Video Experimental Relacionado
Updated: Aug 18, 2026
08:52
Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant
Published on: May 27, 2011
La memoria de células T CD8+ específicas del virus determinada por el tamaño del estallido clonal
1Department of Immunology, St Jude Children's Research Hospital, Memphis, Tennessee 38105.
Nature
|June 23, 1994
Resumen
La memoria de células T CD8+ específicas del virus persiste a largo plazo sin exposición continua al antígeno viral. Este estudio muestra que las células T de memoria se mantienen independientemente de las fuentes persistentes de péptidos virales.
Área de la Ciencia:
- Inmunología Inmunología.
- Virología Virología.
- La investigación de la memoria de las células T en la investigación de la memoria de las células T.
Sus antecedentes:
- Algunos virus establecen infecciones de por vida, mientras que otros, como la influenza A, requieren un aumento periódico de la inmunidad de las células T CD8 +.
- Se observa una memoria prolongada de las células T CD8 + para los virus que no suelen volver a encontrarse o persistir en el genoma del huésped.
- Esto sugiere que la memoria de las células T CD8+ puede no depender de la exposición continua o intermitente al antígeno.
Objetivo del estudio:
- Investigar los mecanismos que mantienen la memoria a largo plazo de las células T CD8+.
- Para determinar si el antígeno viral persistente es esencial para mantener la memoria de células T CD8 + específicas del virus.
- Para evaluar la longevidad de la memoria de las células T CD8 + en ausencia de fuentes de péptidos virales detectables.
Principales métodos:
- Transferencia adoptiva de células T de memoria CD8 + específicas del virus a ratones receptores ingenuos y previamente infectados.
- Pruebas de restimulación con antígenos virales para evaluar la expansión clonal y la detección de células de memoria.
- Análisis del mantenimiento de las células T en ratones irradiados y con deficiencia de beta 2-microglobulina.
- Detección de anticuerpos virales y péptidos en ratones receptores para evaluar la persistencia del antígeno.
Principales resultados:
- La restimulación con el antígeno del virus de Sendai aumentó significativamente la memoria de los precursores citotóxicos de los linfocitos T (CTLp) en ratones quiméricos.
- Las CTLp específicas del virus de Sendai se mantuvieron durante más de 250 días en receptores irradiados y no infectados.
- Las células T de memoria CD8+ específicas del virus se mantuvieron durante más de 100 días en receptores ingenuos que carecían de anticuerpos virales detectables o depósitos de proteínas.
Conclusiones:
- La memoria de las células T CD8 + se puede mantener durante períodos prolongados independientemente de la exposición continua al antígeno viral.
- El estudio no encontró evidencia de depósitos persistentes de proteínas virales que mantengan las poblaciones de células T de memoria.
- Estos hallazgos desafían la necesidad de un antígeno persistente para la memoria a largo plazo de células T CD8 + específicas del virus.
Videos de Conceptos Relacionados
01:20Special Features of Adaptive Immunity
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,...
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,...
01:23Cells of the Adaptive Immune Response
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...
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...
01:27Cytotoxic 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...
01:23Immunological Memory
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 is...
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 is...
01:29Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...