A new ways for the environment to affect genetic expression

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/

SPARK it up

You may have heard of SPARK, it is the largest genetics research project in autism spectrum disorders.  But have they found anything?  Yes!  Pam Feliciano of SPARK discusses what the project is, what a pilot study has found, and how the results might help families with ASD.  In addition, a different but complementary study identified new genes associated with autism.  Given that one of them is a target of environmental factors, it’s time to spark up studies looking at gene x environment interactions as well.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6707204/

https://escholarship.org/uc/item/36f811zq

https://www.tandfonline.com/doi/full/10.1080/15592294.2019.1656158