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The lack of relationships between vitamin D3 metabolites and calcium-binding protein in the eggshell gland of laying birds
Year:
1984
Authors :
Bär, Arie
;
.
Hurvitz, Shmuel (Animal science)
;
.
Volume :
78
Co-Authors:
Bar, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
Rosenberg, J., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
Facilitators :
From page:
75
To page:
79
(
Total pages:
5
)
Abstract:
1. 1. The relationship of the metabolism of vitamin D3 and calcium-binding protein (CaBP) to calcium transport by the eggshell gland (ESG) was assessed in chickens. 2. 2. Plasma or ESG 1,25 dihydroxyvitamin D3 (1,25(OH)2D3) and ESG CaBP were no different between periods of ESG inactivity and of shell calcification. 3. 3. A severe dietary calcium deficiency resulted in increased kidney 25-hydroxycholecalciferol-1-hydroxylase activity (542%), plasma and ESG 1,25(OH)2D3 concentrations (193 and 274%, respectively), but in decreased ESG CaBP (34%), associated with the production of poorly calcified eggs. Significant correlations were found between 25 hydroxycholecalciferol-1-hydroxylase, plasma 1,25(OH)2D3 and ESG 1,25(OH)2D3, but not between ESG 1,25(OH)2D3 and CaBP. 4. 4. Hens with a low shell density had a significantly lower (55%) ESG CaBP than those with high shell density, without any significant change in ESG 1,25(OH)2D3. Significant correlations were found between ESG CaBP and shell calcium. 5. 5. Total receptors for 1,25(OH)2D3 were lower in ESG than in the intestine. 6. 6. The results suggest that CaBP level and calcium transport in the ESG are not regulated by 1,25(OH)2D3. © 1984.
Note:
Related Files :
Animal
Egg Shell
Female
metabolism
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Related Content
More details
DOI :
10.1016/0305-0491(84)90148-2
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19607
Last updated date:
21/08/2022 07:45
Creation date:
16/04/2018 23:30
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Scientific Publication
The lack of relationships between vitamin D3 metabolites and calcium-binding protein in the eggshell gland of laying birds
78
Bar, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
Rosenberg, J., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel (Tel: 5430)
The lack of relationships between vitamin D3 metabolites and calcium-binding protein in the eggshell gland of laying birds
1. 1. The relationship of the metabolism of vitamin D3 and calcium-binding protein (CaBP) to calcium transport by the eggshell gland (ESG) was assessed in chickens. 2. 2. Plasma or ESG 1,25 dihydroxyvitamin D3 (1,25(OH)2D3) and ESG CaBP were no different between periods of ESG inactivity and of shell calcification. 3. 3. A severe dietary calcium deficiency resulted in increased kidney 25-hydroxycholecalciferol-1-hydroxylase activity (542%), plasma and ESG 1,25(OH)2D3 concentrations (193 and 274%, respectively), but in decreased ESG CaBP (34%), associated with the production of poorly calcified eggs. Significant correlations were found between 25 hydroxycholecalciferol-1-hydroxylase, plasma 1,25(OH)2D3 and ESG 1,25(OH)2D3, but not between ESG 1,25(OH)2D3 and CaBP. 4. 4. Hens with a low shell density had a significantly lower (55%) ESG CaBP than those with high shell density, without any significant change in ESG 1,25(OH)2D3. Significant correlations were found between ESG CaBP and shell calcium. 5. 5. Total receptors for 1,25(OH)2D3 were lower in ESG than in the intestine. 6. 6. The results suggest that CaBP level and calcium transport in the ESG are not regulated by 1,25(OH)2D3. © 1984.
Scientific Publication
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