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author = "Halloran, B P"
1
Found 10 documents, displaying page 1 of 1
Physiologic regulation of the serum concentration of 1,25-dihydroxyvitamin D by phosphorus in normal men.
Description :
We asked this question: in normal humans, is either a normal dietary intake or normal serum concentration of phosphorus a determinant of the serum concentration of 1,25(OH)2D? In seven normal men whose dietary phosphorus was decreased from 2,300 to 625 mg/d, each intake for 8-9 d, under strictly con...
Repository :
Europe PubMed Central
Language(s) :
English
Dietary intake of phosphorus modulates the circadian rhythm in serum concentration of phosphorus. Implications for the renal production of 1,25-dihydroxyvitamin D.
Description :
We recently reported that in healthy men, changes in the production rate (PR) of 1,25-dihydroxyvitamin D [1,25-(OH)2D] accounted for the 80% increase and the 30% decrease in its serum concentration that was induced by restriction and supplementation, respectively, of dietary phosphorus. These change...
Repository :
Europe PubMed Central
Language(s) :
English
Oral intake of phosphorus can determine the serum concentration of 1,25-dihydroxyvitamin D by determining its production rate in humans.
Description :
Changes in the oral intake of phosphorus could induce the reported changes in the serum concentration of 1,25-dihydroxyvitamin D (1,25-(OH)2D) by inducing changes in its production rate (PR) or metabolic clearance rate (MCR), or both. To investigate these possibilities, we employed the constant infu...
Repository :
Europe PubMed Central
Language(s) :
English
Long-term control of plasma calcitriol concentration in dogs and humans. Dominant role of plasma calcium concentration in experimental hyperparathyroidism.
Description :
Despite great interest in the elevated circulating levels of calcitriol (1,25-[OH]2D) associated with the clinical syndrome of human primary hyperparathyroidism, the relative potencies of known and potential stimuli/suppressors of long-term calcitriol levels have not been evaluated in either clinica...
Repository :
Europe PubMed Central
Language(s) :
English
Effect of dietary phosphorus on circulating concentrations of 1,25-dihydroxyvitamin D and immunoreactive parathyroid hormone in children with moderate renal insufficiency.
Description :
The hyperparathyroidism characteristic of patients with moderate renal insufficiency could be caused by decreases in the plasma concentration of ionized calcium (Ca++) evoked by: (a) recurring increases in the plasma concentration of inorganic phosphorus that may be detectable only in the post-prand...
Repository :
Europe PubMed Central
Language(s) :
English
Vitamin D metabolism during pregnancy and lactation in the rat.
Description :
The plasma concentration of the major vitamin D metabolites; 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, and 24,25-dihydroxyvitamin D were measured during pregnancy and lactation in the adult female rat. The concentrations of these metabolites were also measured in rat pups during lactation and af...
Repository :
Europe PubMed Central
Language(s) :
English
Free 25-hydroxyvitamin D levels are normal in subjects with liver disease and reduced total 25-hydroxyvitamin D levels.
Description :
We determined the free fraction of 25-dihydroxyvitamin D (25OHD) in the serum of subjects with clinical evidence of liver disease and correlated these measurements to the levels of vitamin D binding protein and albumin. These subjects when compared to normal individuals had lower total 25OHD levels,...
Repository :
Europe PubMed Central
Language(s) :
English
High levels of a parathyroid hormone-like protein in milk.
Description :
Expression of a parathyroid hormone-like protein (PLP), which is associated with hypercalcemia in malignancy, has recently been localized to normal lactating mammary tissue. We examined the possibility of an extramammary role of PLP by measuring its levels in serum and milk of lactating women. The l...
Repository :
Europe PubMed Central
Language(s) :
English
Chronic 1,25-dihydroxyvitamin D3 administration in the rat reduces the serum concentration of 25-hydroxyvitamin D by increasing metabolic clearance rate.
Description :
Administration of 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] can lower the serum concentration of 25-hydroxyvitamin (25-OH-D). To determine if 1,25(OH)2D3 lowers serum 25-OH-D by increasing clearance or reducing production, we directly measured the metabolic clearance rate (MCR) of 25-OH-D in rats chron...
Repository :
Europe PubMed Central
Language(s) :
English
A longitudinal study of calcium homeostasis during human pregnancy and lactation and after resumption of menses.
Author(s) :
Ritchie, L.D.
,
Fung, E.B.
,
Halloran, B.P.
,
Turnlund, J.R.
,
Van Loan, M.D.
,
Cann, C.E.
,
King, J.C.
,
USDA, ARS
Description :
To clarify the role of the intestine, kidney, and bone in maintaining calcium homeostasis during pregnancy and lactation and after the resumption of menses, a longitudinal comparison was undertaken of 14 well-nourished women consuming approximately 1200 mg Ca/d. Measurements were made before concept...
Repository :
中国西部环境与生态知识积累平台 - SeekSpace
Language(s) :
Undetermined
1
Found 10 documents, displaying page 1 of 1