07:43am Tuesday 17 October 2017

How Do Neurons and Blood Vessels “Talk” to Each Other?

FRANKFURT. Neurons and blood vessels often traverse the body side by side, a fact observed as early as the 16th century by the Flemish anatomist Andreas Vesalius. Only over the last ten years, however, researchers have discovered that the growth of neuronal and vascular networks is controlled by the same molecules. Prof. Amparo Acker-Palmer, a pioneer in this area, performs groundbreaking research on the communication between neurons and blood vessel cells in the brain. She hopes to use her findings to gain important insights into brain diseases such as dementia and mental illness. The European Research Council will fund her project with an Advanced Investigator Grant of 2.5 million Euros over the next five years.

“Most interesting is the interaction between neurons and blood vessels in the cerebral cortex. To date, we know very little about how neurons communicate with endothelial cells in order to structure a functional network in the brain.” explains Acker-Palmer. She plans to assess these processes in the layering of the cerebral cortex during embryonic development. Here, neuronal cells migrate in an inside out manner, while blood vessels grow in the opposite direction, from the pial surface towards the ventricular surface. Since these two growth processes are coordinated, Acker-Palmer suspects that they are controlled by the same signaling molecules. How dysfunction in the crosstalk may lead to cognitive impairments is one of the focuses of her research.

As model organisms her team uses genetically altered mice and zebrafish. Translucent zebrafish are the best suitable vertebrate model to visualize in vivo the dynamic events of cell-to-cell communication at the neurovascular interface. High-resolution electron microscopes will also be used to study these close connections between endothelial cells in the blood capillaries and glial cells at the blood-brain barrier. Glial cells wrap around the blood capillaries and prevent harmful substances from the blood stream from entering the brain.. Acker-Palmer and her team aim at deciphering the molecular signaling pathways regulating the neurovascular interface. “If we can intervene in the mechanism and temporarily open the blood-brain barrier, we can insert active agents and find new approaches for treating dementia and mental illness,” says the neurobiologist.

Amparo Acker-Palmer, born in Sueca, Valencia, Spain in 1968, studied biology and biochemistry at the University of Valencia, where she obtained her PhD in 1996. Then she moved to the European Molecular Biology Laboratory (EMBL) in Heidelberg to perform her postdoctoral work. In 2001, she moved to Martinsried, near Munich, to head an independent junior research group on signal transduction at the Max Planck Institute for Neurobiology. In 2007, she became Professor at the “Macromolecular Complexes” Center of Excellence at the Goethe University Frankfurt. Acker-Palmer is the Chair of the Molecular and Cellular Neurobiology Department at Goethe University Frankfurt since 2011. She received a Gutenberg Research College (GRC) fellowship from Johannes Gutenberg University Mainz in 2012, and she one of the leading scientists in the Rhine-Main Neuroscience Network (rmn2). In 2014, Acker-Palmer joined the Max Planck Society as Max Planck Fellow at the MPI for Brain Research in Frankfurt. Amparo Acker-Palmer is member of the Leopoldina German Academy of Natural Scientists and the Academia Europaea. She received the Paul Ehrlich Award for Young Scientists in 2010.

Pictures are available for download here: www.uni-frankfurt.de/55539781


Prof. Amparo Acker-Palmer.

Mouse brain: The microscope image of a mouse brain illustrates the close interaction between neurons (green), astrocytes (blue), and blood vessels (red) in the brain. The various cell populations appear in a specific pattern and interact with the neighboring cells.

Zebrafish:  In vivo-Imaging of the blood circulation system in a three-day-old zebrafish larva. The left picture shows a side view of the head, the middle picture a side view of the trunk and the right picture a back view of the head. Fluorescent reporter genes reveal that the blood vessels (green) are fully formed at this point. The individual blood cells (red) can also be seen circulating in the blood vessels.

Information:  Prof. Amparo Acker-Palmer, Institute of Cellular Biology and Neuroscience, Buchmann Institute of Molecular Life Sciences, Campus Riedberg, Tel.: (069) 798-42563, Acker-Palmer@bio.uni-frankfurt.de.

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