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Updated: May 27, 2025
12:08
Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
Published on: May 22, 2013
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Causality between Autism Spectrum Disorder and Telomere Length.
Tianyu Jin1,2, Ruiyao Yang3, Yifan Cheng1
1Center for Rehabilitation Medicine, Department of Neurology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, China.
Brain and Behavior
|February 20, 2025
Summary
Individuals with autism spectrum disorder (ASD) have shorter telomere length (TL). However, shorter TL does not appear to increase the risk of developing ASD, according to this Mendelian randomization study.
Area of Science:
- Genetics
- Neurodevelopmental Disorders
- Biomarkers
Background:
- The relationship between telomere length (TL) and autism spectrum disorder (ASD) is debated.
- Previous observational studies offer inconclusive evidence on this association.
Purpose of the Study:
- To investigate the causal relationship between TL and ASD.
- Utilize bidirectional Mendelian randomization (MR) for robust analysis.
Main Methods:
- Employed large-scale genome-wide association studies (GWAS) summary statistics for TL (n=472,174) and ASD (n=46,351).
- Primary analysis used the inverse-variance weighted (IVW) method, supported by MR-Egger, weighted median (WM), and MR-PRESSO.
- Conducted comprehensive sensitivity analyses including Cochran's Q test and MR-PRESSO outlier detection.
Main Results:
- A significant association was found between ASD and shorter TL (IVW: OR=0.98, p=0.03).
- Reverse MR analysis showed no significant causal effect of shorter TL on ASD risk (IVW: OR=1.06, p=0.35).
- Sensitivity analyses confirmed the robustness of the primary findings.
Conclusions:
- Individuals with ASD exhibit shorter telomere length.
- Shorter telomere length is not causally linked to an increased risk of developing ASD.
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