Association and gene-gene interactions study of reelin signaling pathway related genes with autism in the Han Chinese population.
RELN pathway genes give no usable autism signal in Han Chinese kids, so keep your assessment toolbox clinical, not genetic.
01Research in Context
What this study did
The team looked at seven genes in the RELN signaling pathway. These genes help guide brain cell movement during early growth.
They tested 950 Han Chinese children. Half had autism, half did not.
The goal was to find gene variants or gene-gene mixes that tracked with an autism diagnosis.
What they found
No single gene variant was more common in the autism group.
No set of variants linked together showed a clear signal either.
A four-gene combo looked promising in cross-validation, but the link vanished after stricter math checks.
How this fits with other research
Van Houten et al. (1980) already warned that no single marker cleanly splits autism from other delays. The new gene data echo that lesson: one genetic red-flag does not exist either.
Dudley et al. (2019) showed LENA automated counts miss half of real speech in kids with autism. Both papers remind us to doubt easy single-score answers, whether from a cheek swab or a wrist recorder.
Nuebling et al. (2024) found real brainstem differences linked to core autism traits. Their imaging signals are strong, while the RELN gene signals here are flat. Biology can be found; it just may live downstream from these genes.
Why it matters
Stop telling families that a quick gene panel will confirm autism. Use full ADOS and developmental history instead. If you run research with Han Chinese families, do not bank on RELN markers for subgrouping. Save the blood stick for studies with stronger leads.
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02At a glance
03Original abstract
Autism is a neurodevelopmental disorder with unclear etiology. Reelin had been proposed to participate in the etiology of autism due to its important role in brain development. The goal of this study was to explore the association and gene-gene interactions of reelin signaling pathway related genes (RELN, VLDLR, LRP8, DAB1, FYN, and CDK5) with autism in Han Chinese population. Genotyping data of the six genes were obtained from a recent genome-wide association study performed in 430 autistic children who fulfilled the DSM-IV-TR criteria for autistic disorder, and 1,074 healthy controls. Single marker case-control association analysis and haplotype case-control association analysis were conducted after the data was screened. Multifactor dimensionality reduction (MDR) was applied to further test gene-gene interactions. Neither the single marker nor the haplotype association tests found any significant difference between the autistic group and the control group after permutation test of 1,000 rounds. The 4-locus MDR model (comprising rs6143734, rs1858782, rs634500, and rs1924267 which belong to RELN and DAB1) was determined to be the model with the highest cross-validation consistency (CVC) and testing balanced accuracy. The results indicate that an interaction between RELN and DAB1 may increase the risk of autism in the Han Chinese population. Furthermore, it can also be inferred that the involvement of RELN in the etiology of autism would occur through interaction with DAB1.
Autism research : official journal of the International Society for Autism Research, 2016 · doi:10.1002/aur.1540