Abstract |
Fasting serum 1 alpha, 25-dihydroxyvitamin D [1,25-( OH)2D] levels were measured in 3 groups of hypophosphatemic vitamin D-resistant rickets (VDRR) patients; those untreated; those treated with vitamin D and phosphate; and those treated with 1,25-(OH)2D3 and phosphate. In the untreated patients, the mean 1,25-(OH)2D level was higher than in our age-matched control group. Except for one at 66 pg/ml, individual values were however within normal limits. Long term vitamin D2 therapy was accompanied by a slight but significant decrease in 1,25-(OH)2D concentrations; nonetheless the levels remained within the normal range. In the third group of patients, the concentration of 1,25-(OH)2D rose to supranormal levels when sampling was done 1-3 hours after administration of the hormone, decreasing rapidly to levels below that of normal subjects when the specimens were collected 12-24 hours later. Our data show that an alteration of the vitamin D activation pathway is unlikely to be part of the pathogenic mechanism underlying the VDRR condition.
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Authors | E E Delvin, F H Glorieux |
Journal | Calcified tissue international
(Calcif Tissue Int)
Vol. 33
Issue 2
Pg. 173-5
( 1981)
ISSN: 0171-967X [Print] United States |
PMID | 6260313
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Dihydroxycholecalciferols
- Ergocalciferols
- Hydroxycholecalciferols
- Parathyroid Hormone
- Phosphates
- Alkaline Phosphatase
- Calcitriol
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Topics |
- Adolescent
- Alkaline Phosphatase
(blood)
- Calcitriol
- Child
- Child, Preschool
- Dihydroxycholecalciferols
(blood)
- Ergocalciferols
(therapeutic use)
- Female
- Humans
- Hydroxycholecalciferols
(blood)
- Hypophosphatemia, Familial
(blood, drug therapy)
- Male
- Parathyroid Hormone
(blood)
- Phosphates
(blood, therapeutic use)
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