Homocysteine and female fertility, pregnancy loss and offspring birthweight:a two-sample Mendelian randomization study
| Autor: | Alisa D. Kjaergaard, Mathias N. Kjaergaard, Wai-Kit Ming, Zillian Wang, Christina Ellervik, Yanxin Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
0301 basic medicine
Male Homocysteine Offspring media_common.quotation_subject Medicine (miscellaneous) Physiology Renal function 030209 endocrinology & metabolism Fertility 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Folic Acid Pregnancy Diabetes mellitus Mendelian randomization Medicine Birth Weight Humans Methylenetetrahydrofolate Reductase (NADPH2) media_common 030109 nutrition & dietetics Nutrition and Dietetics biology business.industry Mendelian Randomization Analysis medicine.disease Abortion Spontaneous chemistry Methylenetetrahydrofolate reductase biology.protein Female business Genome-Wide Association Study |
| Zdroj: | Kjaergaard, A D, Wu, Y, Ming, W-K, Wang, Z, Kjaergaard, M N & Ellervik, C 2022, ' Homocysteine and female fertility, pregnancy loss and offspring birthweight : a two-sample Mendelian randomization study ', European Journal of Clinical Nutrition, vol. 76, no. 1, pp. 40-47 . https://doi.org/10.1038/s41430-021-00898-2 |
| DOI: | 10.1038/s41430-021-00898-2 |
| Popis: | BACKGROUND/OBJECTIVES: Observational studies link elevated homocysteine concentrations (Hcy) with female fertility, pregnancy loss, and low offspring birthweight. Maternal rs1801133, a functional variant in MTHFR strongly associated with lifelong elevated Hcy, is associated with recurrent pregnancy loss and offspring birthweight in Asian women. We investigated if genetically elevated Hcy is associated with fertility, pregnancy loss, and offspring birthweight in European women.SUBJECTS/METHODS: We performed a two-sample Mendelian randomization (MR) study using publicly available data. We obtained 18 genetic variants (five involved in Hcy metabolism) explaining up to 5.9% of the variance in Hcy from a genome-wide association meta-analysis of 44,147 European individuals (82% women). We investigated fertility (including age at menopause), pregnancy loss, and offspring birthweight in the UK Biobank (N = 194,174), EGG (N = 190,406), and ReproGen (N = 69,360-252,514) consortia using summary statistics. We calculated inverse-variance weighted, and several sensitivity MR regression statistics.RESULTS: rs1801133 was associated with a 7.45 months (95% CI: 4.09, 10.80) increase in age at menopause and 29.69 (12.87, 46.51) g decrease in offspring birthweight per SD increase in Hcy in the UK biobank, and confirmed in EGG and ReproGen. MR for Hcy metabolism alone (five variants in MTHFR, MTR, CBS) showed similar results for offspring birthweight across consortia. However, using all 18 variants resulted in no association for any of the outcomes across consortia.CONCLUSION: Hcy and suggestively vitamin B variants are most likely the drug targets for folate supplementation in pregnant women on the offspring birthweight, while Hcy variants related to renal function or diabetes are not involved. |
| Databáze: | OpenAIRE |
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