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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
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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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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Video Experimental Relacionado

Updated: Sep 8, 2025

Co-Culture of Murine Small Intestine Epithelial Organoids with Innate Lymphoid Cells
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Co-Culture of Murine Small Intestine Epithelial Organoids with Innate Lymphoid Cells

Published on: March 23, 2022

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Las células linfoides innatas de tipo 2 inducidas por IL-25 refuerzan la inmunidad de la mucosa

Victor S Cortez1, Sara Viragova2, Satoshi Koga1

  • 1Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA.

Cell
|September 6, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los helmintos intestinales inducen una adaptación intestinal protectora usando IL-25, mejorando la inmunidad del huésped. Esta adaptación involucra células inmunes especializadas, que ofrecen resistencia contra los patógenos sin causar inflamación crónica.

Palabras clave:
La IL-25Las ILC2Las alarminasLa epigenéticacélulas madre epitelialesInfección por el helmintomemoria innatael intestino delgadoAdaptación de los tejidos

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Área de la Ciencia:

  • Inmunología
  • Parasitología
  • Gastroenterología

Sus antecedentes:

  • Los helmintos intestinales han desarrollado mecanismos para modular las respuestas del huésped para la supervivencia y la reproducción.
  • La vía de la interleucina-25 (IL-25), que involucra a las células del mechón y las células linfoides innatas de tipo 2 (ILC2s), juega un papel en la defensa del huésped contra los parásitos.
  • Los parásitos pueden manipular este circuito mediado por IL-25 para su beneficio.

Objetivo del estudio:

  • Investigar la inducción y las características de la adaptación del intestino delgado utilizando IL-25.
  • Determinar el impacto de esta adaptación en la resistencia del huésped a los patógenos.
  • Para aclarar el papel de ILC2s en el mantenimiento de la resiliencia de la mucosa.

Principales métodos:

  • Inducción de la adaptación intestinal a través de la administración de IL-25 en un modelo de vertebrados.
  • Evaluación de los cambios anatómicos e inmunológicos después de la inducción.
  • Caracterización de los ILC2 de memoria efectiva a través del análisis transcripcional y epigenético.
  • Evaluación de la resistencia del huésped a los patógenos de barrera.

Principales resultados:

  • La IL-25 sola indujo cambios anatómicos e inmunológicos persistentes en el intestino delgado.
  • La adaptación confirió una mayor resistencia a varios patógenos de barrera, incluso en los pulmones.
  • Las ILC2 de memoria efectoras fueron modificadas transcripcionalmente y epigenéticamente, distintas del entrenamiento innato.
  • Estos ILC2 modificados mantuvieron un estado activado, apoyando la resiliencia de la mucosa sin inflamación crónica.

Conclusiones:

  • La IL-25 puede inducir un estado duradero de adaptación intestinal con amplios beneficios protectores.
  • Los ILC2 modificados de memoria efectiva son mediadores clave de esta resiliencia, coordinando una defensa de la mucosa distribuida.
  • Esta vía ofrece una nueva estrategia para mejorar la inmunidad del huésped y prevenir el daño inducido por el patógeno.