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Unlocking Disease Mysteries: Nano Traps Offer New Insights Into Protein Clumps

November 22, 2023
in Science
Unlocking Disease Mysteries: Nano Traps Offer New Insights Into Protein Clumps
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Protein Traps

The image shows the protein traps, which consist of nanoscale chambers and polymers that form gates above. These “doors” are opened up by increasing the temperature by about 10 degrees, which is done electrically. Then the polymers change their shape to a more compact state so that proteins can pass in and out. Credit: Chalmers University of Technology | Julia Järlebark

Protein clumps are implicated in several challenging diseases such as ALS, Alzheimer’s, and Parkinson’s. Understanding the interaction of these proteins is complex. However, researchers at Chalmers University of Technology, Sweden, have discovered a new method for capturing many proteins in nano-sized traps. This novel approach allows for unprecedented insights into protein behaviors.

“We believe that our method has great potential to increase the understanding of early and dangerous processes in a number of different diseases and eventually lead to knowledge about how drugs can counteract them,” says Andreas Dahlin, professor at Chalmers, who led the research project.

Proteins that form clumps in our bodies cause a large number of diseases, including ALS, Alzheimer’s, and Parkinson’s. A better understanding of how the clumps form could lead to effective ways to dissolve them at an early stage, or even prevent them from forming altogether.

Andreas Dahlin

Andreas Dahlin, Professor, Department of Chemistry and Chemical Engineering at Chalmers University of Technology. Credit: Chalmers University of Technology | Mikael Terfors

Today, there are various techniques for studying the later stages of the process, when the clumps have become large and formed long chains, but until now it has been difficult to follow the early development, when they are still very small. These new traps can now help to solve this problem.

Can study higher concentrations for a longer time

The researchers describe their work as the world’s smallest gates that can be opened and closed at the touch of a button. The gates become traps, that lock the proteins inside chambers at the nanoscale. The proteins are prevented from escaping, extending the time they can be observed at this level from one millisecond to at least one hour. The new method also makes it possible to enclose several hundred proteins in a small volume, an important feature for further understanding.

“The clumps that we want to see and understand better consist of hundreds of proteins, so if we are to study them, we need to be able to trap such large quantities. The high concentration in the small volume means that the proteins naturally bump into each other, which is a major advantage of our new method,” says Andreas Dahlin. 

In order for the technique to be used to study the course of specific diseases, continued development of the method is required.

“The traps need to be adapted to attract the proteins that are linked to the particular disease you are interested in. What we’re working on now is planning which proteins are most suitable to study,” says Andreas Dahlin.

How the new traps work

The gates that the researchers have developed consist of so-called polymer brushes positioned at the mouth of nano-sized chambers. The proteins to be studied are contained in a liquid solution and are attracted to the walls of the chambers after a special chemical treatment.

When the gates are closed, the proteins can be freed from the walls and start moving towards each other. In the traps, you can study individual clumps of proteins, which provides much more information compared to studying many clumps at the same time. For example, the clumps can be formed by different mechanisms, have different sizes and different structures.

Such differences can only be observed if one analyses them one by one. In practice, the proteins can be retained in the traps for almost any length of time, but at present, the time is limited by how long the chemical marker – which they must be provided with to become visible – remains. In the study, the researchers managed to maintain visibility for up to an hour.

Reference: “Stable trapping of multiple proteins at physiological conditions using nanoscale chambers with macromolecular gates” by Justas Svirelis, Zeynep Adali, Gustav Emilsson, Jesper Medin, John Andersson, Radhika Vattikunta, Mats Hulander, Julia Järlebark, Krzysztof Kolman, Oliver Olsson, Yusuke Sakiyama, Roderick Y. H. Lim and Andreas Dahlin, 23 August 2023, Nature Communications.
DOI: 10.1038/s41467-023-40889-4

The study was funded by the European Research Council, Erling-Persson Family Foundation. 

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/unlocking-disease-mysteries-nano-traps-offer-new-insights-into-protein-clumps/

Tags: DiseasescienceUnlocking
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