Severity of Autism Spectrum Disorder Symptoms Associated with de novo Variants and Pregnancy-Induced Hypertension.
Autistic children with new gene changes plus mom’s pregnancy hypertension often show higher IQ, more repetitive behaviors, and fewer social issues.
01Research in Context
What this study did
The team looked at kids with autism who also carry brand-new gene changes. These changes are called de novo variants. They asked whether mom’s high blood pressure during pregnancy changed how autism looked in these kids.
They split the children into two groups: those with the new gene changes and those without. Then they compared kids whose moms had pregnancy hypertension in each group.
What they found
Kids who had both the new gene changes and mom’s hypertension showed a special mix. They had higher thinking and daily-living scores, yet more repetitive motions. Surprisingly, they had fewer social problems.
In children without the new gene changes, mom’s hypertension made no difference. Only the combo mattered.
How this fits with other research
McConkey et al. (2010) also linked pregnancy blood-pressure trouble to autism, but they saw higher autism risk for everyone. The new study says the risk only shows up when the child already has new gene changes. The older paper looked at the whole hospital birth list; this one zoomed in on a genetic subgroup.
Peristeri et al. (2024) tracked IQ in preschoolers with autism and found wildly different paths. Their work supports the idea that autism plus genes can still mean rising scores, just like Xiaomeng’s combo group.
Reus et al. (2013) warned that ADHD can inflate parent-reported autism scores. Here, the inflation is real, but it is driven by genes plus mom’s blood pressure, not ADHD.
Why it matters
When you see a bright child with autism who flaps or lines up toys, check the prenatal history. Ask if mom had high blood pressure. If the answer is yes and genetic testing shows de novo variants, plan for strong daily-living goals and extra structure for repetitive play. Do not assume low IQ; expect a unique profile that needs tailored teaching.
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Join Free →Flip to the pregnancy history in the file; if hypertension is noted and genetics show de novo variants, raise adaptive goals and add repetitive-play interventions.
02At a glance
03Original abstract
Genetic factors, particularly, de novo variants (DNV), and an environment factor, exposure to pregnancy-induced hypertension (PIH), were reported to be associated with risk of autism spectrum disorder (ASD); however, how they jointly affect the severity of ASD symptom is unclear. We assessed the severity of core ASD symptoms affected by functional de novo variants or PIH. We selected phenotype data from Simon's Simplex Collection database, used genotypes from previous studies, and created linear regression models. We found that ASD patients carrying DNV with PIH exposure had increased adaptive and cognitive ability, decreased social problems, and enhanced repetitive behaviors; however, there was no difference in patients without DNV between those with or without PIH exposure. In addition, the DNV genes carried by patients exposed to PIH were enriched in ubiquitin-dependent proteolytic processes, highlighting how candidate genes in pathways and environments interact. The results indicate the joint contribution of DNV and PIH to ASD.
Journal of autism and developmental disorders, 2024 · doi:10.1007/s10803-022-05824-4