1,25-Dihydroxycholecalciferol-dependent calcium uptake by mouse mammary gland in culture.
1,25-Dihydroxycholecalciferol-dependent calcium uptake by mouse mammary gland in culture.
复制标题
培养物中小鼠乳腺对 1,25-二羟基胆钙化醇依赖性钙的吸收。
DOI:
10.1210/endo-122-2-389
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发表时间:
1988
期刊:
影响因子:
4.8
通讯作者:
M. Moruzzi
中科院分区:
文献类型:
--
作者:
G. Mezzetti;M. G. Monti;L. Casolo;G. Piccinini;M. Moruzzi
Mammary explants from pregnant mice cultured in the presence of lactogenic hormones express their differentiated function by producing milk components in vitro. In the present paper radioactive calcium uptake was studied in the mammary gland during terminal differentiation, when lactogenesis was initiated. Under these conditions a relevant accumulation of calcium in the tissue was clearly demonstrable. We have characterized the calcium uptake by the tissue as a saturable and energy dependent process. When 1,25-dihydroxycholecalciferol [1,25-(OH)2D3], the major calcium regulator hormone, was added to the incubation medium the secosteroid strongly stimulated this process by increasing the maximal velocity without significantly altering the Michaelis Menten constant (Km). Detectable increases in calcium uptake could be measured after the explants were cultured with 1,25-(OH)2D3 for 30 min, with the response continuing to increase sharply over time and reaching a plateau at 3 h. The increase was not affected by the presence of actinomycin D or cycloheximide suggesting that the 1,25-(OH)2D3 stimulation of calcium uptake may be independent of de novo protein synthesis. These results provide evidence for early and direct action of the hormonal form of vitamin D in affecting calcium transport across membranes of functionally differentiated epithelial cells of the mammary gland.
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DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Franceschi,RT;DeLuca,HF
通讯作者:
DeLuca,HF
DOI:
10.1002/jbmr.5650010402
发表时间:
1986
期刊:
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
影响因子:
--
作者:
Putkey,JA;Nemere,I;Norman,AW
通讯作者:
Norman,AW
影响因子:
4.8
作者:
Nemere,I;Yoshimoto,Y;Norman,AW
通讯作者:
Norman,AW
影响因子:
18.2
作者:
Wasserman,RH;Fullmer,CS
通讯作者:
Fullmer,CS