Association between NEDD4L gene and sodium lithium countertransport
Xiaojing Zheng1, Alanna C Morrison, Eleanor Feingold
1Department of Human Genetics, University of Pittsburgh, Pennsylvania, USA.
American Journal of Hypertension
|November 20, 2010
Summary
Researchers identified NEDD4L as a key gene influencing sodium lithium countertransport (SLC), a hypertension indicator. Genetic variations in NEDD4L are linked to SLC activity, offering new insights into essential hypertension.
Area of Science:
- Genetics
- Cardiovascular Science
- Molecular Biology
Background:
- Sodium lithium countertransport (SLC) is a recognized intermediate phenotype for essential hypertension.
- Identifying genes associated with SLC is crucial for understanding hypertension's genetic basis.
Purpose of the Study:
- To identify candidate genes for SLC using a combined gene expression profiling and linkage analysis strategy.
- To investigate the association between candidate genes, SLC, and essential hypertension.
Main Methods:
- Gene expression profiling identified differentially expressed genes between high- and low-SLC groups.
- Overlapping candidate genes were identified by comparing expression data with SLC/hypertension linkage maps.
- Genetic association studies in the Rochester Family Heart Study (RFHS) assessed variations in candidate genes (NEDD4L) and their link to SLC and blood pressure.
Main Results:
- NEDD4L was identified as a positional and functional candidate gene for SLC.
- NEDD4L expression differences between high- and low-SLC groups were confirmed via RT-PCR.
- Four single-nucleotide polymorphisms (SNPs) and a specific haplotype (H2) in NEDD4L showed significant association with SLC activity (P ≤ 0.05, P = 0.006).
Conclusions:
- The combined gene expression and linkage analysis approach successfully identified NEDD4L as a candidate gene regulating SLC.
- Genetic variations within the NEDD4L gene are associated with variations in SLC activity, implicating it in essential hypertension.
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