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A protein couple controls flow of information into the brain's memory center
Date:7/24/2014

These molecules, which have similar counterparts in humans, affect the connections between nerve cells and influence the transmission of nerve signals into the hippocampus, an area of the brain that plays a significant role in learning processes and the creation of memories. The results of the study have been published in the journal Neuron.

Brain function depends on the active communication between nerve cells, known as neurons. For this purpose, neurons are woven together into a dense network where they constantly relay signals to one another. However, neurons do not form direct contacts with each other. Instead they are separated by an extremely narrow gap, known as the synapse. This gap is bridged by 'neurotransmitters', which carry nerve signals from one cell to the next.

Docking stations

Specific molecular complexes in the cell's outer shell, so-called 'receptors', receive the signal by binding the neurotransmitters. This triggers an electrical impulse in the receptor-bearing cell and thus the nerve signal has moved on one neuron further.

In the current study, a team led by Dr Jakob von Engelhardt focused on the 'AMPA' receptors. These bind the neurotransmitter 'glutamate' and are particularly common in the brain. "We looked at AMPA receptors in an area of the brain, which constitutes the main entrance to the hippocampus," explains von Engelhardt, who works for the DZNE and DKFZ. "The hippocampus is responsible for learning and memory formation. Among other things it processes and combines sensory perception. We therefore asked ourselves how the flow of information into the hippocampus is controlled."

A pair of helpers

Dr von Engelhardt's research team specifically focused on two protein molecules: 'CKAMP44' and 'TARP Gamma-8'. These proteins are present, along with AMPA receptors, in the 'granule' cells, which are neurons that receive signals from areas outsi
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Contact: Dirk Förger
dirk.foerger@dzne.de
0049-228-433-02260
DZNE - German Center for Neurodegenerative Diseases
Source:Eurekalert

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