Postnatal changes in serum osteocalcin and parathyroid hormone concentrations.
Postnatal changes in serum osteocalcin and parathyroid hormone concentrations.
复制标题
产后血清骨钙素和甲状旁腺激素浓度的变化。
DOI:
10.1080/07315724.1990.10720393
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发表时间:
1990
影响因子:
3.5
通讯作者:
Tsang,RC
中科院分区:
文献类型:
--
作者:
Loughead,JL;Mimouni,F;Ross,R;Tsang,RC
Cord clamping at birth leads to interruption of calcium (Ca) supply to the fetus. After birth, neonatal parathyroid hormone (PTH) secretion appears stimulated by hypocalcemia, with serum PTH increasing after birth and peaking at 24 hours of age. This rise in PTH presumably leads to bone resorption and Ca release. We theorize that bone formation may also be affected and that a serum marker of bone formation, serum osteocalcin (OC) concentrations, will decrease postnatally. OC is synthesized by osteoblasts and its serum concentrations are believed to reflect bone formation. We measured serum ionized Ca (iCa), PTH, and OC in cord blood and at 2 and 24 hours in 26 neonates born after uncomplicated pregnancies, labors, and deliveries. Serum iCa (mg/dl) decreased from 5.79 +/− 0.06 (cord, means +/− SEM) to 5.31 +/− 0.05 (2 hr), then to 4.89 +/− 0.05 (24 hr) (p less than 0.05). Serum PTH (microliter Eq/ml) increased from 35.9 +/− 4.3 (cord) to 41.7 +/− 4.0 (2 hr) (p = 0.1), and to 50.3 +/− 4.6 (24 hr) (p less than 0.01). Serum OC (ng/ml) decreased from 55.1 +/− 10.6 (cord), to 12.4 +/− 4.3 (2 hr) (p less than 0.01), then remained stable at 12.7 +/− 1.9 (24 hr). The change (cord minus 24 hr) in OC correlated inversely with the change in PTH over the first 24 hours of age (r = -0.42. p = 0.03). Therefore, there is a sudden decrease in an index of bone formation (i.e., serum OC) in the first 24 hours of life in which rising serum PTH may have had an impact.(ABSTRACT TRUNCATED AT 250 WORDS)
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影响因子:
158.5
作者:
J. Steichen;R. Tsang;T. Gratton;A. Hamstra;H. DeLuca
通讯作者:
H. DeLuca
影响因子:
15.9
作者:
M S Calvo;M J Fryer;K J Laakso;R. Nissenson;P A Price;T M Murray;H. Heath
通讯作者:
H. Heath
DOI:
10.1016/0221-8747(84)90064-x
发表时间:
1984-01-01
期刊:
METABOLIC BONE DISEASE & RELATED RESEARCH
影响因子:
--
作者:
BERESFORD, JN;GALLAGHER, JA;RUSSELL, RGG
通讯作者:
RUSSELL, RGG
DOI:
10.1016/s0021-9258(18)42960-2
发表时间:
1981-12
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
P. Price;M. Williamson;J. W. Lothringer
通讯作者:
P. Price;M. Williamson;J. W. Lothringer
DOI:
10.1172/jci106476
发表时间:
1971
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
C. Arnaud;H. S. Tsao;T. Littledike
通讯作者:
T. Littledike