Video Experimental Relacionado
Updated: Jul 9, 2026
14:33
Generation, Purification, and Characterization of Cell-invasive DISC1 Protein Species
Published on: August 30, 2012
Syncytin es una proteína de envoltura retroviral cautiva involucrada en la morfogénesis placentaria humana
Nature
|February 29, 2000
Resumen
Los genes virales pueden integrarse en los mamíferos huéspedes. Un gen de la envoltura del retrovirus endógeno humano W (HERV-W), la sincitina, es vital para el desarrollo de la placenta al mediar la fusión celular.
Área de la Ciencia:
- Virología Virología.
- Genética La genética.
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- Los virus de los mamíferos a menudo adquieren genes de huésped para obtener ventajas virales.
- El escenario inverso, la integración del gen viral en la fisiología del huésped, se entiende menos.
Objetivo del estudio:
- Para investigar el papel de un gen viral, la sincitina de HERV-W, en la fisiología del huésped mamífero.
- Para determinar si la sincitina juega un papel en el desarrollo placentario humano.
Principales métodos:
- Identificó la sincitina como el gen de la envoltura de HERV-W.
- Examinó la expresión de sincitina en los tejidos placentarios.
- Evaluó las capacidades de fusión celular de Syncytin utilizando proteínas recombinantes y líneas celulares.
- Se ha probado la inhibición de la fusión utilizando anti-sincitina antiserum.
Principales resultados:
- La sincitina se expresa principalmente en los sincitiotrofoblastos placentarios.
- La sincitina recombinante induce la formación de células multinucleadas (sincicias) en varios tipos de células.
- El antisuero anti-syncytin inhibe la fusión en las células trofoblásticas humanas.
Conclusiones:
- La sincitina, un gen viral, es crucial para la morfogénesis placentaria humana.
- La sincitina probablemente media la fusión de citotrofoblastos durante el desarrollo placentario.
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.
02:08Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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’...
02:32Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
01:26Size and Structure of Viral Genomes
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...