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  • Title: SA gene and blood pressure cosegregation using Dahl salt-sensitive rats.
    Author: Harris EL, Dene H, Rapp JP.
    Journal: Am J Hypertens; 1993 Apr; 6(4):330-4. PubMed ID: 8507454.
    Abstract:
    Based on the published cDNA base sequence for the (anonymous) SA gene, a polymerase-chain-reaction (PCR) product from the SA gene was obtained from a Dahl salt-sensitive rat kidney cDNA library. Compared to the published sequence, this product had a 102 base pair insert in the 3' end of the cDNA, probably as the result of alternate mRNA splicing. A StuI restriction fragment length polymorphism detected three alleles among various rat strains using this PCR SA gene probe. Alleles at the SA locus strongly cosegregated with blood pressure (P = .0012) in a salt-fed F2 population derived from crossing Dahl S and Lewis rats. In contrast, a cosegregation analysis of blood pressure and SA alleles in salt-fed F2 rats derived from a Dahl S x Wistar-Kyoto cross gave a negative cosegregation result. It is concluded that in certain genetic backgrounds the SA gene (or a closely linked gene) can contribute a significant component of genetic hypertension.
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