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Combined Genetic and Chemical Capsid Modifications of Adenovirus-Based Gene Transfer Vectors for Shielding and Targeting
Published on: October 26, 2018
Viral attachment strategies: the many faces of adenoviruses
Karolina Cupelli1, Thilo Stehle
1Interfaculty Institute of Biochemistry, University of Tuebingen, Germany.
Abstract:
The engagement of a cell-surface receptor by a virus is the first step in a complex process that culminates in the infection of the cell. Human adenoviruses are important pathogens that, depending on serotype, can utilize an impressive number of cellular receptors for attachment. Several structures of adenovirus attachment proteins in complex with their cognate ligands have been determined, enhancing our understanding of the underlying molecular recognition processes. Moreover, two new receptors for adenoviruses have also recently been identified. Using adenoviruses as an example, we examine the different attachment strategies that highly similar viral proteins within a single virus family can employ to engage different protein and carbohydrate receptors. For many viruses, consequences of such differences are altered tropism and pathogenicity. A better understanding of the parameters that determine specificity will therefore help to establish links between receptor tropism, spread, and disease. Moreover, it has relevance for the design and use of adenovirus-based gene delivery vehicles with improved properties and for the development of new antiviral strategies.
Insights
Human adenoviruses use diverse cell receptors for attachment, influencing disease and gene therapy. Understanding these viral attachment strategies is key to developing new antiviral treatments and improving adenovirus vectors.
Area of Science:
- Virology and Molecular Biology
- Cellular and Molecular Pathogenesis
Background:
- Viral engagement of cell-surface receptors initiates infection.
- Human adenoviruses exhibit diverse receptor tropism based on serotype.
- Previous structural studies elucidated adenovirus-ligand interactions.
Purpose of the Study:
- To examine diverse attachment strategies of adenoviruses.
- To explore how viral proteins engage various protein and carbohydrate receptors.
- To link receptor specificity to viral tropism, pathogenicity, and gene delivery applications.
Main Methods:
- Analysis of structural data for adenovirus attachment proteins and cognate ligands.
- Review of recent findings on novel adenovirus receptor identification.
- Comparative examination of attachment strategies across adenovirus serotypes.
Main Results:
- Adenoviruses utilize a wide array of cellular receptors for attachment.
- Structural insights reveal molecular mechanisms of receptor recognition.
- Two novel adenovirus receptors have been recently identified.
Conclusions:
- Viral attachment strategies dictate tropism and pathogenicity.
- Understanding receptor specificity aids in designing improved adenovirus gene delivery vectors.
- Knowledge of viral-host interactions is crucial for developing novel antiviral strategies.
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