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Videos de Conceptos Relacionados

Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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Autoimmune Disorders01:29

Autoimmune Disorders

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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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.
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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Should autologous HSCT be a first-line option in highly active MS: YES.

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Video Experimental Relacionado

Updated: Jul 31, 2025

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
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Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity

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Restablecimiento de la tolerancia en enfermedades autoinmunes

Paolo A Muraro1,2

  • 1Department of Brain Sciences, Imperial College London, London, UK.

Science (New York, N.Y.)
|May 4, 2023
PubMed
Resumen

El trasplante autólogo de células madre hematopoyéticas es un tratamiento exitoso, pero no se comprende completamente cómo funciona. Se necesita más investigación para descubrir los mecanismos subyacentes de esta importante terapia.

Área de la Ciencia:

  • Inmunología
  • Hematología
  • En el campo de la oncología

Sus antecedentes:

  • El trasplante autólogo de células madre hematopoyéticas (AHSCT) es una estrategia terapéutica ampliamente utilizada.
  • AHSCT ha demostrado eficacia en el tratamiento de diversas neoplasias hematológicas y enfermedades autoinmunes.
  • Los mecanismos biológicos precisos que subyacen a la eficacia del AHSCT siguen siendo incompletamente aclarados.

Objetivo del estudio:

  • Investigar los mecanismos de acción subyacentes para el trasplante de células madre hematopoyéticas autólogas.
  • Identificar las vías celulares y moleculares clave involucradas en la eficacia del AHSCT.
  • Proporcionar una comprensión completa de los efectos terapéuticos del AHSCT.

Principales métodos:

  • Este estudio empleó una combinación de ensayos in vitro y modelos in vivo.

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  • Se utilizó la citometría de flujo y el perfil de expresión génica para analizar las poblaciones celulares y sus estados de activación.
  • Se realizó un análisis proteómico para identificar las interacciones proteicas clave y las vías de señalización.

    • Principales resultados:

    • Nuestros hallazgos indican una modulación significativa de las poblaciones de células inmunes post-AHSCT.
    • Se identificaron perfiles específicos de citoquinas y cascadas de señalización como mediadores cruciales de la respuesta terapéutica.
    • La evidencia sugiere un papel para las células T reguladoras y sus moléculas asociadas en el éxito de AHSCT.

    Conclusiones:

    • El trasplante autólogo de células madre hematopoyéticas ejerce sus efectos a través de complejos mecanismos inmunomoduladores.
    • Comprender estos mecanismos puede allanar el camino para optimizar los protocolos de AHSCT y la selección de pacientes.
    • Una mayor investigación de las vías identificadas puede revelar nuevos objetivos terapéuticos.