Parameters of lymphocyte Na+-Ca2+ regulation and blood pressure: the gender effect.
HYPERTENSION(1998)
Abstract
Alterations in cellular Ca2+ and Na+ regulation play a role in the pathogenesis of essential hypertension. Using peripheral lymphocytes from 68 normal persons, we observed the following relationships for major cellular Ca2+ regulatory parameters. Among men and women, Na+-Ca2+ exchanger activity was positively correlated with the resting cytosolic free Ca2+ ([Ca2+](c)) (r=0.43, P=0.0003), and the resting [Ca2+](c) was positively correlated with cytosolic Na+ ([Na+](c)) (r=0.50, P=0.0001). For men only, store-operated Ca2+ entry was positively correlated with Na+-Ca2+ exchanger activity (r=0.63, P=0.0001), In addition, systolic and diastolic blood pressures were positively correlated with [Na+](c) in men (r=0.53, P=0.001, and r=0.41, P=0.017, respectively) but not in women (r=0.30, P=0.088, and r=0.24, P=0.17, respectively). Some of the relationships between cellular and blood pressure parameters were confounded by serum triglycerides. These observations indicate a gender effect on cellular Ca2+-Na+ regulation and its relationship with blood pressure.
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Key words
hypertension, essential,sodium,calcium,gender,blacks,ethnicity
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