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Scientists Uncover Possible Therapeutic Targets for Rare Autism Spectrum Disorder

Date:
January 31, 2017
Source:
Fred Hutchinson Cancer Research Center
Summary:
Researchers have uncovered 30 genes that could, one day, serve as therapeutic targets to reverse Rett syndrome, a rare neurological disorder that affects only girls and is a severe form of an autism spectrum disorder.
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Researchers have uncovered 30 genes that could, one day, serve as therapeutic targets to reverse Rett syndrome, a rare neurological disorder that affects only girls and is a severe form of an autism spectrum disorder.

The study, led by scientists at Fred Hutchinson Cancer Research Center in Seattle, will be published January 30 in the Proceedings of the National Academy of Sciences.

There are currently no treatments specific to Rett syndrome, which affects approximately 15,000 girls and women in the U.S. and 350,000 around the world. Girls with Rett syndrome are born healthy and seem like any other baby up to one or two years of age. But then they start missing milestones and backslide in development.

"They have this period of normal development, and then it's taken away from them," said Dr. Antonio Bedalov, who led the study and is a clinical researcher at Fred Hutch. "It's devastating for the families."

The disorder is tied to a genetic defect in the MeCP2 gene, which is carried on the X chromosome. Girls, of course, have two copies of this chromosome but one X is silenced in every cell. Even though, on average, half of a girl's cells will produce the healthy version of this X-linked gene, the mutation in the other half of cells is enough to trigger the symptoms of the disorder.

Using adult mouse cells in the lab, Bedalov and his colleagues identified a way to partially reawaken the "inactive X," the X chromosome that is silenced in every cell. The researchers were also able to reactivate the normal copy of the MeCP2 gene.

Bedalov emphasized that the findings are still in the preclinical stage and that therapeutics are a long ways off.

But it's a start, Bedalov said. Because their approach leads to the reactivation of the entire chromosome, it could also apply to other, similar disorders that involve the X chromosome.


Story Source:

Materials provided by Fred Hutchinson Cancer Research Center. Original written by Molly McElroy. Note: Content may be edited for style and length.


Journal Reference:

  1. Smitha Sripathy, Vid Leko, Robin L. Adrianse, Taylor Loe, Eric J. Foss, Emily Dalrymple, Uyen Lao, Tonibelle Gatbonton-Schwager, Kelly T. Carter, Bernhard Payer, Patrick J. Paddison, William M. Grady, Jeannie T. Lee, Marisa S. Bartolomei, and Antonio Bedalov. Screen for reactivation of MeCP2 on the inactive X chromosome identifies the BMP/TGF-β superfamily as a regulator of XIST expression. Proceedings of the National Academy of Sciences, January 2017 DOI: 10.1073/pnas.1621356114

Cite This Page:

Fred Hutchinson Cancer Research Center. "Scientists Uncover Possible Therapeutic Targets for Rare Autism Spectrum Disorder." ScienceDaily. ScienceDaily, 31 January 2017. <www.sciencedaily.com/releases/2017/01/170131080158.htm>.
Fred Hutchinson Cancer Research Center. (2017, January 31). Scientists Uncover Possible Therapeutic Targets for Rare Autism Spectrum Disorder. ScienceDaily. Retrieved May 29, 2017 from www.sciencedaily.com/releases/2017/01/170131080158.htm
Fred Hutchinson Cancer Research Center. "Scientists Uncover Possible Therapeutic Targets for Rare Autism Spectrum Disorder." ScienceDaily. www.sciencedaily.com/releases/2017/01/170131080158.htm (accessed May 29, 2017).

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