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The role of lipid peroxidation in individuals with autism spectrum disorders

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Abstract

The role of malondialdehyde-modified low-density lipoprotein (MDA-LDL), an oxidized LDL, in the pathophysiology of autism spectrum disorder (ASD) is unclear. We studied association between MDA-LDL and behavioral symptoms in 11 individuals with ASD and 7 age -matched normal controls. Behavioral symptoms were assessed using the Aberrant Behavior Checklists (ABC). Because small sample size in this study, three measures were conducted: first, employment of adaptive Lasso for enhancing the accuracy of prediction and interpretability; second, calculation of coefficient of variation for an appropriate selection of plasma variables; and third, selection of good candidates of plasma variables. Plasma levels of MDA-LDL, eicosapentaenoic acid, docosahexaenoic acid (DHA) and DHA/arachidonic acid ratios were significantly higher, while plasma superoxide dismutase (SOD) levels were significantly lower in the ASD group than in the control group. The total ABC scores were significantly higher in the ASD group than in the control group. Multiple linear regression analysis and the adaptive Lasso revealed association of increased plasma DHA levels with the ABC total scores and increased plasma MDA-LDL levels. Such association between DHA and plasma MDA-LDL levels may contribute to behavior in individuals with ASD.

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Funding

This study was funded by a Grant-in-Aid for Scientific Research (C) (2014–2016; No 26461777) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Correspondence to Kunio Yui.

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Conflict of interest

The authors have no conflict of interests concerning the materials or methods used in the present study or findings presented in this study.

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Informed consent was obtained by all participants in this study. This study was performed with the approval of the Ethics Committee of the Fujimoto Medical Clinic in Kobe City, Japan. Written informed consent was obtained from the patients or their parents.

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All authors adhere to the guidelines for authorship that are applicable in their specific research field and the following guidelines:

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    Kunio Yui developed the study project.

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    All authors whose names appear on the submission.

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    Kunio Yui, George Imataka and Hitomi Sasaki made substantial contributions to the conception, design of the work, the acquisition, analysis, or interpretation of data; Hitomi Sasaki and or Ryoichi Shiroki reviewed the paper. All authors drafted the work or revised it critically for important intellectual content and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

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Yui, K., Imataka, G., Sasaki, H. et al. The role of lipid peroxidation in individuals with autism spectrum disorders. Metab Brain Dis 35, 1101–1108 (2020). https://doi.org/10.1007/s11011-020-00585-4

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  • DOI: https://doi.org/10.1007/s11011-020-00585-4

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