H. Oftebro

Publications32
h-index19
Citations1,099
Highly Influential Citations13
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Early postmenopausal bone loss is not associated with a decrease in circulating levels of 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, or vitamin D-binding protein.
To study changes in the rate of bone loss before and after the menopause, 19 normal premenopausal women of the same age were followed with annual measurements of appendicular bone mass for 8 yr.… Expand
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Calcium status and calcium-regulating hormones in alcoholics.
To elucidate effects of chronic ethanol consumption on clinical chemical parameters reflecting overall calcium homeostasis 34 hospitalized male alcoholics and 35 age-matched controls were studied… Expand
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Comparison of changes in testosterone concentrations after strength and endurance exercise in well trained men
SummaryChanges in the testosterone concentrations after single sessions of endurance and strength training were measured in seven well trained men, experienced in both forms of training. Both… Expand
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Subcellular localization of vitamin D3 25-hydroxylase in human liver.
Vitamin D3 25-hydroxylase activity was measured in subcellular and submitochondrial fractions of human liver. Quantitation of 25-hydroxyvitamin D3 was based on high performance liquid chromatography.… Expand
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Establishing a ketoconazole suppression test for verifying testosterone administration in the doping control of athletes.
The ratio of urinary testosterone (u-T) to epitestosterone (T/EpiT) is used to disclose testosterone (T) administration in the doping control of sports, and a ratio greater than 6 constitutes an… Expand
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Cerebrotendinous xanthomatosis: a defect in mitochondrial 26-hydroxylation required for normal biosynthesis of cholic acid.
Oxidation of side chain of 5 beta-cholestane-3 alpha,7 alpha,12 alpha-triol was studied in a patient with cerebrotendinous xanthomatosis (CTX) and in control subjects, using various subcellular… Expand
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Properties of a reconstituted vitamin D3 25-hydroxylase from rat liver mitochondria.
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Role of the 26-hydroxylase in the biosynthesis of bile acids in the normal state and in cerebrotendinous xanthomatosis. An in vivo study.
On the basis of different in vitro studies, we have previously suggested that the basic metabolic defect in the rare inherited disease cerebrotendinous xanthomatosis (CTX) is a lack of a hepatic… Expand
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Detection of testosterone administration by increased ratio between serum concentrations of testosterone and 17 alpha-hydroxyprogesterone.
An increased ratio between urinary testosterone (T) and epitestosterone (epiT) has been accepted by the International Olympic Committee as a marker for T doping. However, in a few subjects, we and… Expand
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Assay of intermediates in bile acid biosynthesis using isotope dilution--mass spectrometry: hepatic levels in the normal state and in cerebrotendinous xanthomatosis.
The synthesis of 2H4-labeled 5 beta-cholestane-3 alpha, 7 alpha-diol, 5 beta-cholestane-3 alpha,7 alpha,12 alpha-triol, 7 alpha-hydroxy-4-cholesten-3-one, and 7 alpha,12… Expand
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