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Genetic Analysis Reveals Range Of Rett Syndrome

Date:
March 13, 2008
Source:
Telethon Institute for Child Health Research
Summary:
The first comprehensive analysis of the clinical effects of genetic mutations involved in Rett syndrome will enable affected families to receive a more accurate indication of their child's prognosis.

The first comprehensive analysis of the clinical effects of genetic mutations involved in Rett syndrome will enable affected families to receive a more accurate indication of their child's prognosis.

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The research was undertaken by an international collaboration based on information provided by families and clinicians from around the world to the InterRett online database at the Telethon Institute for Child Health Research.

Report co-author, Dr Helen Leonard, who heads the Australian Rett Syndrome Study, said the findings have revealed a wide variability in the effects of the syndrome.

"This is the first time that we've had quality information about a sufficient number of cases to be able to do a rigorous analysis comparing specific genetic mutations with they way the disorder is manifested in affected girls," Dr Leonard said.

"While Rett syndrome is caused by a mutation on the MECP2 gene on the X chromosome, variations in the mutation determine the severity of symptoms.

"Our analysis of eight common mutations that account for two-thirds of cases, showed considerable variation in abilities."

Dr Leonard said the information would be of great value to families, clinicians and carers. "Many parents have found the lack of information about their daughter's prognosis very distressing and will welcome a clearer indication of what they might expect in the future," Dr Leonard said.

"Our findings really emphasised how much variability there is in the syndrome and we hope that information will assist with earlier diagnosis."

Dr Leonard said that girls with the milder form of Rett syndrome may retain some language, hand function and the ability to walk. In contrast, those with the severe form don't show the usual pattern of regression but are affected from birth.

InterRett is an online database that now contains information on more than 1200 people from around the world. It is fully funded by the International Rett Syndrome Foundation.

The results have just been published in the March edition of the journal Neurology.

About Rett Syndrome

Rett syndrome is a relatively rare but serious neurological disorder that usually affects girls. The clinical diagnosis has often been uncertain in early childhood as the symptoms may be confused with those occurring in other disorders such as autism, cerebral palsy and developmental delay.

Rett syndrome affects around one in every 8,500 female births. Mutations in the MECP2 gene on the X chromosome have been identified as a cause of Rett syndrome. There is no known cure.


Story Source:

The above story is based on materials provided by Telethon Institute for Child Health Research. Note: Materials may be edited for content and length.


Cite This Page:

Telethon Institute for Child Health Research. "Genetic Analysis Reveals Range Of Rett Syndrome." ScienceDaily. ScienceDaily, 13 March 2008. <www.sciencedaily.com/releases/2008/03/080311092155.htm>.
Telethon Institute for Child Health Research. (2008, March 13). Genetic Analysis Reveals Range Of Rett Syndrome. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2008/03/080311092155.htm
Telethon Institute for Child Health Research. "Genetic Analysis Reveals Range Of Rett Syndrome." ScienceDaily. www.sciencedaily.com/releases/2008/03/080311092155.htm (accessed April 1, 2015).

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