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Home NEWS Science News

New software automates brain imaging

Bioengineer by Bioengineer
February 6, 2017
in Science News
Reading Time: 2 mins read
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IMAGE

Credit: Max Planck Florida Institute for Neuroscience

When humans and animals learn and form memories, the physical structures of their brain cells change. Specifically, small protrusions called dendritic spines, which receive signals from other neurons, can grow and change shape indefinitely in response to stimulation. Scientists at Max Planck Florida Institute for Neuroscience (MPFI) have observed this process, known as long-term structural plasticity, in individual spines, but doing so requires substantial time and effort. A new technique, developed by MPFI researchers, automates the process to make observing and quantifying this growth far more efficient. The open-source method is available to any scientist hoping to image plasticity as it happens in dendritic spines using Scanimage. The work was published in January 2016 in the Public Library of Science journal, PLOS ONE.

Scientists working in Ryohei Yasuda's laboratory at MPFI are working to understand how proteins facilitate the plasticity of dendritic spines, the biological basis of learning and memory. They use 2-photon microscopy, an advanced technique for live-cell imaging, and glutamate uncaging, a technique that can induce plasticity in individual spines of interest using light. This is a meticulous process, wherein a scientist must continually focus the microscope on a single dendritic spine over an extended period, often an hour or longer. Michael Smirnov, Ph.D., Post-doctoral researcher at MPFI, developed a software that allows the computer to automatically track, image, and stimulate up to five dendritic spines at a time. "We can collect the data and figure out the proteins responsible much quicker with this [program] because we can run much more robust experiments," said Smirnov. In addition to increasing productivity, the ability to stimulate and image multiple spines in parallel greatly decreases the cost of running these experiments.

The software is a MATLAB-based module built for Scanimage, a program already commonly used in life science laboratories. It includes an electrically tunable lens in combination with a drift correction algorithm. These aspects allow the program to identify and correct for sample movement to ensure that the microscope is consistently focused on the spines of interest throughout the duration of the experiment. The interface provides an inexpensive method for automating experiments that observe up to five dendritic spines at a time, as opposed to a single spine using existing methods.

In contrast to previous open-sourced focusing programs, this one implements a highly capable and customizable focus and drift correction system to ensure that it can be used for a variety of biological applications. "The paper explains further modifications to make the process automated," said Smirnov. "It shares the open source code, so essentially, other people from other institutes can easily pick this up and use it for themselves."

###

About Max Planck Florida Institute for Neuroscience

The Max Planck Florida Institute for Neuroscience (Jupiter, Florida, USA) specializes in the development and application of novel technologies for probing the structure, function, and development of neural circuits. It is the first research institute of the Max Planck Society in the United States.

Media Contact

Jennifer Gutierrez
[email protected]
@mpfneuro

http://www.maxplanckflorida.org/

############

Story Source: Materials provided by Scienmag

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