Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Parkinson’s Protein Protects Neurons from Stress Induced Cell Death:“Parkin” Activates Survival Mechanism of Neuronal Cells

22.05.2007
Parkinson’s disease, also known as shaking palsy, is one of the most frequent diseases of the nervous system. Cell death of neurons in specific regions of the midbrain is leading to the onset of the disease. However, the the causes for this extensive cell death are unknown.

Especially in cases of early manifestation of the disease mutations in the so-called parkin gene are of great significance. In a collaborative effort the groups of Dr. Konstanze Winklhofer (Ludwig-Maximilians-University Munich) and Dr. Daniel Krappmann (GSF – Research Center for Environment and Health, Neuherberg) have now been able to reveal a novel function for the Parkin protein.

The scientists could show that Parkin prevents the induction of neuronal cell death. As reported in the “Journal of Neuroscience“, the protein activates a survival mechanism which had been known for its prominent role in immune response.

Usually, Parkinson’s disease occurs after the age of 50 and in Germany about 400,000 people are affected. It is characterized by a decline of neurons in the so-called Substantia Nigra, a structure in the midbrain that produces dopamine. The resulting deprivation of this messenger substance causes symptoms like muscular tremor at rest and restricted mobility and even complete immobility. Characteristic deposits are found in the brain, the Lewy corpuscles.

... more about:
»Cell »Parkin »Parkinson »Winklhofer

Little is known about the causes of Parkinson’s disease. It has only been known for a few years that ten to fifteen per cent of all cases are associated with mutations in certain genes.

“The parkin gene is of special interest here”, says Winklhofer. “One effect of its inactivation is that the Parkin protein loses its physiological function. This genetic defect plays a role for hereditary Parkinson’s disease, which may lead to an early onset of the disease.”

However, inactivation of the Parkin protein could also contribute to sporadic forms of the disease. In these cases massive oxidative stress probably results in misfolding and aggregation of the protein. “Interestingly, misfolding of Parkin proteins has recently been observed in the brain of patients with sporadic Parkinson’s disease”, Winklhofer reports.

The scientists could now show in their study that Parkin protects the neuronal cells by mediating the activation of the nuclear protein NF-?B (“Nuclear Factor-kappaB“). This protein is known for triggering a survival programme in many human cells, which prevents cell death under stress conditions. The experiments indicate that mutations in the parkin gene result in an impaired activation of NF-?B.

“This, however, promotes an enhanced susceptibility of neurons to stress-induced cell death”, says Winklhofer. “Further studies will now have to show whether these findings about the function of Parkin in the activation of cellular survival programmes can contribute to the development of new strategies for the treatment of Parkinson’s patients.”

Michael van den Heuvel | alfa
Further information:
http://www.gsf.de/neu/Aktuelles/Presse/2007/parkinson_en.php

Further reports about: Cell Parkin Parkinson Winklhofer

More articles from Life Sciences:

nachricht Discovery of a Key Regulatory Gene in Cardiac Valve Formation
24.05.2017 | Universität Basel

nachricht Carcinogenic soot particles from GDI engines
24.05.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>