genetics – ASF Weekly Science Podcasts

This week we talk to Dr. Dan Geschwind from UCLA who was funded by the Autism Data Science Initiative to study thousands of environmental chemicals and medicines across various genetic backgrounds. A decade ago, this study would have taken a decade, but through new technology, robotics, and existing knowledge about genes and these chemicals, it is automated and can be done is 3 years. Dr. Geschwind will explain how he is using cells from people with autism to identify potential environmental factors that may contribute to a diagnosis of autism, or exacerbate or aleviate symptoms of autism and developmental disorders. This is incredibly cool – have a listen to what this ADSI project is doing and what it can tell scientists about what is important to focus on in autism.

This week we talk to Drs. Steve Scherer, Lisa Bradley and Graham Collingridge who recently published research that shows the gene PTCHD1-AS influences social functioning in humans and mice, without influencing intellectual deficits. This is the newest data that shows a single gene can control social communication and not some of the other comorbid features of ASD. They review the data around genetic influences in autism, why the knowledge of the role of genes in autism has exploded in the past decade, evidence that specific genes lead to an autism diagnosis, and more specifically, what this gene does in the brain and why it took so long to identify it.

Here is the article: open access! https://www.nature.com/articles/s41586-026-10515-6

Need a genetic test? Here are some resources:

www.startgenetic.com

We have talked already about the link between autism and dementia, however a lesser known association is the one between autism and another disorder of aging: Parkinson’s Disease. A recent presentation at INSAR revealed what is known about the relationship, why they are related, what causes the association and what people with autism can do to possibly mitigate the onset of dementia and Parkinson’s Disease. Thank you to Dr. Blair Braden and Samantha Harker and Manuela Velez Galindo from the Autism and Brain Aging Lab at Arizona State University (@autismbrainaginglab @asuresearch) for joining this podcast and explaining the findings so far and what they mean for individuals and families with autism.

https://pubmed.ncbi.nlm.nih.gov/25911091

In all the recent hype on the “overprescribing” of psychiatric medications, there is a circulating rumor antidepressant use in the mother during pregnancy has could be linked to an autism diagnosis in the child. Thankfully, there is research on this topic, and the results are clear: antidepressant exposure during pregnancy does not cause autism in children. Where would this idea come from? Early studies did show a weak link, but the association arises because there is a genetic link between having a psychiatric disorder like anxiety and stress and autism. Don’t stop taking your meds unless you discuss it with your doctor. References below:

https://pubmed.ncbi.nlm.nih.gov/42134364

https://pubmed.ncbi.nlm.nih.gov/42088678/

https://pubmed.ncbi.nlm.nih.gov/42168841/

SPARK – neuroscience, known to autism researchers as the other “SPARK”, is a project based out of Stanford University. This project does not collect genetics on hundreds of thousands of people, instead, they that provide funding, advice, support, mentorship, coaching and project management to scientists who have some evidence of a target in the brain relevant to autism. They help these scientists turn it into a potential drug or therapeutic that can help families. This is known as “translational research” and part of the “Valley of Death” where so many good drugs fail. This is a high-risk/high-reward endeavor. They are currently focused on therapeutics that target the functioning of the brain in autism and Parkinson’s Disease. Today’s guest is Dr. Opher Kornfeld, managing director of SPARK NS and neuroscientist. He explains how SPARK NS started, what they do, and how they have been successful helping scientists develop an idea into a potential product.

https://sparkns.org

This week’s podcast summarizes some highlights in scientific research and includes a recognition of Rare Disease Week and actions taken by the FDA to ease the criteria for evaluating genetic therapies for rare genetic disorders, the best study to date on the mortality in autism, genetic prediction of outcome in individuals with a diagnosis, and Uta Frith’s commentary on the concept of “spectrum”.

https://pubmed.ncbi.nlm.nih.gov/41773580

https://pubmed.ncbi.nlm.nih.gov/41651809

https://pubmed.ncbi.nlm.nih.gov/41661606

https://archive.ph/fPscR

A landmark study that uses brain organoids from different people with different genes associated with autism showed that the different genes act as roads that go on different journeys to the same destination. This will be an enormously important discovery for identifying targets to treat different autism symptoms across different genetic causes of autism and understand the diversity of symptoms. Also, the new Interagency Autism Coordinating Committee was announced and there is not much breadth of perspectives.

https://www.nature.com/articles/s41586-025-10047-5

On this week’s podcast, we present new research summarizing how autism is part of a larger spectrum of neuropsychiatric disorders and issues. There are issues that people with autism experience that are not unique to autism; they are seen in people with ADHD, schizophrenia, bipolar disorder and depression. This is what is meant by “transdiagnostic”. These things include core autism features, co-morbid health problems, and can partially be explained by genetics. While autism is a unique condition, understanding how autism is placed in the wider spectrum of disorders and conditions will speed up discoveries in treatments and supports.

Click to access mentalizing-impairments-across-11-psychiatric-conditions-a-transdiagnostic-systematic-review-and-network-meta-analysis-of-tasks-with-static-illustrations.pdf

https://www.nature.com/articles/s41586-025-09820-3

https://pubmed.ncbi.nlm.nih.gov/41416939

https://pubmed.ncbi.nlm.nih.gov/41257798

This year was a VERY eventful year for autism. If you want to hear a highlight of the good news, the great science that was discovered and the ideas developed to help families with autism, listen to this podcast or read the summary here: https://autismsciencefoundation.org/2025-year-in-review/. In summary: more precise subtypes of autism have been discovered and validated using biological markers, explanation for sex differences, new precision medicines for those with known genetic causes of autism, and new research studying the effects of early intervention. It was a great year for science, even with all the challenges from DOGE.

This week, a new study suggests a causal link not between Tylenol, but to COVID, which can cause a fever. There is clearly more research needed, but the findings are consistent with research on the link between maternal illness and autism. Also, it’s well known that genetics plays a role in how symptoms of autism emerge and present. Can genetics also explain why some people are diagnosed later? What about cannabis exposure during pregnancy? Is it a factor in a later diagnosis? For more information, listen to this week’s ASF podcast.

https://pubmed.ncbi.nlm.nih.gov/41016606

https://www.nature.com/articles/s41586-025-09542-6

https://journals.sagepub.com/doi/10.1177/13623613251355257?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%20%200pubmed

https://journals.lww.com/greenjournal/abstract/9900/neurodevelopmental_outcomes_of_3_year_old_children.1392.aspx