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Revealing the regulating mechanism behind signal transduction in the brain
Date:9/19/2008

ned a mystery.

A shared job with CYFIP1

Ilaria Napoli and her colleagues from Claudia Bagni's group are now discovering that FMRP cannot perform its job without another protein: CYFIP1. In a previous study, Claudia Bagni and her collaborators have shown that a reduced amount of FMRP in the brain increases the production of some neuronal proteins. The VIB researchers in Leuven have now elucidated the mechanism behind this. They have found that complexes of FMRP and CYFIP1 are located at the synapses and together suppress the local production of a number of proteins.

In the transduction of signals between brain cells, i.e. synaptic activation, CYFIP1 is released from the complex, whereby FMRP can no longer exercise its suppressing action. This is the impetus for the production of the proteins that are under the control of FMRP.

A change in the concentration of FMRP or CYFIP1 causes a disruption in this strict regulation of protein production. This, in its turn, causes diseases like Fragile X syndrome and Autism. Indeed, CYFIP1 has been recently found associated to Autism.

Importance of this research

With their research, Napoli and Bagni are shedding a bit more light on synapses in the brain − giving us more insight into learning and remembering, and also into a number of 'brain disorders'. We now understand that, through its absence, FMRP plays a role in diseases like Fragile X syndrome and Autism.


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Contact: Sooike Stoops
info@vib.be
329-244-6611
VIB (the Flanders Institute for Biotechnology)
Source:Eurekalert

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