We've updated our Privacy Policy to make it clearer how we use your personal data.

We use cookies to provide you with a better experience. You can read our Cookie Policy here.

Advertisement
Observing brain diseases in real time
News

Observing brain diseases in real time

Observing brain diseases in real time
News

Observing brain diseases in real time

Read time:
 

Want a FREE PDF version of This News Story?

Complete the form below and we will email you a PDF version of "Observing brain diseases in real time "

First Name*
Last Name*
Email Address*
Country*
Company Type*
Job Function*
Would you like to receive further email communication from Technology Networks?

Technology Networks Ltd. needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time. For information on how to unsubscribe, as well as our privacy practices and commitment to protecting your privacy, check out our Privacy Policy

A microfluidic device allows scientists to isolate nematodes and immobilize them on demand; Detailed photos of protein plaques can be taken throughout their growth -


For rent: 32 individual rooms for a combined surface area of 4cm2, heating and food included! Biologists and microfluidics specialists at École Polytechnique Fédérale de Lausanne (EPFL) have joined forces and developed a highly innovative research tool: a 2cm by 2cm 'chip' with 32 independent compartments, each of which is designed to hold a nematode - a widely used worm in the research world. The device is described in the journal Molecular Neurodegeneration.


See Also: Researchers provide first peek at how neurons multitask


"Unlike conventional cultures in petri dishes, this device lets us monitor individual worms rather than a population of them," said Laurent Mouchiroud, from EPFL's Laboratory of Integrative Systems Physiology.


Freeze frame

Each of these 'cells' is fed by microfluidic channels. These allow variable concentrations of nutrients or therapeutic molecules to be injected with precision. The ambient temperature can also be adjusted.


Each worm is observed through a microscope throughout its life. However, for more detailed investigations and very high resolution images, the worms need to be immobilized. "For this we use a temperature-sensitive solution," said Matteo Cornaglia, from the Laboratory of Microsystems. "We inject it in liquid form at 15°C, then bring the temperature up to 25°C, which transforms it into a gel. The worm is immobilized in just a few minutes, then we bring the temperature back down and rinse out the solution and the worm is able to move again."


Nematode worm gets caught in a gel: Animation still of C. elegans immobilized in a microfluidic chamber through the use of a special solution and temperature variations. Credit: EPFL
 


Protein aggregates in the cross-hairs

This method is fully reversible and does not affect the nematode's development. Using it, researchers can observe the formation of protein aggregates linked to several neurodegenerative diseases like Alzheimer's, Parkinson's and Huntington's. The same worm can be photographed several times, as the clusters develop. "This is totally new, and it will help us learn more not only about how these aggregates grow, but also about the tissue in which they form," said Mouchiroud. "In addition, we have already been able to test and observe the effect of certain drugs on how the clusters form."


Nematodes are very useful models for studying a number of human diseases. In many cases, they obviate the need to experiment on rodents. But until now, handling nematodes was a delicate affair. By simplifying the process, this new technology should accelerate research on numerous afflictions and how they are treated.


Note: Material may have been edited for length and content. For further information, please contact the cited source.

École Polytechnique Fédérale de Lausanne   press release


Publication

Cornaglia M et al. Automated longitudinal monitoring of in vivo protein aggregation in neurodegenerative disease C. elegans models.   Molecular Neurodegeneration, Published February 9 2016. doi: 10.1186/s13024-016-0083-6


Advertisement