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An update on why there are fewer autistic females compared to males

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This week, special podcast correspondent #MiaKotikovski summarizes new research on the increasing prevalence of autism, with a focus on females. While the number of diagnosed females is increasing faster than the number for males, females assigned at birth still are less likely to receive a diagnosis than males. Additional evidence points to females having more genetic mutations and lower cognitive ability, so the questions remain: Are there females with autism who are just not getting diagnosed despite having all the autism features? Why not? Does autism in females “look” the same as autism in males? What sets them apart? These articles are all featured in the year-end highlight of research, so this is the time to get a deep explanation of the latest in sex differences in #autism.

https://pubmed.ncbi.nlm.nih.gov/34563942

https://pubmed.ncbi.nlm.nih.gov/39334436

https://pubmed.ncbi.nlm.nih.gov/33966484

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Breakthrough for those with rare genetic disorders

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This week, more on genetics as an influence to an autism diagnosis with a twist: can genetics lead to a specific treatment for core symptoms – across the board? How do you measure such broad symptoms? Our Rett Syndrome family friends and colleagues developed a novel outcome measure to capture what was most important to them, and the FDA approved it for use in a clinical trial. Years later, a new drug was approved that led to a reduction in behaviors associated with Rett Syndrome. Autism can take a lesson from this. In addition, can the genetics of autism be explained by parents with similar phenotypes? This is called assortative mating. The answer is complex.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450502/pdf/fped-11-1229553.pdf

https://www.nature.com/articles/s41591-023-02398-1

https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/38877467

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The Transcription Factor Song

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Very rarely are scientists able to look at single genes within the brains of people across neuropsychiatric disorders and understand how the genes in each of these cells influence expression of proteins and interactions of different cells with each other. Recently, a collaboration called PsychENCODE released a series of papers that investigated what genes are expressed in what cells in autism in different situations, how cells that communicate interact with more support or glial cells, and what mechanisms are in place to identify ways in which the broad environment (chemicals, contextual factors, illness) may influence gene expression leading to disorders like autism, schizophrenia and bipolar disorder. This podcast summarizes these papers as they are related to autism – ore at least tries to.

https://www.psychencode.org/phase-ii

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Biology of profound and non-profound autism

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Scientists have spent a lot of time trying to understand the biology of autism, unfortunately in the past, scientific studies had everyone with autism lumped together in one group and there are so many differences between people with a diagnosis that any features of the diagnosis itself were hard to detect. In the past, researchers grouped those who are cognitively abled with those who have average or superior intellectual disability, those who are able to express themselves verbally with those who cannot, and those who need 24-hour care with those who can live independently. This week, researchers changed that pattern of lumping all the autisms together by using profound autism as a subgroup and as a way to determine differences across autism subgroups. Researchers at @UCSD examined the cell sizes and the brain sizes of individuals with profound autism and compared them to those with non-profound autism. They found the larger the brain cell, the larger the brain size in different areas, and the more profound the autism. There were differences between profound autism, non-profound autism and typically developing controls. This is just a first step in using different classifications of behavior to understand the neurobiology of ASD and link brain function to autism behaviors, leading to more specific support for those across the spectrum.

https://molecularautism.biomedcentral.com/articles/10.1186/s13229-024-00602-8#Sec26

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Research for the end of Autism Action Month

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In honor of the last week of Autism Awareness/Acceptance Month, we review two new scientific findings that call for more awareness and action, and less acceptance of the status quo. First: sex differences in autism are not well understood, and as it turns out, the influences on a diagnosis are different. Males have a higher rate of heritability compared to females. Second, those with rare genetic disorders have very few options for treatment, but a new study promises hope for more personalized approaches. The researchers use Timothy Syndrome as an example of how cells can start to function properly through a targeted approach which focuses on a small part of a gene. This is potentially life saving for individuals with this disorder.

https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/38630491/

https://www.nature.com/articles/s41586-024-07310-6

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The 2024 Day Of Learning Quickie

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Did you miss the ASF 2024 Day of Learning and can’t wait for the videos to be posted? This is a 17 minute brief summary of what was discussed, but unfortunately, with no visuals. Don’t just listen to the podcast, watch the videos when they are posted. Also included in this podcast is a shoutout to the Profound Autism Summit which brought together hundreds of advocates around those who need 24/7 care for their lives. The link to their advocacy page is here: https://www.votervoice.net/ProfoundAutism/campaigns/112917/respond

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The ASF Year End Review of Science

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Just three days before 2024, ASF provides a summary of the the highlights of scientific discoveries and how they have translated into tools families can use. They include ways to speed up diagnosis and reduce waitlists, study of the brains in females and clinical recommendations for helping autistic females at birth, evidence of better practices around intervention and supports, and a review of the numbers of people who have a diagnosis. It isn’t comprehensive and if something was missed, our apologies, but the summary is 20 minutes.

You can read the text here: https://autismsciencefoundation.org/2023-year-end-review/

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Contemplating “syndromic autism”

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The words “syndromic autism” have been used to describe individuals with autism who also have a rare genetic mutation. Is it time to change those words to something else? Scientists and clinicians Drs. Jacob Vorstman and Steve Scherer from the University of Toronto share recent data in understanding autism, the role of genetic testing in autism in predicting and treating other conditions that someone with autism may have, and why the words “syndromic autism” may need to be updated to describe a subgroup of autism.

https://pubmed.ncbi.nlm.nih.gov/37330697/

Below is the Figure 1 that Dr. Scherer refers to:

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Top reasons to study the autistic brain

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There are dozens of good reasons why scientists need to study the brains of people with autism. One is to understand what happens in the brain as people with autism get older and see how the brain changes over time. Another is to identify mechanisms of autism to help all neuroscientists figure out how the brain works. A third is improve medicine by determining what helps what people at what age. Scientists @UCDavis, @Penn and @UCLA examined the individual brain cells of people with autism to address these three questions, revealing that the autistic brain shows some similarities to brains of people with Alzheimer’s Disease. In addition, inflammation seen in the brain may be caused by too much activity of cells talking to each other. Studying the brains of people with autism is essential to better understanding and is made possible by families who are committed to research. www.autismbrainnet.org.

https://pubmed.ncbi.nlm.nih.gov/36862688/

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attention attention…this is the INSAR 2023 summary

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Last week in Stockholm, Sweden, 2200 researchers and scientists working to understand and help those on the spectrum, met to share their most recent findings and exchange ideas. What were the main takeaways as ASF saw them? We cover why some autistic people don’t want genetics to be studied, how to better engage families with IDD and who are non-speaking, females, adults, international studies and yes, diversity. The program book was released a day before the meeting and can be found here: https://cdn.ymaws.com/www.autism-insar.org/resource/resmgr/docs/annualmeeting/insar2023_program_book.pdf