Video Experimental Relacionado
Updated: Jul 14, 2026
06:50
A Protocol to Infect Caenorhabditis elegans with Salmonella typhimurium
Published on: June 26, 2014
Estrategias de invasión de parásitos intracelulares estrategias de invasión de parásitos intracelulares
1Department of Molecular Microbiology, Center for Infectious Diseases, Washington University School of Medicine, St. Louis, MO 63110, USA. sibley@borcim.wustl.edu
Science (New York, N.Y.)
|April 10, 2004
Resumen
Los parásitos intracelulares, como Apicomplexa, utilizan la motilidad deslizante basada en actina para invadir activamente las células huésped. Este eficiente mecanismo de entrada celular es clave para su éxito como patógenos.
Área de la Ciencia:
- Parasitología Parasitología.
- Biología celular Biología celular.
- Enfermedades infecciosas Enfermedades infecciosas.
Sus antecedentes:
- Los parásitos intracelulares emplean diversas estrategias para invadir las células huésped y evadir las respuestas inmunes.
- La invasión eficiente, la explotación de nichos y la persistencia caracterizan a estos patógenos.
- Mientras que la mayoría de los parásitos dependen de los mecanismos del huésped para entrar, Apicomplexa utiliza una motilidad única para la penetración activa.
Objetivo del estudio:
- Para dilucidar los mecanismos por los cuales los parásitos de Apicomplexa invaden activamente las células del huésped.
- Para resaltar el papel de la motilidad dependiente de la polimerización de actina en la patogénesis de parásitos.
- Comprender el éxito evolutivo de los Apicomplexa debido a sus estrategias de invasión.
Principales métodos:
- Análisis de la dinámica de la actina durante la invasión de parásitos.
- Técnicas de microscopía para visualizar las interacciones parásito-huésped.
- Estudios genéticos para identificar proteínas clave involucradas en la motilidad del deslizamiento.
Principales resultados:
- Los parásitos apicomplejos emplean la motilidad "deslizante", impulsada por la polimerización de actina, para la penetración celular activa.
- Esta motilidad facilita la migración de parásitos, la diseminación de tejidos y la invasión de células huésped.
- La eficiencia de este mecanismo de invasión contribuye al éxito de Apicomplexa.
Conclusiones:
- El deslizamiento basado en actina es un determinante crítico de la patogénesis de Apicomplexa.
- Comprender este mecanismo ofrece objetivos potenciales para la intervención terapéutica.
- El estudio subraya la importancia de las estrategias de invasión impulsadas por parásitos en las enfermedades infecciosas.
Videos de Conceptos Relacionados
01:10Intracellular Movement of Viruses and Bacteria
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 virus that...
01:16Endocytosis
Eukaryotic cells acquire nutrients for growth and proliferation. Nutrients and other molecules that require degradation are internalized from the extracellular space by a process called endocytosis. The term ‘endocytosis' was first coined by Christian de Duve in 1963.
Endocytosis always begins with the plasma membrane enclosing an incoming molecule to form a transport vesicle which, in some cases, can be coated with a protein called ‘clathrin.' Endocytosed material is either sorted through...
Endocytosis always begins with the plasma membrane enclosing an incoming molecule to form a transport vesicle which, in some cases, can be coated with a protein called ‘clathrin.' Endocytosed material is either sorted through...
01:20Receptor-mediated Endocytosis
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
01:25Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
01:28Amebiasis
Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...