A rather interesting study.  Time will tell if there’s any teeth to the claims they make.

Research in the FASEB Journal describes discrete epigenetic changes of DNA in a certain subgroup of twins and siblings with autism

A new discovery raises hope that autism may be more easily diagnosed and that its effects may be more reversible than previously thought. In a new study appearing online in The FASEB Journal (http://www.fasebj.org), scientists have identified a way to detect the disorder using blood and have discovered that drugs which affect the methylation state (“DNA tagging”) of genes could reverse autism’s effects. This type of drug is already being used in some cancer treatments.

http://www.eurekalert.org/pub_releases/2010-04/foas-nso040810.php