Video Experimental Relacionado
Updated: Aug 7, 2026
07:21
Production of Adeno-Associated Virus Vectors in Cell Stacks for Preclinical Studies in Large Animal Models
Published on: June 30, 2021
Adquisición del gen rep del virus adeno-asociado humano tipo 2 por el herpesvirus humano tipo 6
B J Thomson1, S Efstathiou, R W Honess
1Division of Virology, National Institute for Medical Research, Mill Hill, London, UK.
Nature
|May 2, 1991
Resumen
La infección por el herpesvirus humano tipo 6 (HHV-6) es común en adultos. Los investigadores descubrieron un gen en el HHV-6 homólogo al gen de repetición del virus adeno-asociado, que podría afectar el ciclo de vida del HHV-6 y las células CD4.
Área de la Ciencia:
- Virología Virología.
- Biología Molecular Biología Molecular
- Inmunología Inmunología.
Sus antecedentes:
- El herpesvirus humano tipo 6 (HHV-6) es un herpesvirus extendido en las poblaciones adultas.
- El HHV-6 infecta los linfocitos CD4+ y está asociado con trastornos linfoproliferativos.
- El HHV-6 puede transactivar las repeticiones terminales largas del VIH y acelerar la expresión génica del VIH y la muerte celular CD4.
Objetivo del estudio:
- Para identificar genes dentro del HHV-6 que puedan influir en su actividad biológica.
- Para investigar el posible intercambio genético entre virus de ADN eucariotas.
Principales métodos:
- Análisis de secuencia de HHV-6 para identificar genes homólogos.
- Comparación del gen HHV-6 identificado con genes virales conocidos, específicamente el gen de repetición del virus adeno-asociado tipo 2 (AAV-2).
Principales resultados:
- Se identificó un gen que codifica un polipéptido de 490 aminoácidos homólogo al gen de repetición AAV-2 en HHV-6.
- El gen AAV-2 es crucial para la replicación del ADN viral, la regulación de la expresión génica y la inhibición de la transformación celular.
Conclusiones:
- La presencia de un homólogo del gen rep en el HHV-6 sugiere una transferencia genética natural entre los virus de ADN.
- Esta adquisición probablemente tenga implicaciones significativas para el ciclo de vida del HHV-6 y su impacto en las células CD4 del huésped.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:10Retrovirus Life Cycles
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
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.
02:33Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
01:03Rous Sarcoma Virus (RSV) and Cancer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
01:27Cytomegalovirus Disease
Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
01:23Genital Herpes
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex virus type 2 (HSV-2), though herpes simplex virus type 1 (HSV-1) is increasingly implicated in genital infections, particularly among younger populations. Transmission occurs mainly through sexual contact, with asymptomatic viral shedding serving as a major route of spread. This characteristic makes HSV-2 difficult to control at a population level, as individuals may unknowingly transmit the virus even in the...