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Discovery of a new family of key mitochondrial proteins for the function and viability of the brain
Date:5/9/2012

A team headed by Eduardo Soriano at the Institute for Research in Biomedicine (IRB Barcelona) has published a study in Nature Communications describing a new family of six genes whose function regulates the movement and position of mitochondria in neurons. Many neurological conditions, including Parkinson's and various types of Charcot-Marie-Tooth disease, are caused by alterations of genes that control mitochondrial transport, a process that provides the energy required for cell function.

"We have identified a set of new genes that are highly expressed in the nervous system and have a specific function in a biological process that is crucial for the activity and viability of the nervous system", explains Eduardo Soriano, head of the Neurobiology and Cell Regeneration group at IRB Barcelona and full professor at the University of Barcelona (UB).

By means of comparative genomic analyses, the scientists have discovered that these genes are found only in more evolved mammals, the so-called Eutharia, these characterized by internal fertilization and development. "This finding indicates the relevance of mitochondrial biology. When the brain evolved in size, function and structure, the mitochondrial transport process also became more complex and probably required additional regulatory mechanisms", says Soriano. "Likewise, given the origin of the gene cluster, in the transition between primitive mammals, such as marsupials (kangaroos) and the remaining placental mammals, it is tempting to propose that the cluster is linked to the increased complexity of the cerebral cortex in the lineage that leads to humans", adds the full UB professor Jordi Garcia-Fernndez, collaborator in the study.

Correct brain function is highly energy-demanding. However, this energy must be finely distributed throughout neurons cells that have ramifications that can reach up to tens of centimetres in length, from the brain to the limbs. This cluster of gene
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Contact: Snia Armengou
sonia.armengou@irbbarcelona.org
34-934-037-255
Institute for Research in Biomedicine (IRB Barcelona)
Source:Eurekalert  

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