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  • Title: Nonlinear relationship between erythrocyte sodium-lithium countertransport and blood pressure in man.
    Author: Petrov VV, Britov AN, Levitsky DO, Minchenko BI, Konstantinov EN, Svidersky VD, Novikov ID, Grishenkov EA, Lijnen PJ.
    Journal: Methods Find Exp Clin Pharmacol; 1994 Nov; 16(9):661-6. PubMed ID: 7746028.
    Abstract:
    A relationship between erythrocyte Na+/Li(+)-countertransport activity and blood pressure was studied in a randomly selected sample (95 subjects) with full range of blood pressure, from a representative group of inhabitants of one of Moscow's districts. The mean rate of erythrocyte Na+/Li(+)- countertransport activity was higher (p < 0.01 or less) in the groups of subjects with both borderline (BH) and moderate essential hypertension (EH) as compared with the group of normotensives (NT). A positive correlation was found between the erythrocyte Na+/Li(+)- countertransport rate and age and body weight in the entire selected group. The total contribution of these confounding parameters is responsible for 20.4% of the interindividual variability of the Na+/Li(+)- countertransport activity. The individual Na+/Li(+)- countertransport values remained unchanged during at least 2 years of follow-up. A nonlinear relationship between erythrocyte Na+/Li(+)- countertransport activity and blood pressure was established in the entire group. No significant association between blood pressure and Na+/Li(+)- countertransport was seen at high and low values of these two parameters. A pronounced change in the erythrocyte Na+/Li(+)- countertransport values occurred within a narrow borderline blood pressure range.
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