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Published on: March 17, 2012
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Dietary-Derived Essential Nutrients and Amyotrophic Lateral Sclerosis: A Two-Sample Mendelian Randomization Study
Kailin Xia1,2,3, Yajun Wang1,2,3, Linjing Zhang1,2,3
1Department of Neurology, Peking University Third Hospital, Beijing 100191, China.
Nutrients
|March 10, 2022
Summary
Essential nutrients like vitamin D and E may protect against ALS, while linoleic acid might increase risk. This study used Mendelian randomization to explore causal links between nutrients and amyotrophic lateral sclerosis (ALS).
Area of Science:
- Nutritional Neuroscience
- Genetic Epidemiology
- Neurodegenerative Diseases
Background:
- The relationship between essential nutrients and amyotrophic lateral sclerosis (ALS) risk is complex and not fully understood.
- Previous observational studies suggest associations, but causal links remain unconfirmed.
- Investigating specific nutrients' roles is crucial for understanding ALS etiology and potential interventions.
Purpose of the Study:
- To determine the potential causal relationship between essential nutrients (amino acids, fatty acids, minerals, vitamins) and ALS risk.
- To utilize Mendelian randomization (MR) to assess genetic predispositions for nutrient levels and their impact on ALS.
- To identify specific nutrients that may act as risk factors or protective agents against ALS.
Main Methods:
- Employed Mendelian randomization (MR) analysis using large-scale European genome-wide association study (GWAS) summary data.
- Analyzed data from 27,205 ALS patients and 110,881 controls for ALS risk.
- Utilized inverse variance-weighted (IVW) and multiple sensitivity analyses (weighted median, simple median, MR-Egger, MR-PRESSO) for robust findings.
Main Results:
- Genetically predicted higher linoleic acid (LA) levels were causally associated with an increased risk of ALS (OR: 1.066).
- Vitamin D (OR: 0.899) and vitamin E (OR: 0.461) showed a protective, inverse association with ALS risk.
- No significant causal effects were found for essential amino acids or minerals on ALS risk.
Conclusions:
- Diet-derived circulating nutrients play a role in ALS risk.
- Vitamin D and vitamin E demonstrate a protective effect against developing ALS.
- Linoleic acid is identified as a potential risk factor for amyotrophic lateral sclerosis.
