Video Experimental Relacionado
Updated: May 21, 2026
11:28
Isolating Lymphocytes from the Mouse Small Intestinal Immune System
Published on: February 28, 2018
Las células linfoides innatas promueven la contención anatómica de las bacterias comensales residentes en linfoides
Gregory F Sonnenberg1, Laurel A Monticelli, Theresa Alenghat
1Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Science (New York, N.Y.)
|June 8, 2012
Resumen
Las células linfoides innatas (CLI) que contienen bacterias en el intestino previenen la inflamación sistémica. Este descubrimiento destaca las ILCs.
Área de la Ciencia:
- Inmunología Inmunología.
- Microbiología Microbiología.
- Gastroenterología y Gastroenterología.
Sus antecedentes:
- El intestino de los mamíferos alberga billones de bacterias comensales, típicamente confinadas a nichos anatómicos específicos.
- Los mecanismos que rigen la contención anatómica de la microbiota intestinal siguen siendo en gran medida desconocidos.
- Las células linfoides innatas (CLI) productoras de interleucina-22 (IL-22) se han identificado en los tejidos intestinales.
Objetivo del estudio:
- Investigar el papel de las células linfoides innatas (CLI) en el mantenimiento de la contención anatómica de las bacterias comensales.
- Para aclarar los mecanismos por los cuales las ILCs previenen la diseminación bacteriana y la inflamación sistémica.
Principales métodos:
- El agotamiento de los ILC en modelos de mamíferos.
- Administración de IL-22 para evaluar sus efectos protectores.
- Identificación de las especies bacterianas diseminantes utilizando técnicas moleculares.
- Análisis de las respuestas inmunes sistémicas en relación con especies bacterianas específicas.
Principales resultados:
- El agotamiento de ILC condujo a la diseminación periférica de bacterias comensales, específicamente especies de Alcaligenes, desde tejidos linfoides.
- La diseminación bacteriana dio lugar a una inflamación sistémica, que fue mejorada por la administración de IL-22.
- Las especies alcalinas fueron suficientes para inducir inflamación sistémica tras el agotamiento de ILC.
- Respuestas inmunes específicas de los alcalígenos correlacionadas con la enfermedad de Crohn y la infección por el virus de la hepatitis C en pacientes.
Conclusiones:
- Las células linfoides innatas (CLI) juegan un papel crucial en la contención selectiva de las bacterias residentes en linfoides.
- La contención mediada por ILC previene la translocación bacteriana y la posterior inflamación sistémica.
- La desregulación de este mecanismo puede contribuir a las enfermedades inflamatorias crónicas.
Videos de Conceptos Relacionados
01:18Lymphoid Cells and Tissues
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...
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...
01:15Secondary Lymphoid Organs
Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
01:23Introduction to Lymphatic and Immune System
Immunity is a crucial biological concept about our body's inherent capacity to prevent infections and diseases. A complex network of cells and tissues collectively known as the immune system facilitates this natural defense mechanism. The immune system plays an integral role in maintaining our health and well-being, shielding us from potential health threats.
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are born...
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are born...
01:28Functions of the Lymphatic and Immune System
The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
01:26Defense Mechanism Against Infection
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...
01:31Defense Against Bacterial Pathogens
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...