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The interaction between dietary calcium and gonadal hormones in their effect on plasma calcium, bone, 25-hydroxycholecalciferol-1-hydroxylase, and duodenal calcium-binding protein, measured by a radio-immunoassay in chicks
Year:
1979
Source of publication :
Endocrinology
Authors :
בר, אריה
;
.
הורביץ, שמואל
;
.
Volume :
104
Co-Authors:
Bar, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
1455
To page:
1460
(
Total pages:
6
)
Abstract:
Male chicks, fed low, normal, or high calciumand cholecalciferol-containing diets for 14 days, were given three combined injections of 17β-estradiol and testosterone (7 and 2.4 mg/kg/dose, respectively) or the vehicle alone, at 3-day intervals. The hormonal treatment resulted in increased plasma calcium and medullary bone calcium concentrations, independently of the dietary calcium intake. Kidney 25-hydroxycholecalciferol-lhydroxylase and duodenal calcium-binding protein were increased in response to gonadal hormones. The magnitude of this response markedly diminished with increased calcium intake and almost completely disappeared in chicks fed the high calcium diet. The results suggest that the increases in plasma calcium and medullary bone formation due to gonadal hormones are independent of calcium intake while the effect of hormones on duodenal calcium-binding protein and the 25-hydroxycholecalciferol-1-hydroxylase activity appears to be mediated through the change in calcium needs due to medullary bone formation. © 1979 by The Endocrine Society.
Note:
Related Files :
25 hydroxycolecalciferol hydroxylase
Animal
animal experiment
Bone
Duodenum
Male
עוד תגיות
תוכן קשור
More details
DOI :
10.1210/endo-104-5-1455
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31407
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:02
You may also be interested in
Scientific Publication
The interaction between dietary calcium and gonadal hormones in their effect on plasma calcium, bone, 25-hydroxycholecalciferol-1-hydroxylase, and duodenal calcium-binding protein, measured by a radio-immunoassay in chicks
104
Bar, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
The interaction between dietary calcium and gonadal hormones in their effect on plasma calcium, bone, 25-hydroxycholecalciferol-1-hydroxylase, and duodenal calcium-binding protein, measured by a radio-immunoassay in chicks
Male chicks, fed low, normal, or high calciumand cholecalciferol-containing diets for 14 days, were given three combined injections of 17β-estradiol and testosterone (7 and 2.4 mg/kg/dose, respectively) or the vehicle alone, at 3-day intervals. The hormonal treatment resulted in increased plasma calcium and medullary bone calcium concentrations, independently of the dietary calcium intake. Kidney 25-hydroxycholecalciferol-lhydroxylase and duodenal calcium-binding protein were increased in response to gonadal hormones. The magnitude of this response markedly diminished with increased calcium intake and almost completely disappeared in chicks fed the high calcium diet. The results suggest that the increases in plasma calcium and medullary bone formation due to gonadal hormones are independent of calcium intake while the effect of hormones on duodenal calcium-binding protein and the 25-hydroxycholecalciferol-1-hydroxylase activity appears to be mediated through the change in calcium needs due to medullary bone formation. © 1979 by The Endocrine Society.
Scientific Publication
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