Video Experimental Relacionado
Updated: Jul 9, 2026
13:18
Artificial Antigen Presenting Cell (aAPC) Mediated Activation and Expansion of Natural Killer T Cells
Published on: December 29, 2012
Propagación de la autoinmunidad de las células T a los determinantes crípticos de un autoantígeno
P V Lehmann1, T Forsthuber, A Miller
1Department of Microbiology and Molecular Genetics, University of California, Los Angeles 90024.
Nature
|July 9, 1992
Resumen
La encefalomielitis alérgica experimental (EAE) involucra respuestas inmunes a la proteína básica de mielina (MBP). La propagación determinante revela nuevos objetivos de MBP durante la EAE crónica, lo que afecta el desarrollo y la terapia de la enfermedad autoinmune.
Área de la Ciencia:
- Neuroinmunología La neuroinmunología.
- Enfermedades autoinmunes Las enfermedades autoinmunes.
- Inmunología de las células T.
Sus antecedentes:
- La encefalomielitis alérgica experimental (EAE) es un modelo de enfermedad autoinmune mediada por células T CD4+.
- La EAE es típicamente inducida por la inmunización con la proteína básica de mielina (MBP).
- Los modelos de EAE de roedores muestran que las respuestas de las células T a menudo son específicas de un único determinante dominante de la PBM.
Objetivo del estudio:
- Investigar la respuesta inmune a los determinantes de la proteína básica de mielina (MBP) en la encefalomielitis alérgica experimental (EAE).
- Para determinar si las respuestas inmunes se diversifican más allá del determinante dominante inicial durante la EAE.
- Explorar las implicaciones de la propagación determinante para la patogénesis y la terapia de EAE.
Principales métodos:
- Inducción de EAE en ratones (SJL x B10.PL) F1 utilizando MBP o el péptido MBP Ac1-11.1.
- Evaluación de las respuestas proliferativas de las células T a varios determinantes de la MBP en ratones con EAE aguda y crónica.
- Análisis de la reactividad de las células T después de la inducción con un único determinante dominante.
Principales resultados:
- El dominio inmune de MBP:Ac1-11 está restringido a la fase inductiva de EAE.
- En la EAE crónica, las células T responden a determinantes adicionales de la MBP (péptidos 35-47, 81-100, 121-140).
- Priming con el péptido Ac1-11 MBP solo conduce a la reactividad contra otros determinantes MBP endógenos, lo que indica la propagación determinante.
Conclusiones:
- Los determinantes de MBP que son crípticos después de la inmunización inicial pueden volverse inmunogénicos durante la EAE.
- La propagación determinante diversifica el repertorio de células T autorreactivas en EAE.
- Este fenómeno tiene implicaciones significativas para la comprensión de la patogénesis de la enfermedad autoinmune y el desarrollo de estrategias terapéuticas.
Videos de Conceptos Relacionados
01:40Cell-mediated Immune Responses
Overview
01:26Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
01:28Diversity of Antigen Receptors
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
01:22T Cell Activation and Clonal Selection
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
01:24T Cell Types and Functions
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...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:27Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...