Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers identify a new form of disease gene associated with Rett syndrome

23.03.2004


Scientists at The Hospital for Sick Children (Sick Kids), the Centre for Addiction and Mental Health (CAMH) and the University of Toronto (U of T) have identified an alternate form of the disease gene and protein for the neurodevelopmental condition Rett syndrome. This discovery is being incorporated into a new molecular test that will aid not only in the diagnosis of Rett syndrome, but also for other developmental disabilities. This research is reported in the April issue of the scientific journal Nature Genetics (available online March 21, 2004).



"The previously identified gene MECP2 was only found in approximately 80 per cent of patients with Rett syndrome," said Dr. Berge Minassian, the study’s principal investigator, a Sick Kids neurologist and scientist, and an assistant professor in the Department of Paediatrics at U of T. "Our discovery suggests that a defective alternate form of the MECP2 gene causes Rett syndrome."

The protein produced by the new alternate gene is different than the protein that was first associated with Rett syndrome in 1999. In the current work, this novel molecule was found to be disrupted in some Rett syndrome patients while the original form of the protein remained intact. The new protein is also the predominant form in the brain, strongly indicating that it is the disease-relevant protein.


"Our group’s interest in Rett syndrome is relatively recent," said Dr. John Vincent, co-principal investigator of the study, head of the Molecular Neuropsychiatry & Development laboratory at CAMH, and assistant professor in the Department of Psychiatry at U of T. "Our fresh look at this problem was less affected by established dogma, and allowed us this new insight."

Rett syndrome is a genetic neurological disorder that occurs almost exclusively in girls, as the gene is found on the X chromosome. Babies with Rett syndrome appear to develop normally until 6 to 18 months of age. They then enter a period of regression, losing speech and other skills they had acquired. Most of the children develop seizures, repetitive hand movements, developmental delay, and motor-control problems, and they often have autistic tendencies. Rett syndrome is believed to affect 1 in 10,000 females.

"Since the Rett syndrome genetic tests are used not only to confirm a diagnosis of Rett syndrome, but also for ’negative inclusion’ in other developmental disabilities such as cerebral palsy, forms of mental retardation and autism, we expect this new discovery to have great clinical utility," added Dr. Minassian.

Kathy Hunter, president and founder of the International Rett Syndrome Association (IRSA), applauded the new paper: "This is truly an exciting time for Rett syndrome research and is a major leap forward in our understanding of how MECP2 works in the nervous system. This critical discovery may be put into immediate practice. This finding will gladden the hearts of the thousands of families that must meet the challenges of Rett syndrome everyday. It brings us all hope that we are closer to finding answers that can ease our struggles."


This research was enabled through the assistance of clinical collaborators Dr. Carolyn Schanen at Nemours Biomedical Research, Alfred I. duPont Hospital for Children in Delaware, Dr. Patrick MacLeod at the University of British Columbia, and Dr. Michael Friez at Greenwood Genetic Center in South Carolina. This research was supported by the Canadian Institutes of Health Research – Neuromuscular Research Partnership, The Hospital for Sick Children Foundation, and a U of T Dean’s Award to Dr. Vincent.

The Hospital for Sick Children, affiliated with the University of Toronto, is Canada’s most research-intensive hospital and the largest centre dedicated to improving children’s health in the country. Its mission is to provide the best in family-centred, compassionate care, to lead in scientific and clinical advancement, and to prepare the next generation of leaders in child health. For more information, please visit www.sickkids.ca.

The Centre for Addiction and Mental Health is the largest addiction and mental health organization in Canada. CAMH is a Pan American Health Organization and World Health Organization Collaborating Centre and a teaching hospital fully affiliated with the University of Toronto. For more information, visit www.camh.net.

Founded in 1827, the University of Toronto is Canada’s leading teaching and research university with more than 60,000 students and 300,000 alumni worldwide. The university comprises 31 divisions, colleges and faculties on three campuses. This includes 14 professional faculties, numerous research centres and Canada’s largest university library system – the fifth largest research library in North America. For the tenth consecutive year, U of T has taken the top spot among medical/doctoral universities in the annual Maclean’s magazine university ranking.

For more information, please contact:

Laura Greer, Public Affairs
The Hospital for Sick Children
(416) 813-5046
laura.greer@sickkids.ca

Sylvia Hagopian, Media Relations Coordinator
The Centre for Addiction and Mental Health
416-595-6015
sylvia_hagopian@camh.net

Laura Greer | EurekAlert!
Further information:
http://www.sickkids.ca
http:// www.camh.net
http://www.utoronto.ca/

More articles from Health and Medicine:

nachricht Researchers release the brakes on the immune system
18.10.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>