Every time you turn around there is another study contradicting the last on antidepressant use and autism risk. An answer on why there are differences across different studies may be found in a new analysis published by University of Washington and SSM Dean Medical Group in Wisconsin this week. They showed that autism severity (not risk) is increased only with both a likely gene disruption AND following antidepressant exposure in pregnancy together. This suggests a double hit model similar to other complex neuropsychiatric disorders like depression. It also suggests that findings from other chemicals, like PBDE’s, may be dependent on gene / environment interactions too. After all, a new systematic review showed PBDE’s during pregnancy are bad for the IQ of the child. This provides insight on ASD risk and subtype given the multitude of possible genetic / environmental combinations out there.
This week two new publications reported on systematic reviews for nutritional and sensory treatments for ASD. This means the existing research was sorted, summarized, scrutinized and evaluated. They found insufficient evidence to show any dietary or nutritional therapy was effective, but sufficient evidence that sensory integration therapy helps people with ASD. In light of new data on heavy metals found in baby teeth, it’s important to remember that chelation is NOT effective and dangerous. While “insufficient evidence” does not rule out these interventions forever and always, lots more needs to be done in these areas to conduct rigorous experiments that don’t have any major shortcomings so they hold up to scrutiny.
Hear what you missed if you were unable to attend the Seaver Autism Conference on September 25th! Dr. David Skuse discusses “where are all the girls with autism”, summarizing evidence that some girls with high verbal IQ and autism might be missed, suggesting genes associated with high IQ may be protective against a diagnosis until adolescence. Also, ASF grantee Dr. Jennifer Foss-Feig describes how biomarkers can be used to improve personalized medicine. Finally, a summary and review of the new air pollution systematic review and meta analysis. Limited evidence does not equal none, and air pollution is a real problem. Here is a link to the paper: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0161851. All in 12 minutes.