Cryo-CLEM in situ imaging of adenovirus stepwise disassembly

Información del proyecto

CryoCLEMAV

Identificador del acuerdo de subvención: 101107060

DOI

10.3030/101107060

Proyecto cerrado

Fecha de la firma de la CE 29 Marzo 2023

Fecha de inicio 16 Enero 2024

Fecha de finalización 15 Enero 2026

Financiado con arreglo a

• Marie Skłodowska-Curie Actions (MSCA)

Coste total

Sin datos

Aportación de la UE

€ 165 312,96

Coordinado por

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Spain

Periodic Reporting for period 1 - CryoCLEMAV (Cryo-CLEM in situ imaging of adenovirus stepwise disassembly)

Período documentado: 2024-01-16 hasta 2026-01-15

Resumen del contexto y de los objetivos generales del proyecto

Adenoviruses (AdVs) are very contagious viruses widespread in vertebrated. Human AdVs infections mainly affect children and immune-supressed people. On the other hand, AdV-derived vectors, nanocarriers and vaccines have turn out to be efficient therapeutic tools. Understanding AdVs disassembly mechanisms is vital to advance research in antiviral drugs, gene therapies, nanocarriers and vaccines. AdV particles’ metastability is key for surviving environmental conditions and cell defences, but at the same time, these particles should disassemble at the appropriate time and place during virus entry. The particle size and the speed of the process challenges the visualization of these events inside the cell. CryoCLEMAV aims at providing unprecedented structural insight on the process of virus entry and disassembly by combining virology with the cutting-edge microscopy techniques: correlative light and electron microscopy (cryo-CLEM), cryo-electron tomography (cryo-ET), FIB-milling and subtomogram averaging. This approach will allow to recapitulate the process with a previously unreachable resolution and specificity in a near native context of the host cell. CryoCLEMAV is an ambitious project whose success will be firmly supported by merging my expertise in virology and super resolution microscopy with the host lab knowledge and resources in cryo-EM techniques and adenovirus biology. Outcomes of this project will contribute to the development of several cryo-electron microscopy techniques and to the field of adenovirus biology, also impacting in the expanding field of adenovirus-derived therapeutic tools. All together will advance the research work of my host group, benefit the host organization (CNB-CSIC), and boost my professional career.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

During the course of the fellowship, the project focused on investigating virus–host interactions using advanced imaging approaches. The research combined fluorescence microscopy, super-resolution microscopy, and cryo-electron microscopy to study the mechanisms of viral infection at different spatial scales.
A major part of the work was devoted to characterizing the entry pathway of adenoviruses into host cells. Using advanced fluorescence microscopy and complementary structural approaches, the project investigated the cellular mechanisms involved in viral entry and the intracellular trafficking of viral particles. These studies provided new insights into the molecular steps that govern adenovirus infection and its interaction with host cellular components.
In addition to these biological discoveries, the project contributed to the application of advanced imaging workflows integrating multiple microscopy techniques. These methodological approaches enabled the visualization of virus–host interactions with high spatial resolution and can be applied to study other viral systems and cellular processes.
Overall, the project generated new knowledge on virus–host interactions, particularly regarding adenovirus entry mechanisms. These findings represent an important contribution to the fields of virology, structural biology, and advanced microscopy.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

The project advances the current understanding of virus–host interactions by combining advanced fluorescence microscopy, super-resolution microscopy, and cryo-electron microscopy to investigate viral infection mechanisms at multiple spatial scales.
One of the main contributions of the project is the characterization of the adenovirus entry pathway using complementary imaging approaches. While previous studies have described aspects of adenovirus infection, the integration of advanced microscopy techniques provides a more detailed view of the cellular processes involved in viral entry and intracellular trafficking.
Beyond the biological discoveries, the project also demonstrates the value of integrating multiple imaging techniques to study complex virus–host interactions. The methodological framework applied in the project provides new opportunities for investigating viral infection processes with high spatial resolution.
Further research may extend these approaches to other viral systems and explore the functional consequences of virus-induced genome reorganization. These advances may ultimately contribute to the development of new antiviral strategies and improved viral vector technologies.