...Witamy w FireFrog Media...

Every time you make a memory, somewhere in your brain a tiny filament reaches out from the neuron and forms an electrochemical connection to a neighbouring neuron.

A team of biologists at Vanderbilt University, headed by Associate Professor of Biological Sciences Donna Webb, studies how these connections are formed at the molecular and cellular level.
The filaments that make these new connection are called dendritic spines and, in a series of experiments described an the April 17 issue of the Journal of Biological Chemistry, the researchers reported that a specific signaling protein, Asef2, a member of a family of proteins that regulate cell migration and adhesion, plays a critical role in spine formation. This is significant because Asef2 has been linked to autism and the co-occurrence of alcohol dependency and depression.
"Alterations in dendritic spines are associated with many neurological and developmental disorders, such as autism, Alzheimer's disease and Down Syndrome" said Webb. "However, the formation and maintenance of spines I a very complex process that we are just beginning to understand. "
Neuron cell bodies produce two kinds of long fibers that weave through the brain: dendrites and axons. Axons transmit electrochemical signals from the cell body of one neutron to the dendrites of another neutron. Dendrites receive the incoming signals and carry them to the cell body. This is the way that neurons communicate with each other. As they wait for incoming signals, dendrites continually produce tiny flexible filaments called filopodia.
These  poke out from the surface of the dendrite  and wave about in the region between the cells searching for axons. At the same time biologists think that the axons secrete chemicals  of an unknown nature that attract the filopodia.
When one of the dendritic filaments makes contact with one of the axons, it begins  to adhere and to develop into a spine. The axon and spine form the two halves of a synaptic junction. New connections like this from the basis for memory formations and storage.
Autism has been associated with immature spines, which do not connect properly with axons to form new synaptic junction. However, a reduction in spines is characteristic of the early stage of Alzheimer's disease. This may help explain why individuals with Alzheimer's have trouble forming new memories. The formation of the spines is driven by actin, a protein that produces microfilaments and is part of the cytoskeleton. Webb and her colleagues showed that Asef2 promotes spine and synapse formation by activating another protein called Rac, which is known to regulate actin activity. They also discovered that yet another protein, spinophilin, recruits Asef2 and guides it to specific spines. "Once we figure out the mechanisms involved, then we may be able to find drugs that can restore spine formation in people who have lost it, which could give them back their ability to remember" said Webb.

Projekt POIG.01.04.00-30-196/12

Tytuł projektu: Zbudowanie prototypu innowacyjnego systemu rekomendacji zgodnych ze stylami użytkowników: FireStyle

Nr umowy: POIG.01.04.00-30-196/12-00

Wartość projektu: 14.949.474,00 zł

Udział Unii Europejskiej: 7.879.581,50 zł

Okres realizacji: 2013.01-2014.10

Fundusze Europejskie - dla rozwoju innowacyjnej gospodarki

 

Wyniki badań

  • Zbiory rozmyte

    W przyszłości tu będziemy publikowali wyniki badań związanych z tymi zbiorami.

  • Eksploracja danych

    Filarem badań w projekcie jest rozbudowa algorytmów związanych z eksploracją danych i tu również pojawią się wyniki badań.

  • Funkcja podobieństwa

    Budowa reguł związanych z istnieniem pojęcia stylu będzie wymagała zbudowania funkcji podobieństwa obiektów i stylów.