Video Experimental Relacionado
Updated: Jul 5, 2025
04:16
Individualized Reconstitution of Human Milk Microbiota: A Feasible Approach in Real-World Settings
Published on: February 7, 2025
451
El complemento en la leche materna modifica la microbiota intestinal de la descendencia para promover la salud del
Dongqing Xu1, Siyu Zhou2, Yue Liu1
1Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
Cell
|January 19, 2024
Resumen
El sistema de complemento de la leche materna protege a los bebés de los patógenos al dar forma a las bacterias intestinales. Esta protección inmune es crucial para la salud y el desarrollo del bebé, lo que pone de relieve la importancia de la lactancia materna.
Área de la Ciencia:
- Inmunología
- Microbiología
- Salud neonatal
Sus antecedentes:
- La leche materna proporciona nutrición y protección inmunológica a los bebés.
- La leche materna contiene componentes del complemento, pero su función fisiológica no está clara.
- La microbiota intestinal juega un papel crítico en la salud del bebé.
Objetivo del estudio:
- Definir la relevancia fisiológica del complemento en la leche materna.
- Investigar los mecanismos de protección del suplemento de leche materna contra los patógenos.
- Para entender cómo el complemento de la leche materna da forma a la microbiota intestinal del bebé.
Principales métodos:
- Utilizando un modelo de ratón de la infección con Citrobacter rodentium (CR).
- Comparación de los resultados en crías criadas por madres con deficiencia de complemento frente a madres de tipo salvaje.
- Análisis de los efectos directos del suplemento de leche materna en las bacterias comensales intestinales in vitro.
Principales resultados:
- Los cachorros que recibieron leche con deficiencia de complemento sucumbieron a la infección por CR, mientras que los que recibieron leche normal sobrevivieron.
- Los componentes del complemento de la leche materna fueron directamente lisados por bacterias comensales intestinales específicas a través de una vía dependiente de C1 e independiente de anticuerpos.
- La lisis mediada por el complemento condujo a la deposición del complejo de ataque de membrana y la muerte bacteriana.
Conclusiones:
- El complemento en la leche materna es esencial para proteger a los recién nacidos y los bebés contra los patógenos intestinales.
- El complemento de la leche materna da forma a la composición de la microbiota intestinal, promoviendo una comunidad microbiana protectora.
- Este mecanismo mejora la inmunidad infantil y la resistencia a los desafíos ambientales.
Videos de Conceptos Relacionados
01:23Anatomy of the Intestines
72.0K
Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
72.0K
01:18Surface Membrane Barriers
1.1K
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...
1.1K
01:22Development of Immunocompetence
309
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
309
01:29Bacterial Flora of the Large Intestine
456
The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
456
01:26Defense Mechanism Against Infection
6.5K
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...
6.5K