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Published on: January 26, 2024
Genetic Risk Factors Associated With Preeclampsia and Hypertensive Disorders of Pregnancy
Jaakko S Tyrmi1,2,3, Tea Kaartokallio4, A Inkeri Lokki4,5
1Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
This genome-wide association study identified novel genetic loci for preeclampsia, revealing links to blood pressure regulation and pregnancy maintenance genes. Findings advance understanding of preeclampsia susceptibility.
Area of Science:
- Genetics
- Obstetrics
- Cardiovascular Research
Background:
- Preeclampsia susceptibility has a genetic basis, but the specific genetic architecture remains incompletely understood.
- Identifying genetic factors is crucial for understanding the pathophysiology of hypertensive disorders of pregnancy.
Purpose of the Study:
- To elucidate the genetic architecture of preeclampsia and related hypertensive disorders of pregnancy.
- To identify novel genetic variants associated with preeclampsia using a genome-wide association study (GWAS).
Main Methods:
- Conducted a large-scale GWAS meta-analysis combining data from multiple cohorts (FINNPEC, FinnGen, Estonian Biobank, InterPregGen).
- Analyzed two phenotypes: preeclampsia and a combined phenotype of preeclampsia or other maternal hypertension during pregnancy.
- Examined associations between genome-wide genetic variants and clinical risk factors.
Main Results:
- Identified 19 genome-wide significant associations for preeclampsia and related conditions, with 13 being novel.
- Discovered novel risk loci near genes involved in blood pressure regulation, placental development, uterine artery remodeling, and kidney function.
- Found genetic correlations between preeclampsia phenotypes and blood pressure traits.
Conclusions:
- Genes associated with blood pressure traits play a role in preeclampsia, often with pleiotropic effects on other functions.
- Several novel loci harbor genes critical for successful pregnancy maintenance, suggesting their dysfunction contributes to preeclampsia.
- These findings provide new insights into the genetic underpinnings of preeclampsia and its diverse biological pathways.
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