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Relations between magnesium, calcium, and plasma renin activity in black and white hypertensive patients.
Miner Electrolyte Metab 1995; 21(6):417-22ME

Abstract

The heterogeneous status of magnesium and calcium metabolism in the hypertensive population may be related to the plasma renin activity (PRA). This study investigates the relationships between serum and erythrocyte magnesium (Mg2+) and calcium (Ca2+) concentrations and PRA in black and white essential hypertensive patients. Thirty-nine normotensive (20 black, 19 white) and 47 hypertensive (25 black, 22 white) subjects were studied. The PRA was measured by radioimmunoassay, Mg2+ and Ca2+ by atomic absorption spectroscopy, and serum ionized Ca2+ by a specific electrode. PRA and ionized Ca2+ were significantly lower in the black hypertensive as compared with the white hypertensive group (1.99 +/- 0.33 vs. 5.96 +/- 1.02 ng/ml/h for PRA; 1.28 +/- 0.07 vs. 1.42 +/- 0.01 mmol/l for ionized Ca2+: black hypertensives vs. white hypertensives p < 0.05). Ionized Ca2+ was significantly increased (p < 0.05) in the white hypertensive patients as compared with the normotensive controls (1.42 +/- 0.01 vs. 1.29 +/- 0.04 mmol/l). In the black hypertensive group, serum and erythrocyte Mg2+ were significantly (p < 0.05) decreased as compared with the other groups. The erythrocyte Ca2+ concentration was significantly elevated in both black and white hypertensive patients. In the group as a whole, serum Mg2+ and PRA were negatively correlated and ionized Ca2+ and PRA and ionized Ca2+ and erythrocyte Ca2+ positively correlated. However, in the subgroups, these correlations were only significant in the white group: r = -0.67 and p < 0.05 serum Mg2+ vs. PRA; r = 0.64, and p < 0.05 ionized Ca2+ vs. PRA; r = 0.82 and p < 0.01 ionized [Ca2+]i vs. erythrocyte Ca2+. These data suggest a relationship between PRA, Mg2+, and Ca2+ which may be more important in white than in black hypertensive patients.

Authors+Show Affiliations

Department of Medicine, University of the Witwatersrand, Johannesburg, South Africa.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8592486

Citation

Touyz, R M., et al. "Relations Between Magnesium, Calcium, and Plasma Renin Activity in Black and White Hypertensive Patients." Mineral and Electrolyte Metabolism, vol. 21, no. 6, 1995, pp. 417-22.
Touyz RM, Panz V, Milne FJ. Relations between magnesium, calcium, and plasma renin activity in black and white hypertensive patients. Miner Electrolyte Metab. 1995;21(6):417-22.
Touyz, R. M., Panz, V., & Milne, F. J. (1995). Relations between magnesium, calcium, and plasma renin activity in black and white hypertensive patients. Mineral and Electrolyte Metabolism, 21(6), pp. 417-22.
Touyz RM, Panz V, Milne FJ. Relations Between Magnesium, Calcium, and Plasma Renin Activity in Black and White Hypertensive Patients. Miner Electrolyte Metab. 1995;21(6):417-22. PubMed PMID: 8592486.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Relations between magnesium, calcium, and plasma renin activity in black and white hypertensive patients. AU - Touyz,R M, AU - Panz,V, AU - Milne,F J, PY - 1995/1/1/pubmed PY - 1995/1/1/medline PY - 1995/1/1/entrez SP - 417 EP - 22 JF - Mineral and electrolyte metabolism JO - Miner Electrolyte Metab VL - 21 IS - 6 N2 - The heterogeneous status of magnesium and calcium metabolism in the hypertensive population may be related to the plasma renin activity (PRA). This study investigates the relationships between serum and erythrocyte magnesium (Mg2+) and calcium (Ca2+) concentrations and PRA in black and white essential hypertensive patients. Thirty-nine normotensive (20 black, 19 white) and 47 hypertensive (25 black, 22 white) subjects were studied. The PRA was measured by radioimmunoassay, Mg2+ and Ca2+ by atomic absorption spectroscopy, and serum ionized Ca2+ by a specific electrode. PRA and ionized Ca2+ were significantly lower in the black hypertensive as compared with the white hypertensive group (1.99 +/- 0.33 vs. 5.96 +/- 1.02 ng/ml/h for PRA; 1.28 +/- 0.07 vs. 1.42 +/- 0.01 mmol/l for ionized Ca2+: black hypertensives vs. white hypertensives p < 0.05). Ionized Ca2+ was significantly increased (p < 0.05) in the white hypertensive patients as compared with the normotensive controls (1.42 +/- 0.01 vs. 1.29 +/- 0.04 mmol/l). In the black hypertensive group, serum and erythrocyte Mg2+ were significantly (p < 0.05) decreased as compared with the other groups. The erythrocyte Ca2+ concentration was significantly elevated in both black and white hypertensive patients. In the group as a whole, serum Mg2+ and PRA were negatively correlated and ionized Ca2+ and PRA and ionized Ca2+ and erythrocyte Ca2+ positively correlated. However, in the subgroups, these correlations were only significant in the white group: r = -0.67 and p < 0.05 serum Mg2+ vs. PRA; r = 0.64, and p < 0.05 ionized Ca2+ vs. PRA; r = 0.82 and p < 0.01 ionized [Ca2+]i vs. erythrocyte Ca2+. These data suggest a relationship between PRA, Mg2+, and Ca2+ which may be more important in white than in black hypertensive patients. SN - 0378-0392 UR - http://www.unboundmedicine.com/medline/citation/8592486/Relations_between_magnesium_calcium_and_plasma_renin_activity_in_black_and_white_hypertensive_patients_ L2 - https://medlineplus.gov/highbloodpressure.html DB - PRIME DP - Unbound Medicine ER -