Video Experimental Relacionado
Updated: Jul 17, 2026
07:15
Invasion of Human Cells by a Bacterial Pathogen
Published on: March 21, 2011
Infección y replicación del virus de Epstein-Barr en un sistema de células epiteliales humanas
Q X Li1, L S Young, G Niedobitek
1Department of Cancer Studies, University of Birmingham, UK.
Nature
|March 26, 1992
Resumen
El virus de Epstein-Barr infecta las células epiteliales en un nuevo modelo de cultivo celular, revelando diferencias en la replicación viral no observadas en las infecciones de células B. Este avance avanza la comprensión de la infección epitelial por este virus oncogénico.
Área de la Ciencia:
- Virología Virología.
- Biología celular Biología celular.
- Oncología Oncología.
Sus antecedentes:
- El virus de Epstein-Barr (EBV), un herpesvirus humano, tiene potencial oncogénico e infecta los linfocitos B y el epitelio escamoso estratificado.
- La interacción del EBV con las células B está bien estudiada, pero su infección de las células epiteliales sigue siendo poco conocida debido a la falta de modelos de cultivo celular adecuados.
Objetivo del estudio:
- Desarrollar un modelo de cultivo celular in vitro para el estudio de la infección por el virus de Epstein-Barr de las células epiteliales.
- Investigar los mecanismos y resultados de la infección y la replicación del EBV en las células epiteliales.
Principales métodos:
- Desarrollo de un modelo de cultivo celular utilizando líneas celulares epiteliales humanas transfectadas que expresan CR2.
- Infección de estas líneas celulares con EBV y análisis de la expresión y replicación de genes virales.
- Inducción de la diferenciación epitelial para estudiar la progresión del ciclo productivo del virus.
Principales resultados:
- Las células epiteliales que expresan CR2 se unen eficazmente y se infectan con el EBV.
- Las células infectadas expresan ARNEBER y EBNA-1, pero no otras proteínas latentes.
- La diferenciación epitelial puede inducir hasta el 30% de las células infectadas en el ciclo productivo del virus, con algunos logrando la replicación completa.
- Se observaron diferencias significativas en la eficiencia de la infección epitelial entre las cepas de EBV de laboratorio, independientemente de su actividad transformadora del crecimiento de células B.
Conclusiones:
- Se ha establecido un nuevo y eficaz modelo de cultivo celular para el estudio de la infección epitelial por EBV.
- Este modelo demuestra que el EBV puede replicarse de manera productiva en células epiteliales diferenciadas.
- Las cepas de EBV exhiben un tropismo variable para las células epiteliales, lo que sugiere propiedades biológicas distintas más allá del potencial de transformación de las células B.
Videos de Conceptos Relacionados
00:57Viral Recombination
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
01:20Infection
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...
01:23Skin Diseases and Disorders
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
01:24Smallpox
Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
01:28Herpes
Herpes simplex type 1 (HSV‑1) is a widespread pathogen responsible for orolabial lesions. It is an enveloped, double-stranded DNA (dsDNA) virus belonging to the family Herpesviridae. Once the virus infects a host cell, its double‑stranded DNA genome is delivered into the nucleus, where a coordinated cascade of immediate‑early, early, and late gene expression directs viral DNA replication, structural protein synthesis, and virion assembly. After primary infection of epithelial cells, HSV-1...
01:20Chickenpox
Chickenpox is an acute, highly contagious disease caused by the varicella-zoster virus (VZV), a double-stranded DNA virus belonging to the Herpesviridae family. Its transmission occurs primarily through the inhalation of respiratory droplets or direct contact with vesicular fluid from skin lesions. The incubation period typically ranges from 10 to 21 days, during which the virus replicates and disseminates through sequential phases within the host. Although generally self-limiting in children,...