Metabolites of 1 alpha, 25-dihydroxyvitamin D3 in rat bile.
Metabolites of 1 alpha, 25-dihydroxyvitamin D3 in rat bile.
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大鼠胆汁中 1 α, 25-二羟基维生素 D3 的代谢物。
DOI:
10.1021/bi00558a034
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发表时间:
1980
期刊:
影响因子:
2.9
通讯作者:
DeLuca,HF
中科院分区:
文献类型:
--
作者:
Onisko,BL;Esvelt,RP;Schnoes,HK;DeLuca,HF
Materials and MethodsGeneral. Mass spectra were obtained on an AEI Model MS-902 mass spectrometer (Associated Electrical Industries, Ltd., Manchester, England) at 70 eV using a direct probe for sample introduction and a source temperature of 110-130 C above ambient. High-pressure liquid chromatography (HPLC) was performed with a Waters Model M6000A liquid chromatography (Waters, Inc., Melford, MA) equipped with a Model 450 variable-wavelength detector. For SP-HPLC (straight-phase high-pressure liquid chromatography), a Li-Chrosorb Si 60 (Merck & Co., Inc., Rahway, NJ) column [4.6 mm (id) by 250 mm (Z,)] was used. For RP-HPLC (re-versed-phase high-pressure liquid chromatography), a Zor-bax-ODS (Du Pont Instruments, Wilmington, DE) column [4.6 mm (id) by 250 mm (Z,)] was used. All solvents were redistilled before use with the exception of HPLC-grade hexane (Fischer Chemical Co., Itasca, IL). All solvents for HPLC were filtered through 0.2-µ filters (Millipore Corp., Bedford, MA) before use. Unless otherwise noted, solvents were removed by rotary evaporation with a water aspirator and a 25-35 C bath. Synthetic la, 25-(OH) 2D3 was a gift from Hoffmann-La Roche (Nutley, NJ). Synthetic calcitroic acid methyl ester was prepared in this laboratory (R. P. Esvelt, H. F. DeLuca, and. K. Schnoes, unpublishedresults). A mixture of 24-1--3 and 25-1-0-03 had been prepared previously in connection with another project (Napoli et al., 1978). The mixture was fractionated by RP-HPLC, and the identity of the two components was established by NMR (270 MHz) and mass spectrometry. Diazomethane was generated by saponification of ZV-methyl-ZV-nitroso-ptoluenesulfonamide.Radiochemicals and Measurement of Radioactivity. la, 25-(OH) 2 [3a-3H] D3 (28 Ci/mmol) and la, 25-(OH) r [26, 27-14C] D3 (48 Ci/mmol) were prepared as previously described (Esvelt et al., 1979). Purity and authenticity of the radiolabeled compounds were checked by cochromatography with synthetic la, 25-(OH) 2D3 on SP-HPLC using 10% 2-propanol in hexane (Jones & DeLuca, 1975).
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影响因子:
4.8
作者:
Rajiv Kumar;H. Schnoes;H. F. Deluca
通讯作者:
H. F. Deluca
影响因子:
2.9
作者:
R. Esvelt;H. Schnoes;H. DeLuca
通讯作者:
H. DeLuca
影响因子:
4.8
作者:
Y. Tanaka;L. Castillo;H. DeLuca
通讯作者:
H. DeLuca
影响因子:
2.9
作者:
Rajiv Kumar;Deborah Harnden;H. F. Deluca
通讯作者:
H. F. Deluca
DOI:
10.1042/bj0970408
发表时间:
1965
期刊:
The Biochemical journal
影响因子:
--
作者:
D. D. Webling;E. Holdsworth
通讯作者:
E. Holdsworth