Video Experimental Relacionado
Updated: May 4, 2026
08:41
Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2
Published on: November 5, 2021
2.9K
Varias vías para la resistencia del SARS-CoV-2 al nirmatrelvir
Sho Iketani1,2, Hiroshi Mohri1,2, Bruce Culbertson3,4
1Aaron Diamond AIDS Research Center, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
Nature
|November 9, 2022
Resumen
El SARS-CoV-2 puede desarrollar fácilmente resistencia al nirmatrelvir, un antiviral oral para el COVID-19. Los estudios in vitro muestran múltiples vías de mutación que conducen a la resistencia, lo que pone de relieve la necesidad de un diseño antiviral de próxima generación.
Área de la Ciencia:
- Virología
- Resistencia a los medicamentos antivirales
- Biología molecular
Sus antecedentes:
- El nirmatrelvir es un antiviral oral eficaz contra el SARS-CoV-2.
- Existen preocupaciones con respecto a la evolución de la resistencia del SARS-CoV-2 al nirmatrelvir, similar a otros antivirales.
Objetivo del estudio:
- Investigar la posibilidad de que el SARS-CoV-2 desarrolle resistencia in vitro al nirmatrelvir.
- Identificar las mutaciones y vías asociadas con la resistencia al nirmatrelvir.
Principales métodos:
- El paso in vitro del SARS-CoV-2 en presencia de nirmatrelvir.
- Secuenciación genómica para identificar mutaciones en la proteasa 3CL.
- Construcción y análisis de clones recombinantes del SARS-CoV-2.
Principales resultados:
- Las variantes altamente resistentes del SARS-CoV-2 surgieron a través de múltiples vías independientes.
- Se observaron mutaciones en 23 residuos diferentes de la proteasa 3CL.
- Las mutaciones específicas como T21I, P252L y T304I fueron precursores comunes, con E166V que conferían una resistencia significativa.
Conclusiones:
- El SARS-CoV-2 desarrolla fácilmente resistencia al nirmatrelvir in vitro a través de diversas rutas de mutación.
- La comprensión de estos mecanismos de resistencia es crucial para el diseño de inhibidores de proteasa de próxima generación.
Videos de Conceptos Relacionados
02:33Retroviruses
12.1K
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’...
12.1K
01:29Immune Response Against Viral Pathogens
2.4K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
2.4K
01:29Subviral Agents
933
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
933
01:30Inhibitors of Viral Protein Synthesis
58
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
58