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ISSN 1561-3011 (Electronic)

2021, Number 4

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Rev Cubana Invest Bioméd 2021; 40 (4)

Magnesium and osseous-mineral biochemical indicators according to glomerular filtration rate testing in students without kidney disease

Brissón C, Cuestas V, Denner S, Prono MP, Fernández V, Bonifacino BR, Colussi V, Marsili S, Brissón ME, Rosso F

Language: Spanish
References: 12
Page: 1-12
PDF size: 251.29 Kb.


ABSTRACT

Introduction: Not much is known about the variation in magnesium and biochemical indicators of the osseous-mineral metabolism according to glomerular filtration rate testing in young people without kidney disease. This variation should therefore be considered to delimit whatever is not attributable to chronic kidney disease. The role played by magnesium is currently under study. In chronic kidney disease a progressive alteration of the osseous-mineral metabolism starts early.
Objectives: Evaluate serum values of magnesium, calcium, phosphorus, alkaline phosphatase and parathormone, 24-hour urinary excretion and fractional excretion of these electrolytes according to category G of the glomerular filtration rate estimated by creatinine clearance: G1 (normal to high) and G2 (slightly reduced) in students without chronic kidney disease.
Methods: An analytical cross-sectional study was conducted of a sample of 55 student volunteers without kidney disease in the period 2018-2019. The analytes were determined in serum and some in 24-hour urine.
Results: Only serum magnesium and magnesium fractional excretion displayed significant differences according to category G (p < 0.05). Serum magnesium values were within the reference values for the method. In G2, serum magnesium was lower than in G1, whereas magnesium fractional excretion was higher, i.e. an inverse relation is observed. Serum magnesium reduction averaged 0.26 mg/dl per unit of magnesium fractional excretion increase (p = 0.0502).
Conclusions: Comparison of G1 and G2 results revealed differences in serum magnesium and magnesium fractional excretion. The remaining biochemical indicators studied did not show any differences in category G. Longitudinal studies with larger samples may or may not confirm these findings, thus contributing to a better understanding of the biochemical changes in osseous-mineral metabolism occurring in the initial stages of glomerular filtration rate reduction.


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