Is autism a yes/no diagnosis?

This week’s podcast highlights a paper from the IBIS (infant brain imaging study) that tracks infants from 6 months to 5 years of age to examine how ASD symptoms cluster together. These infants either have a diagnosis or they don’t, or they have something which doesn’t meet diagnostic threshold but is still impairing in some way. Ignoring the actual diagnosis, if the data is clustered together around how symptoms present, what happens? What does that mean for some of the longest standing research findings in ASD? For example, using this new approach which ignores and actual diagnosis, are more males are diagnosed than females? As it turns out, it equals out these ratios. What does this mean? Listen to this week’s podcast to hear directly from the first author, Catherine Burrows!

https://www.sciencedirect.com/science/article/abs/pii/S0006322322013130?casa_token=ZFZpvnUOIBkAAAAA:G667QIkX_Vd6JPeWvIPABo1FPrdNL_3IiW-ajy7xR2Nme_I4ztOEf2xJ4FyhGHTMgrb8Lqq6Og

A 2022 Day of Learning Quickie

This year’s Day of Learning was a huge success, with topics ranging from biological sex differences to mobile technologies all the way to the importance and documented value of leisure activities in people on the spectrum. the speakers included a discussion of the IACC, sex differences, the value of prevalence data, mobile technologies, leisure activities, and a recognition of two advocates who made or make a difference in families: Samantha Els and Suzanne Wright. Listen to this week’s podcast for a quickie, but don’t let it prevent you from watching the longer videos, a link to which can be found below

www.babynavigator.com

www.autismnavigator.com

Passing as Non-Autistic

You may know this as “masking” or “camouflaging” where autistic adults intentionally or unintentionally hide their autistic features to pass as non-autistic because they want to hide some of their challenges. This week, Drs. Erin Libsack and Matthew Lerner from Stony Brook University summarize a systematic review on this behavior. The original goal was to develop their own studies, but as it turns out, there are still so many unanswered questions to deal with that were unearthed from this systematic review.

https://pubmed.ncbi.nlm.nih.gov/34505231/

Ribbit…Ribbit… frogs are the new mouse of ASD research

You’ve heard a lot about CRISPR technology to manipulate gene expression. But what have scientists actually learned? Well, the cells in which DNA is manipulated could come from different animal models, including frogs and mice. These model systems are used to track brain development, sex differences, and the downstream effects of convergence of genetic manipulations of autism relevant genes on brain cells. They can be used, as one study demonstrated, to examine protective or resilience factors in the brain. This week we talk to Helen Willsey, PhD, at UCSF to hear about her research about manipulating genes in frog eggs and what it says about the female protective effect.

https://pubmed.ncbi.nlm.nih.gov/33497602/

https://pubmed.ncbi.nlm.nih.gov/33243861/

More ASD links with hormones that are not well-known but are now shown

Oxytocin treatment for social communication in ASD has been recntlyused by doctors, but mostly used by people using it on their own through a nasal spray. Unfortunately, it doesn’t have a huge, if any, effect in randomized clinical trials. This week’s podcast investigates current research in both the oxytocin and vasopressin system in ASD, when changes start, and how oxytocin administration has different effects in autistic women vs. neurotypical women. Once again, clinicians can not assume that what works in people without ASD will work in those with a diagnosis.

https://www.ncbi.nlm.nih.gov/pubmed/32341146

https://www.ncbi.nlm.nih.gov/pubmed/32188502

ASD in the “next generation” of siblings

Times have changed. Once, parents of a child with autism were concerned about autism in younger siblings. Now those parents are grandparents, and worried about autism in their children’s children. Siblings of autistic adults are considering having children of their own and wondering what they should be prepared for when they have kids of their own. This week, Natasha Marrus from Washington University School of Medicine talks about her new study looking at the increase in probability of ASD in infants who have an aunt or an uncle with ASD. The results are not surprising, but they do have implications for actionable steps.

https://www.sciencedirect.com/science/article/pii/S0006322320313846?via%3Dihub

This one’s for the girls

In this week’s podcast, I semi-plagiarize from a recent summary of sex differences in ASD, written by Drs. Meng-Chuan Lai and Peter Szatmari from the University of Toronto.  They delve into why more males are diagnosed with females, and differences in the presentation of those features of ASD that differ between males and females.  These include camouflaging, differences in language style, differences based on behaviors determined by sex, and associated features like anxiety and internalizing behaviors.  Thank you to the authors for putting together the information in a way that makes sense.

https://www.ncbi.nlm.nih.gov/pubmed/31815760

https://www.ncbi.nlm.nih.gov/pubmed/30962869

Genes genes all in an order, the ones you have, the greater risk of disorder

This week, a special focus on genetics:  what type, where do they come from, what do these genes do and how do they influence risk of a wide array of psychiatric issues including autism.  The results come from the largest study to date of people with autism as well as those with ADHD, bipolar disorder and schizophrenia.  It’s also the largest study of the Female Protective Effect so far.  Even if genetics does not explain everything about ASD, genetics is important and you deserve to know why.  Below is a graphical abstract of what they found:

 

 

https://www.cell.com/action/showPdf?pii=S0092-8674%2819%2931398-4

https://www.ncbi.nlm.nih.gov/pubmed/31835028

 

Happy Pride all!

This week’s podcast is dedicated to the “T” in LGBTQ –  trans.  Several studies over the past few years have linked higher rates of gender variance in people with autism and higher rates of autism traits in those who are trans.  Why?  Are they biologically or psychologically linked or both?  This is important for understanding, not treatment or intervention.  This week’s podcast celebrates trans people who are also autistic.

https://www.ncbi.nlm.nih.gov/pubmed/30547258

https://www.ncbi.nlm.nih.gov/pubmed/29752630

https://www.ncbi.nlm.nih.gov/pubmed/30920347

https://www.ncbi.nlm.nih.gov/pubmed/23864402

Are animal models for ASD a monkey wrench or useful tool?

A new animal model of autism appeared this week:  the monkey.  This adds to the ever growing list of different model systems from autism, from fruit flies to mice and rats now up to monkeys.  Are these animal models useful and for what, and why isn’t there just ONE model of autism rather than the dozen that exist?  This week’s podcast discusses research from scientists at the UC Davis MIND Institute and what they are doing to improve these models of ASD.

https://www.spectrumnews.org/features/multimedia/webinars/webinar-jill-silverman-makes-case-rat-models-autism/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5810939/pdf/nihms906435.pdf

http://news.mit.edu/2019/gene-editing-autism-model-0612