Posted on

From being high to being aggressive

Podcast: Play in new window | Download

Subscribe: RSS

There are many many potential factors that influence a diagnosis of ASD that have been underexplored, and recreational drugs are one of them. Of course it would never explain all the cases of ASD, not one singular thing does, but does cannabis consumption during pregnancy lead to an increased probability of having a child with ASD? As it turns out, yes, a small increase, meaning it isn’t the only thing causing ASD but: JUST SAY NO if you are pregnant. On the other end of the spectrum is aggression, a completely horrible feature of some people with ASD. About 30% of people who are aggressive and have an ASD diagnosis are not responsive to any medications or therapies, which is horrifying. Researchers in Canada and Brazil have studied the brains of this group, with what is called “refractory aggression” to try to get to the mechanism.

https://pubmed.ncbi.nlm.nih.gov/32778828/

https://pubmed.ncbi.nlm.nih.gov/32762791/

Posted on

The autism brain at 3 months old

Podcast: Play in new window | Download

Subscribe: RSS

Biological features of ASD can be seen long before behavioral impairments in children are seen. Researchers are now studying the activity of the brain at 3 months in infants that go on to develop autism and those that do not. There are distinct features in the brain seen in a 3 month old that goes on to develop ASD. In addition, excessive brain activity resulting in seizures can increase the probability of a later ASD diagnosis in infants with a rare genetic disorder called Tuberous Sclerosis. This podcast will explain how connectivity and activity in a 3 month old can influence a later diagnosis. What we don’t know more about is those intervening months, and what can be done to mitigate symptoms.

https://www.sciencedirect.com/science/article/abs/pii/S2451902220301403?via%3Dihub

https://onlinelibrary.wiley.com/doi/epdf/10.1002/acn3.51128

Posted on

Guys, we all need exercise

Podcast: Play in new window | Download

Subscribe: RSS

People with autism are less likely to be physically active and more likely to be sedentary.    A number of studies have looked into different physical activities, both group based and individually, on improvements in health as well as core features of autism, and most have had positive results.  New animal model research demonstrates a benefit of exercise using the maternal immune activation model of ASD, pruning back the excess of connections and cell fibers.  As people with autism also have too many connections in the brain, this may have a direct therapeutic benefit.  But besides all the scientific conjecture, we all need more exercise, physical activity interventions seem to only help, not hurt, people across the spectrum, and should be used to complement, not replace existing therapies.

 

 

https://www.ncbi.nlm.nih.gov/pubmed/29693781

 

https://www.ncbi.nlm.nih.gov/pubmed/31102193

 

https://link.springer.com/article/10.1007%2Fs10803-019-04050-9

 

https://www.cell.com/cell-reports/retrieve/pii/S2211124719306266?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2211124719306266%3Fshowall%3Dtrue

Posted on

Yeah, another study about autistic poop

Podcast: Play in new window | Download

Subscribe: RSS

This week’s podcast includes a summary of the new study, this time in an animal model, looking at microbiome transplantation.  Because this was more of an experimental model, the researchers could be more rigorous in their design and look at things like behavior, brain activity, and specific biological pathways.  While a mouse does not have autism, transplantation of the autism microbiome resulted in autistic-like behaviors.   Second, a hopeful message of the value of participating in research on outcomes – those infants that were tracked prospectively showed improved outcomes later on, suggesting that all of the extra attention they get leads to a reduction in symptoms and an improvement in adaptive behavior.  Even if you do not have a family history of autism – participate in research.  It’s good for your child, and it’s good for other people’s children.

 

https://www.cell.com/cell/fulltext/S0092-8674(19)30502-1 

https://www.ncbi.nlm.nih.gov/pubmed/31032937

 

 

 

 

Posted on

An update on females with autism, on the double

Podcast: Play in new window | Download

Subscribe: RSS

Females with autism are different than males with autism in a lot of ways.  This week, researchers used twins to examine the differences between males and females with autism in their brain structure and how it’s associated with autism traits, not a diagnosis.  To do this, researchers in Sweden turned to twins.  As it turns out, females have more of a diversity of differences in brain changes compared to boys, supporting the female protective effect.  But how to females with autism feel?  As them!  A group in the UK interviewed over 20 women on the spectrum or their parents to find out what concerns them most and what they find most challenging.

Both articles cited this week are open access:

https://link.springer.com/article/10.1007%2Fs10803-019-03906-4     https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6373677/

 

Posted on

Autism spectrum disorders underneath a bigger umbrella: more data from the brain

Podcast: Play in new window | Download

Subscribe: RSS

There is demonstrated genetic overlap between many neurodevelopment disorders including  ASD, ADHD, and schizophrenia, and now there is data showing similarities in the structure and size of the brains in people with autism and those with ADHD.  These differences depend on how severe social difficulties are, but the similarities are seen with ASD and ADHD, but not OCD.   In addition, this week there are new depressing results from the Interactive Autism Network on unemployment and females with ASD.  The results may not surprise you, but they will upset you.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361977/

https://www.ncbi.nlm.nih.gov/pubmed/30729799

 

 

Posted on

Genes and Environment, Genes and Environment. Go together like aging and retirement.

Podcast: Play in new window | Download

Subscribe: RSS

Twins with autism, where either one or both is diagnosed, is crucial to understand the role of genetics and the environment to both autism diagnoses and now, autism traits.  In a study this week, researchers using data from the California Twins Study examined the genetic and environmental influences of brain development in multiple regions and measures.  While estimates of genetic and environmental influences can only be modeled in twins, they can be experimentally tested in animal models.  Researchers at the University of Washington investigate what causes the link between air pollution in humans and autism by studying diesel fuel exhaust in pregnant mice.  Finally, across all of these disparate animal studies – does anything pull them together.  Are these models all one-offs or do they have anything in common?  It turns out disruption in normal brain activity is one thing that they have in common, and something that is at the common core of ASD neurobiology.

 

https://www.ncbi.nlm.nih.gov/pubmed/30659287

https://www.ncbi.nlm.nih.gov/pubmed/30668980

https://www.ncbi.nlm.nih.gov/pubmed/30679017

 

Posted on

Understanding the hard to research

Podcast: Play in new window | Download

Subscribe: RSS

What do Princess Kate and Amy Schumer have in common, and what does it have to do with autism?  The answer:  Hyperemesis Gravidum.  It’s linked to autism, but not strongly, but it does show more evidence of significant overlap between many neuropsychiatric issues and disorders.

More importantly though, those with low verbal ability and low cognitive function are harder to study than most people with autism.  Two new research studies documented what they had to do to make studies in this population possible, and how this group was different from those with average IQ and some words.  One looked at brain structure, and the other was a treatment for minimally verbal girls with autism.

The HG study:  https://www.ncbi.nlm.nih.gov/pubmed/30594672

The minimally verbal girls study https://www.ncbi.nlm.nih.gov/pubmed/30607780 

The imaging study:  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6307191/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6307191/

Posted on

Nobody puts babies in a corner

Podcast: Play in new window | Download

Subscribe: RSS

Nobody can dispute that research to better understand autistic adolescents and adults is lacking.  However, scientists continue to make important scientific discoveries in infants and toddlers with autism.  These infants and toddlers eventually become adolescents and adults, so identifying critical periods of brain development that influences behavior, what to say to parents and when, and how to  engage the entire community to better serve infants and toddlers is still needed.  This week is an update on the activities of the Baby Siblings Research Consortium (BSRC), including a paper that ties in activity of different brain regions at 1 year olds, to stereotyped behaviors and insistence on sameness in 2 year olds.  The research of the BSRC is directly applicable to families affected by autism at all ages.

 

https://www.ncbi.nlm.nih.gov/pubmed/30446435

Posted on

The waterbed around your brain (and its role in sleep)

Podcast: Play in new window | Download

Subscribe: RSS

This week we have a very special guest:  Dr. Mark Shen from University of North Carolina at Chapel Hill, who has been leading the field in understanding the role that the fluid around the brain in autism.  This week he expands his research to show that this increase in extra – axial (around the brain) fluid is not limited to those with a family history of autism, and is seen both before and after a diagnosis.  This has implications for early detection of ASD, but more interesting, it may help explain why some people with autism have so many sleep issues.