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  • Title: Relationships between calcium and phosphorus homeostasis, parathyroid hormone levels, bone aluminum, and bone histomorphometry in patients on maintenance hemodialysis.
    Author: Nilsson P, Melsen F, Malmaeus J, Danielson BG, Mosekilde L.
    Journal: Bone; 1985; 6(1):21-7. PubMed ID: 2581596.
    Abstract:
    Serum biochemistry related to calcium and phosphorus homeostasis and parathyroid function was studied together with bone histomorphometry after double-labeling with tetracycline and staining for aluminum in 17 patients without symptoms of bone disease, treated with maintenance hemodialysis for at least 6 months. A close correlation was found between the serum level of parathyroid hormone (PTH) and bone resorption surfaces and bone formation rates, both at tissue and basic multicellular unit (BMU) levels. The patients could be divided into a high turnover group with a normal mineralization process and a low turnover group with markedly defective mineralization. The second group was further characterized by lower PTH and higher fractional aluminum-stained trabecular bone surfaces. For the whole patient material, the fractional aluminum-stained surfaces related inversely to tetracycline-labeled surfaces and to bone formation rates at both BMU and tissue levels, but not to the time on dialysis or to the cumulative ingested amount of aluminum hydroxide. The data provide evidence that PTH or PTH-related factors, besides activating bone remodeling, directly enhance bone formation in dialysis patients and that aluminum incorporation into bone is associated with a progressive disturbance of bone mineralization.
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