Video Experimental Relacionado
Updated: Mar 30, 2026

14:54
An In Vivo Method for Evaluating the Gut-Blood Barrier and Liver Metabolism of Microbiota Products
Published on: October 20, 2018
9.0K
Una barrera intestinal-vascular controla la diseminación sistémica de las bacterias
Ilaria Spadoni1, Elena Zagato1, Alice Bertocchi1
1Department of Experimental Oncology, European Institute of Oncology, Milan, Italy.
Resumen
Los investigadores descubrieron una barrera intestinal vascular que impide que los microbios intestinales entren en el torrente sanguíneo. Esta barrera
Área de la Ciencia:
- Gastroenterología
- Inmunología
- Microbiología
Sus antecedentes:
- La microbiota intestinal está normalmente confinada a la luz intestinal.
- Las bacterias patógenas pueden trasladarse a sitios sistémicos, desencadenando respuestas inmunes.
- Los mecanismos que mantienen la compartimentación intestinal no se comprenden completamente.
Objetivo del estudio:
- Para identificar la barrera que controla la translocación microbiana desde el intestino.
- Para aclarar los mecanismos de penetración de la barrera por los patógenos.
- Investigar el papel de la barrera en el daño hepático asociado con la enfermedad celíaca.
Principales métodos:
- Identificación de la barrera intestino-vascular (BVV) en ratones y en humanos.
- Análisis de los mecanismos de invasión de Salmonella typhimurium.
- Evaluación de la integridad de GVB en pacientes con enfermedad celíaca.
Principales resultados:
- Se identificó una nueva barrera intestinal-vascular (GVB, por sus siglas en inglés), que regula la entrada de antígenos y microbios en la circulación.
- Salmonella typhimurium utiliza su sistema de secreción de tipo III y la reducción de la señalización de la beta-catenina para violar el GVB.
- Las alteraciones de GVB se correlacionan con el aumento de las transaminasas en pacientes con enfermedad celíaca, lo que sugiere un papel en el daño hepático.
Conclusiones:
- La barrera intestino-vascular (GVB) es crucial para mantener la compartimentación intestinal.
- Los factores de virulencia del patógeno y las vías de señalización de la célula huésped influyen en la integridad de GVB.
- La disfunción GVB puede contribuir a la patología hepática en condiciones como la enfermedad celíaca, ofreciendo nuevos objetivos terapéuticos para el eje intestino-hígado.
Más Videos Relacionados
Videos de Conceptos Relacionados
Defense Mechanism Against Infection
11.0K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
11.0K
Physiology of Enteric Nervous System and Gut Health
1.3K
The gastrointestinal tract, responsible for the digestion and absorption of nutrients, is safeguarded by the intestinal barrier, which consists of secretory, physical, and immune components. At the forefront is the secretory barrier, composed of essential elements such as mucus, gut microbiota, and defense proteins. They collaborate to break down food particles, facilitate nutrient absorption, and maintain optimal gut health. These secretory components ensure the smooth functioning of the...
1.3K
Surface Membrane Barriers
3.3K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
3.3K
Regulation of Bacterial Virulence
36
Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
36
Defense Against Bacterial Pathogens
3.5K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
3.5K
The Blood-brain Barrier
55.4K
Overview
55.4K

