Compound-specific carbon isotope ratio determination of enriched cholesterol.

Compound-specific carbon isotope ratio determination of enriched cholesterol.
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富集胆固醇的化合物特异性碳同位素比测定。

DOI:
10.1021/ac00063a006
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发表时间:
1993
影响因子:
7.4
通讯作者:
Schoeller,D
Schoeller,D
中科院分区:
化学1区
文献类型:
--
作者:
Guo,ZK;Luke,AH;Lee,WP;Schoeller,D

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评价了在线气相色谱/燃烧/同位素比值质谱(GC/C/IRMS)在人体胆固醇代谢稳定同位素研究中的应用。通过分析13 C丰度范围内的未衍生化和TMS-胆固醇构建校准曲线,所述13 C丰度范围为从天然丰度至每摩尔未标记胆固醇0.05摩尔[3,4- 13 C]胆固醇(S 13 C-24至270%o)。校准曲线高度线性(r* 12=0.99),未衍生化和TMS-胆固醇的斜率分别为0.98和0.88。用TMS-胆固醇测定~(13)C/~(12)C比值的精密度较高,检出限(2SD)为0.3%o或0.004mol%[3,4-~(13)C]-胆固醇。通过比较,标准GC/MS对[3,4- 13 C]胆甾醇的检测限为0.06 mol%。在一名口服50 mg [3,4- 13 C]胆固醇的人类受试者中进行了一项为期57天的胆固醇消除研究。峰富集比基线高9%(检测限的40倍),并且可以跟踪40-50天。结果表明,GC/C/IRMS对[3,4- 13 C]-胆固醇的检测限比GC/MS低15倍,可用于人体胆固醇代谢的研究。
On-line gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) was evaluated for use in stable isotope studies of human cholesterol metabolism. Calibration curves were constructed by analyzing underivatized and TMS-cholesterol over a range of 13C abundances from natural abundance to 0.05 mol of [3, 4-13C] choles-terol per mole of unlabeled cholesterol (S 13C-24 to 270% o). The calibration curves were highly linear (r* 12=0.99) with slopes of 0.98 and 0.88 for underivatized and TMS-cholesterol, respectively. Higher precision of 13C/12C ratio determination was obtained using TMS-cholesterol, with a detection limit (2 SD) of 0.3% o or 0.004 mol% of [3, 4-13C]-cholesterol. By comparison standard GC/MS had a detection limit of 0.06 mol% for [3, 4-13C] choles-terol. A 57-day study of cholesterol elimination was conducted in one human subject with oral administration of 50 mg of [3, 4-13C] cholesterol. Peak enrichment was 9% o above baseline (40 times the detection limit) and could be followed for 40-50 days. The results indicate that GC/C/IRMS provides 15-fold lower detection limits for [3, 4-13C]-choleseterol than GC/MS and is useful for human studies of cholesterol metabolism.
2H2O 体内胆固醇合成的测量:红细胞胆固醇的分离、燃烧和同位素测定的快速程序。
DOI: --
发表时间: 1991
影响因子: 6.5
作者:
W. Wong;D. Hachey;A. Feste;J. Leggitt;L. L. Clarke;W. Pond;P. Klein
通讯作者: P. Klein
内源性和外源性血浆胆固醇的同位素研究。
DOI: --
发表时间: 1955
影响因子: 15.9
作者:
L. Hellman;R. Rosenfeld;M. L. Eidinoff;D. Fukushima;T. Gallagher;C. Wang;D. Adlersberg
通讯作者: D. Adlersberg
DOI: --
发表时间: 1991
期刊:
影响因子: --
作者:
D. M. Jones;J. Carter;G. Eglinton;E. J. Jumeau;C. Fenwick
通讯作者: C. Fenwick
人体胆固醇动态的体内估计方法。
DOI: --
发表时间: 1977
影响因子: 7.1
作者:
S. Quarfordt
通讯作者: S. Quarfordt
DOI: 10.1021/ac00034a004
发表时间: 1992-05-15
影响因子: 7.4
作者:
GOODMAN, KJ;BRENNA, JT
通讯作者: BRENNA, JT