Video Experimental Relacionado
Updated: Jan 8, 2026
10:09
Characterization of Immune Cell-derived Extracellular Vesicles and Studying Functional Impact on Cell Environment
Published on: June 2, 2020
7.2K
Cues volátiles y no volátiles de patógenos dan forma a la producción de vesículas extracelulares del huésped en la
Klaudia Kołodziejska1,2, Agata Szczepańska1, Satya Vadlamani1,2
1Laboratory of Animal Molecular Physiology, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
Nature communications
|December 21, 2025
Resumen
Los animales detectan productos químicos de patógenos para activar distintas vías de vesículas extracelulares (VE). Esta señalización anticipatoria, que involucra neuronas específicas y GPCR, prepara las respuestas protectoras y mejora la supervivencia de la descendencia.
Área de la Ciencia:
- Inmunología
- Neurociencia
- Biología Celular
Sus antecedentes:
- Los animales encuentran indicios de patógenos antes de la infección, lo que influye en las respuestas inmunitarias.
- Las vesículas extracelulares (VE) son cruciales para la comunicación intercelular y la regulación inmunitaria.
- El papel de los indicios anticipatorios de patógenos en la modulación de la dinámica de las VE es en gran medida desconocido.
Objetivo del estudio:
- Investigar cómo los productos químicos derivados de patógenos influyen en la producción y función de las vesículas extracelulares (VE).
- Elucidar los mecanismos sensoriales y moleculares subyacentes a las respuestas de las VE a distintos indicios químicos.
- Determinar la relevancia fisiológica de las respuestas de las VE preparadas contra patógenos.
Principales métodos:
- Se utilizó Caenorhabditis elegans como organismo modelo.
- Se investigó la producción de VE en respuesta a compuestos volátiles y no volátiles de patógenos.
- Se emplearon enfoques genéticos y neurobiológicos para mapear las vías sensoriales y los mediadores moleculares (por ejemplo, GPCR).
Principales resultados:
- Los volátiles y no volátiles de los patógenos activan vías distintas de producción de VE mediadas por neuronas.
- Los indicios no volátiles activan la liberación de VE dependiente de la inmunidad a través de GPCR (SRI-19, SRI-36/39, SRR-6), con SRR-6 regulando la comunicación de VE entre el intestino y el músculo.
- La preexposición a los volátiles de los patógenos mejora la supervivencia de la descendencia a través de un mecanismo dependiente de SRI-19, lo que indica beneficios intergeneracionales.
Conclusiones:
- Los indicios químicos derivados de patógenos dan forma a la producción de VE del huésped a través de circuitos sensoriales especializados.
- Los animales pueden anticipar la infección al detectar indicios químicos, preparando respuestas fisiológicas protectoras.
- Este estudio revela un nuevo mecanismo de preparación inmunitaria intergeneracional mediado por la detección de productos químicos y las VE.
Videos de Conceptos Relacionados
01:29Immune Response Against Viral Pathogens
1.6K
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...
1.6K
01:33Overview of Secretory Vesicles
9.3K
Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
9.3K
01:20Infection
11.6K
When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
11.6K
01:10Intracellular Movement of Viruses and Bacteria
3.4K
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
3.4K
00:56Viral Structure
73.7K
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
73.7K
01:38Intralumenal Vesicles and Multivesicular Bodies
4.6K
Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
4.6K