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Home NEWS Science News Chemistry

Viral impostors: Breakthrough for virus research

Bioengineer by Bioengineer
November 2, 2023
in Chemistry
Reading Time: 2 mins read
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Pseudoviruses, a tool for virus research
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Pseudoviruses resemble impostors: although harmless, they are designed in such a way that they can hardly be distinguished from their dangerous relatives. This makes them an invaluable tool in virus research. They can be used to precisely analyze infection pathways of dangerous virus variants.

Pseudoviruses, a tool for virus research

Credit: Gerti Beliu / RVZ, created with DALL-E 3

Pseudoviruses resemble impostors: although harmless, they are designed in such a way that they can hardly be distinguished from their dangerous relatives. This makes them an invaluable tool in virus research. They can be used to precisely analyze infection pathways of dangerous virus variants.

A major challenge in this research area so far has been to make the pseudoviruses reliably visible under the microscope. This is because conventional labelling methods impair the activity of the “impostors” and thus falsify the imaging.

A team from the Rudolf Virchow Center – Center for Integrative and Translational Bioimaging at Julius-Maximilians-Universität (JMU) Würzburg, led by Professor Markus Sauer and Dr. Gerti Beliu, has now developed a solution: By combining genetic code expansion and click chemistry, a unique recognition feature for pseudoviruses was created that leaves their activity unaffected. These findings have been now published in the journal ACS Nano.

New Horizons Open up in Virus Research

The novel “clickable” pseudoviruses are highly fluorescent. However, in terms of binding and penetration into cells, they have the same properties as their pathogenic relatives. Once inside the cells, however, they do not cause disease – this allows them to be handled under reduced biological risk levels in S1/2 standard laboratories.

Markus Sauer is enthusiastic: “This method opens up completely new horizons for us in virus research. It’s a leap forward in our ability to observe the complex dynamics of viral infections in living organisms using high-resolution microscopy methods.”

Innovation Meets Precision

Another advantage of the new method is its high detection efficiency. Compared to conventional immunostaining methods, the JMU team found a detection efficiency many times higher. This makes finer details and subtle processes of the infection process visible.

“The clickable pseudoviruses have the potential to revolutionise the way we study virus-cell interactions. It is as if we are using our microscopes to dive into a previously invisible world,” explains Gerti Beliu.



Journal

ACS Nano

DOI

10.1021/acsnano.3c07767

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Re-Engineered Pseudoviruses for Precise and Robust 3D Mapping of Viral Infection

Article Publication Date

1-Nov-2023

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