An improved radioreceptor assay for 1,25-dihydroxyvitamin D in human plasma.
An improved radioreceptor assay for 1,25-dihydroxyvitamin D in human plasma.
复制标题
人血浆中 1,25-二羟基维生素 D 的改进放射性受体测定。
DOI:
10.1016/0003-2697(81)90346-8
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发表时间:
1981
影响因子:
2.9
通讯作者:
Haussler,MR
中科院分区:
文献类型:
--
作者:
Dokoh,S;Pike,JW;Chandler,JS;Mancini,JM;Haussler,MR
We describe a modified assay technique for quantitating 1,25-dihydroxyvitamin D in plasma. The method involves a rapid extraction of the hormone using minicolumn (made of granular diatomaceous earth) chromatography followed by single-step purification on high-performance liquid chromatography. Quantitation of plasma 1,25-dihydroxyvitamin D is achieved by a radioligand receptor assay employing lyophilized cytosolic receptor protein from chick intestine and high-specific-activity 1,25-dihydroxy[3H]vitamin D3(166 Ci/mmol). A new incubation medium including an ethanol extract of vitamin D-deficient chick serum yields high specific binding and improves the precision of the radioassay. Bound and free hormone are separated with dextran-coated charcoal of equivalent particle size. The method is sensitive to 0.5 pg/tube with a practical detection range of 1–20 pg/tube, permitting duplicate assay of endogenous 1,25-dihydroxyvitamin D in plasma volumes as small as 0.5 ml. The intra- and interassay coefficient of variation are 5 and 9%, respectively, and the method is valid over a wide-range sample dilution. This assay technique was applied to the measurement of plasma 1,25-dihydroxyvitamin D hormone concentration in normal young adults (55.2 ± 13.6 pg/ml; n = 20) and in patients with chronic renal failure (13.5 ± 5.2 pg/ml; n = 9) and primary hyperparathyroidism (83.3 ± 18 pg/ml; n = 10).
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影响因子:
4.7
作者:
COSTALL, B;OLLEY, JE
通讯作者:
OLLEY, JE
影响因子:
56.9
作者:
HD Christensen;R. Freudenthal;J. T. Gidley;Ronald Rosenfeld;G. Boegli;L. Testino;D. Brine;C. G. Pitt;Monroe E. Wall
通讯作者:
Monroe E. Wall
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
R. Ford;R. Balster;W. Dewey;J. Beckner
通讯作者:
J. Beckner
影响因子:
--
作者:
G. S. Chopra;J. Smith
通讯作者:
J. Smith
DOI:
--
发表时间:
1978
期刊:
The Journal of pharmacy and pharmacology
影响因子:
--
作者:
W. Yisak;S. Agurell;J. Lindgren;M. Widman
通讯作者:
M. Widman