Researchers at the Max Planck Florida Institute for Neuroscience and Kanazawa University, Japan, have succeeded in imaging structural dynamics of living neurons with an unprecedented spatial resolution
Imaging structural dynamics of living cells and neurons
While progress has been made over the past decades in the pursuit to optimize atomic force microscopy (AFM) for imaging living cells, there were still a number of limitations and technological issues that needed to be addressed before fundamental questions in cell biology could be address in living cells.
In their March publication in Scientific Reports, researchers at Max Planck Florida Institute for Neuroscience and Kanazawa University describe how they have built the new AFM system optimized for live-cell imaging.
The system differs in many ways from a conventional AFM: it uses an extremely long and sharp needle attached to a highly flexible plate. The system is also optimized for fast scanning to capture dynamic cellular events. These modifications have enabled researchers to image living cells, such as mammalian cell lines or mature hippocampal neurons, without any sign of cellular damage.
"We've now demonstrated that our new AFM can directly visualize nanometer-scale morphological changes in living cells", explained Dr. Yasuda, neuroscientist and scientific director at the Max Planck Florida Institute for Neuroscience.
In particular, this study demonstrates the capability to track structural dynamics and remodeling of the cell surface, such as morphogenesis of filopodia, membrane ruffles, pit formation or endocytosis, in response to environmental stimulants. An example of this capability can be visualized in movie 1, where a fibroblast is imaged before and after treatment with insulin hormone, which intensely enhances the ruffling at the leading edge of the cell. Another example is seen in movie 2, where the morphological changes of a finger-like neuronal protrusion in the mature hippocampal neuron are observed.
According to Dr. Yasuda, the successful observations of structural dynamics in live neurons present the possibility of visualizing the morphology of synapses at nanometer resolution in real time in the near future. Since morphology changes of synapses underlie synaptic plasticity and our learning and memory, this will provide us with many new insights into mechanisms of how neurons store information in their morphology, how it changes synaptic strength and ultimately how it creates new memory.
Link to publication in Scientific Reports: http://www.
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.
Jennifer Gutierrez | EurekAlert!
Further reports about: > AFM > Neuroscience > atomic force microscopy > atomic resolution > eukaryotic cells > image acquisition > light wavelength > live-cell imaging > living cells > morphological > morphological changes > morphology > nanoscale > neural circuits > neurons > spatial resolution > surface topography > synapses > synaptic
BigH1 -- The key histone for male fertility
14.12.2017 | Institute for Research in Biomedicine (IRB Barcelona)
Guardians of the Gate
14.12.2017 | Max-Planck-Institut für Biochemie
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
14.12.2017 | Health and Medicine
14.12.2017 | Physics and Astronomy
14.12.2017 | Life Sciences