Difference between revisions of "Methylation"
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One other hypothesis that may account for the widespread genetic defects found in ASD patients is that there may be abnormal methylation of brain-expressed genes on the X chromosome which in turn causes abnormal expression levels of genes important during development. These alternations cause one or more genes on the single X chromosome in males to be either partially silenced or over-expressed. This similarly happens in females, but the random X-chromosome inactivation might lesson autism predisposition and prevalence in females. This proposal is consistent with the findings that males make up a significantly larger amounts of ASD cases than females.<sup>2</sup> | One other hypothesis that may account for the widespread genetic defects found in ASD patients is that there may be abnormal methylation of brain-expressed genes on the X chromosome which in turn causes abnormal expression levels of genes important during development. These alternations cause one or more genes on the single X chromosome in males to be either partially silenced or over-expressed. This similarly happens in females, but the random X-chromosome inactivation might lesson autism predisposition and prevalence in females. This proposal is consistent with the findings that males make up a significantly larger amounts of ASD cases than females.<sup>2</sup> | ||
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| + | <div style="float:left; padding:10px; background:yellow; border:2px solid black;font-size:large;"><b>[[Genetics]]</b></div> | ||
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| + | <div style="float:right; padding:10px; background:yellow; border:2px solid black;font-size:large;"><b>[[Autism Spectrum Disorders| Main Page]]</b></div> | ||
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| + | ====References==== | ||
Revision as of 13:40, 1 April 2010
Methylation and ASD
One other hypothesis that may account for the widespread genetic defects found in ASD patients is that there may be abnormal methylation of brain-expressed genes on the X chromosome which in turn causes abnormal expression levels of genes important during development. These alternations cause one or more genes on the single X chromosome in males to be either partially silenced or over-expressed. This similarly happens in females, but the random X-chromosome inactivation might lesson autism predisposition and prevalence in females. This proposal is consistent with the findings that males make up a significantly larger amounts of ASD cases than females.2
