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AAP Grand Rounds 2:20-21 (1999) Genes, Salt and Blood PressureSource: Wong ZY, Stebbing M, Ellis JA, Lamantia A, Harrap SB. Genetic linkage of beta and gama subunits of epithelial sodium channel to systolic blood pressure. Lancet. 1999;353:12221225.[Medline]
Two hundred and eighty-six Caucasian families from Victoria, Australia, comprised of both parents and two natural children (ages 1830 including 32 dizygotic twin pairs) were genotyped at chromosome 16p12. Genomic DNA was analyzed for genes on chromosome 16p12 which code for the beta and gamma subunits of two epithelial sodium channels, SCNNIB and SCNNIG respectively. These genes previously have been shown to be linked with sodium dependent forms of low and high blood pressure. Systolic blood pressure is influenced by pulse pressure which, in turn, reflects left-ventricular stroke volume, the compliance of larger arteries, and reflected pulse waves.
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