine, Harvard Medical School, Boston, MA 02215.

The Journal of Allergy and Clinical Immunology
|May 1, 1988
PubMed
Summary
This summary is machine-generated.

Anaphylaxis, a severe allergic reaction, involves skin, respiratory, and cardiovascular changes. Exercise-induced anaphylaxis shows mast cell alterations, requiring prompt treatment and pre-exercise avoidance of certain substances.

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Area of Science:

  • Allergy and Immunology
  • Pathology
  • Exercise Physiology

Background:

  • Anaphylaxis is a critical allergic reaction with multi-systemic involvement.
  • Key affected systems include skin, respiratory tract, and cardiovascular system.
  • Exercise-induced anaphylaxis presents unique clinical and pathological features.

Purpose of the Study:

  • To describe the clinicopathologic alterations in anaphylaxis.
  • To investigate ultrastructural changes in mast cells during exercise-induced anaphylaxis.
  • To provide therapeutic recommendations for patients at risk.

Main Methods:

  • Clinicopathologic description of anaphylaxis.
  • Ultrastructural analysis of skin biopsy specimens from patients with exercise-induced anaphylaxis.
  • Comparison of mast cell changes before and after exercise.

Main Results:

  • Anaphylaxis manifests in skin (urticaria), upper airway (edema), lower airway (bronchospasm), and cardiovascular system (hypotension).
  • Exercise-induced anaphylaxis shows mast cell degranulation, including granule enlargement and membrane fusion.
  • These ultrastructural changes resemble those seen after immunologic challenge of pulmonary mast cells.

Conclusions:

  • Prompt recognition and early therapy are crucial for managing anaphylaxis.
  • Patients with exercise-induced anaphylaxis should avoid specific triggers before exercise.
  • Pre-exercise avoidance of foods, drinks, and medications like aspirin for 4-6 hours is recommended.