Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists spot sneaky “neurodegenerative” iron at the European synchrotron

26.09.2007
Scientists suspect that iron accumulation plays a role in neurodegenerative processes such as Parkinson’s disease, but its distribution in neurons has never been observed because of the lack of techniques to do so. Until today.

Researchers from CNRS at the University of Bordeaux (France), University of Sevilla (Spain), INSERM Grenoble Institute of Neurosciences (France) and ESRF have studied the iron distribution in an in vitro model of neuronal cells that produce dopamine. Dopamine is a neurotransmitter, a chemical messenger between nerve cells in the mammalian brain.

Because dopamine can form stable complexes with iron, Richard Ortega, from the cellular chemical imaging group in Bordeaux, believed that dopamine may exert a protective effect by buffering iron in dopaminergic neurons and that this system might be at fault in Parkinson’s disease.

To test this hypothesis, the team used the new nanoprobe imaging experimental station recently developed at the European Synchrotron Radiation Facility to study the distribution of elements in cells. The resolution of 90 nm allowed scientists to visualize the elements distribution in the neurotransmitter vesicles. The nanoprobe consists on exciting the sample with a strongly focused X-ray beam and collecting the characteristic fluorescence signal that is re-emitted. This allows showing the different trace elements in a point, and then the sample is scanned point by point to form a complete multi-element image of the cells.

... more about:
»Distribution »Iron »dopamine »vesicles

The team shows that iron is stored within dopamine vesicles inside the neuronal cells. This is the first evidence of iron-dopamine co-localization in neuro-vesicles. The results also explain that when dopamine production is obstructed, the iron in the vesicles drastically decreases. This new function of dopamine vesicles in iron storage is of critical importance to understand the molecular mechanisms involved in Parkinson’s disease. In this neurological disorder, dopamine vesicular storage has been found impaired. According to these results, this would increase the levels of highly toxic iron-dopamine complexes in the neurons. The results are published in PLoS ONE on September 26.

The synchrotron nano-imaging station offers a new tool for researchers involved not only in the study of neurodegenerative diseases but also in many other fields where the determination of metal ions distribution at the subcellular level is important such as: metal toxicology, chemical carcinogenesis, and cellular pharmacology of inorganic compounds. This is one of the reasons why the team decided to submit their results in an open access journal such as PLoS ONE: “ We want the different scientific communities to know that this machine is available, and the best way is by letting everyone have access to the results”, explains Peter Cloetens, in charge of the station at ESRF.

Andrew Hyde | alfa
Further information:
http://www.plosone.org
http://www.plosone.org/doi/pone.0000925

Further reports about: Distribution Iron dopamine vesicles

More articles from Life Sciences:

nachricht A novel socio-ecological approach helps identifying suitable wolf habitats
17.02.2017 | Universität Zürich

nachricht New, ultra-flexible probes form reliable, scar-free integration with the brain
16.02.2017 | University of Texas at Austin

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Biocompatible 3-D tracking system has potential to improve robot-assisted surgery

17.02.2017 | Medical Engineering

Real-time MRI analysis powered by supercomputers

17.02.2017 | Medical Engineering

Antibiotic effective against drug-resistant bacteria in pediatric skin infections

17.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>