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Association between SLC20A1 and sodium-lithium countertransport
Xiaojing Zheng1, Alanna C Morrison, Stephen T Turner
1Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA.
American Journal of Hypertension
|July 29, 2011
Summary
Genetic variations in SLC20A1 are linked to sodium-lithium countertransport (SLC) activity, a marker for essential hypertension. This study supports SLC20A1
Area of Science:
- Genetics
- Molecular Biology
- Cardiovascular Research
Background:
- Sodium-lithium countertransport (SLC) is a recognized premorbidity marker for essential hypertension.
- Previous research suggested SLC20A1 gene variations might influence SLC activity in erythrocytes and leukocytes.
- SLC20A1 encodes a sodium-dependent phosphate cotransporter crucial for mammalian plasma membranes.
Purpose of the Study:
- To investigate the relationship between SLC20A1 and SLC activity.
- To determine if SLC20A1 variations are associated with differences in SLC activity levels.
Main Methods:
- Gene expression profiling was used to compare SLC20A1 expression in individuals with high versus low SLC activity.
- Six tag single-nucleotide polymorphisms (tSNPs) in SLC20A1 were genotyped in 1,815 individuals from the Rochester Family Heart Study (RFHS).
- Genetic association analysis was performed using Sequential Oligogenic Linkage Analysis Routines (SOLAR).
Main Results:
- SLC20A1 expression levels were significantly higher in individuals with high SLC activity compared to those with low SLC activity.
- Four SLC20A1 SNPs showed significant association with SLC activity after adjusting for covariates (P ≤ 0.05).
- SNP rs4849091 demonstrated the strongest association (P = 0.001), remaining significant after multiple testing correction.
Conclusions:
- The study provides evidence that allelic variations in SLC20A1 are associated with SLC activity levels.
- These findings support the hypothesis that SLC20A1 plays a role in determining SLC activity.
- SLC20A1 is implicated as a genetic factor influencing a key marker of essential hypertension.
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