Video Experimental Relacionado
Updated: Aug 18, 2026

10:31
Antigenic Liposomes for Generation of Disease-specific Antibodies
Published on: October 25, 2018
Agammaglobulinemia infantil y hipersensibilidad inmediata a la penicilina G
JAMA
|April 25, 1977
Resumen
La agammaglobulinemia infantil ligada a X (XLA) puede presentarse con niveles normales de inmunoglobulina E (IgE), lo que lleva a reacciones atópicas y alérgicas. La terapia profiláctica con ampicilina redujo las infecciones en un paciente con XLA y IgE normal.
Área de la Ciencia:
- Inmunología Inmunología.
- Alergia pediátrica a las alergias en niños.
- Genética La genética.
Sus antecedentes:
- La agammaglobulinemia infantil ligada a X (XLA) es una inmunodeficiencia primaria caracterizada por una severa reducción de las células B y la mayoría de los isotipos de inmunoglobulina (Ig).
- La síntesis de inmunoglobulina E (IgE) conservada es atípica en XLA, ya que los niveles de IgE son típicamente bajos o indetectables.
- La atopia y la anafilaxia son preocupaciones clínicas significativas, particularmente cuando se considera la terapia con antibióticos.
Videos de Conceptos Relacionados
Humoral Immune Responses
Overview
Allergic Drug Reactions
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...
Development of Immunocompetence
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
Hypersensitivities
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...
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...
Hypersensitivity Reactions: Cytolytic Reactions
Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
Hypersensitivity Reactions: Immune-Complex Reactions
Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...

