IMMUNOCHEMICAL MEASUREMENT OF VITAMIN-D-BINDING PROTEIN IN RAT SERUM

被引：40
|
作者：
BOUILLON, R
VANDOREN, G
VANBAELEN, H
DEMOOR, P
机构：
[1] Laboratorium voor Experimentele Geneeskunde, Katholieke Universiteit Leuven, Rega Instituut, Leuven
来源：
ENDOCRINOLOGY | 1978年 / 102卷 / 06期
关键词：
D O I：
10.1210/endo-102-6-1710
中图分类号：
R5 [内科学];
学科分类号：
1002 ; 100201 ;
摘要：
The vitamin D-binding protein (DBP) was measured in rat serum using a single radial immunodiffusion technique. Normal serum levels at birth (74 ± 11 mg/liter, mean ± SD) were lower than during the last day of fetal life (130 ± 14 mg/liter) and much lower than in adult rats. A marked sex difference in DBP occurred after puberty: male values (656 ± 52 mg/liter) were significantly higher than female values (472 ± 46 mg/liter). The sex difference could be abolished by either adult gonadectomy or transpharyngeal hypophysectomy. Implantation of a pituitary gland under the renal capsule in hypophysectomized male rats further decreased the DBP concentration, suggesting that PRL suppresses the DBP level. A similar decrease was also observed at the end of pregnancy and during lactation. Administration of androgens to either normal female or gonadectomized male rats increased their DBP concentration to the normal adult male level. The serum levels of total 25-hydroxyvitamin D did not fluctuate according to the concentration of DBP, indicating that the concentration of “free 25-hydroxyvitamin D” is not regulated at a constant level. © 1978 by The Endocrine Society.
引用
收藏
页码：1709 / 1715
页数：7
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