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A new ways for the environment to affect genetic expression

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You have maybe heard about how environmental exposures after conception or birth may affect genetic expression and then risk of developing autism. But what research has been done to look at preconceptional exposures, presumably exposures that affect the cells that then give rise to sperm and eggs? Turns out they are susceptible to some environmental exposure too, which could lead to a change in the way genes are expressed in the embryo, the fetus, and then the child. Want to know more? Jill Escher just published a study with scientific colleagues about this hypothesis and she explains it in this week’s podcast.

https://pubmed.ncbi.nlm.nih.gov/34596807/

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How is ASD diagnosis happening right now?

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Early on in the pandemic, clinicians struggled with how to turn in-person evaluations into Telehealth evaluations. One year later: what have they done? How have they modified? How do parents feel about these changes? Should they stay or should they go? This topic will be featured on our ASF Day of Learning on April 22nd as well. Also COVID related, new data on the effects of maternal immune infection on autism outcomes in children – with a bright light at the end of the story. At least a bright light at some maternal infections. Listen to the opening song and keep on “staying away”.

https://pubmed.ncbi.nlm.nih.gov/33730320/

https://pubmed.ncbi.nlm.nih.gov/33720503/

https://www.nature.com/articles/s41593-020-00762-9

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Better ways of subgrouping ASD?

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On this week’s podcast, two new studies which explore the concept of subgroups of ASD are described. First, a “genetics-first” approach. Dr. Samuel Chawner at Cardiff University compares autism symptoms in those with copy number variants to those with no known genetic cause and asks: how similar to each other are they and can genetics be a way to subgroup? Second, the UC Davis MIND Institute explores the specificity of a subgroup of ASD based on presence of autoantibodies in mothers. Should there be a mix of the two and how do families interpret these findings? Listen here:

https://pubmed.ncbi.nlm.nih.gov/33384013/

https://pubmed.ncbi.nlm.nih.gov/33483694/