Video Experimental Relacionado
Updated: Jun 6, 2026
08:36
Measuring Dengue Virus RNA in the Culture Supernatant of Infected Cells by Real-time Quantitative Polymerase Chain Reaction
Published on: November 1, 2018
CLEC5A es crítico para la enfermedad letal inducida por el virus del dengue
Szu-Ting Chen1, Yi-Ling Lin, Ming-Ting Huang
1Department and Institute of Microbiology and Immunology, National Yang-Ming University, Taipei 112, Taiwan.
Nature
|May 23, 2008
Resumen
CLEC5A actúa como un receptor para el virus del dengue (DV), desencadenando la liberación de citoquinas inflamatorias. El bloqueo de esta interacción reduce la fuga de plasma inducida por DV y la mortalidad en ratones, ofreciendo un tratamiento potencial para el dengue severo.
Área de la Ciencia:
- Inmunología Inmunología.
- Virología Virología.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La fiebre hemorrágica del dengue y el síndrome de shock del dengue son infecciones graves por el virus del dengue (DV).
- Estas condiciones implican fugas de plasma y bajos recuentos de plaquetas.
Objetivo del estudio:
- Para investigar el papel de CLEC5A (familia de dominio de lectina de tipo C 5, miembro A) en la infección de DV.
- Explorar CLEC5A como un objetivo terapéutico potencial para el dengue severo.
Principales métodos:
- Se ha probado directamente la interacción de CLEC5A con los viriones DV.
- Se han investigado vías de señalización aguas abajo, incluyendo la fosforilación DAP12 y la liberación de citoquinas.
- Utilizó anticuerpos monoclonales anti-CLEC5A en modelos de ratón de infección por VD.
Principales resultados:
- CLEC5A se une directamente a DV, lo que lleva a la fosforilación de DAP12 y a la liberación de citoquinas proinflamatorias.
- La interacción CLEC5A-DV no media la entrada viral, sino que estimula la producción de citoquinas.
- El bloqueo de la interacción CLEC5A-DV suprimió la liberación de citoquinas y redujo significativamente la fuga de plasma inducida por DV, la hemorragia y la mortalidad en ratones con deficiencia de STAT1.
Conclusiones:
- CLEC5A funciona como un receptor de señalización para DV, mediando respuestas proinflamatorias.
- Dirigirse a la interacción CLEC5A-DV presenta una estrategia prometedora para mitigar el daño tisular y mejorar la supervivencia en el dengue grave.
- Este enfoque también puede ser aplicable a otras enfermedades inflamatorias inducidas por virus.
Más Videos Relacionados
Videos de Conceptos Relacionados
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...
01:28Diphtheria
Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
01:25Arboviral Encephalitis
Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
01:18Yellow Fever
Yellow fever is a viral hemorrhagic disease caused by the yellow fever virus (YFV), a member of the Flaviviridae family. It is transmitted primarily by Aedes and Haemagogus mosquitoes in tropical and subtropical regions of Africa and South America. After transmission through a mosquito bite, the virus initially replicates in skin-resident immune cells such as dendritic cells and macrophages. These cells then migrate to the lymph nodes, where viral replication increases, eventually leading to...
01:26Encephalitis ll: Pathophysiology
Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
01:21Cytotoxic Edema: Pathophysiology
Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...