Metabolic Kinetics of tert-Butylhydroquinone and Its Metabolites in Rat Serum after Oral Administration by LC/ITMS

Lipids ◽  
2008 ◽  
Vol 43 (8) ◽  
pp. 757-763 ◽  
Author(s):  
Wen Huang ◽  
Hai Niu ◽  
Yinchun Gu
Keyword(s):  
Oral Administration ◽  
Rat Serum ◽  
Metabolic Kinetics ◽  
Kinetics Of

scholarly journals Attribution and identification of absorbed components by HPLC-DAD-ESI-MS after oral administration of Erhuang decoction

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jinglong Wang ◽  
Dandan Zheng ◽  
Nan Xu ◽  
Chao Zhang ◽  
Yingzi Wang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Oral Administration ◽  
Mass Spectrometry Data ◽  
Mass Spectrometry Analysis ◽  
Original Form ◽  
Bioactive Constituents ◽  
Serum Samples ◽  
Rat Serum ◽  
Esi Ms

AbstractTo realize the attribution and identification of absorbed components in rat serum after oral administration of Erhuang decoction prepared by semi-bionic enzyme extraction method, the fingerprints of serum samples were established using a HPLC-DAD-ESI-MS method. Thirty-two peaks in Erhuang decoction and 24 peaks in rat serum after oral administration of Erhuang decoction were detected. Among the 24 peaks detected in rat serum, 25 compounds were identified by comparing the retention time and mass spectrometry data with that of reference compounds, or by mass spectrometry analysis and retrieving the reference literatures. Among the identified 25 compounds in vivo, 24 were the original form of compounds absorbed from the detected compounds in vitro, and one was the metabolite compounds of licorice. By analyzing the mass spectrometry or ultraviolet absorption characteristics, other unidentified compounds in vivo were deduced to be the endogenous metabolites in serum or the original form and metabolites of the compounds existed in vivo. Results indicated that HPLC-DAD-ESI-MS is suitable for identifying the bioactive constituents in serum after oral administration of Erhuang decoction, and the findings would be beneficial to further research and development of the pharmacodynamic substance base of Erhuang decoction.

scholarly journals Quantification of in vivo metabolic kinetics of hyperpolarized pyruvate in rat kidneys using dynamic 13 C MRSI

2011 ◽  
Vol 24 (8) ◽  
pp. 997-1005 ◽  
Author(s):  
Tao Xu ◽  
Dirk Mayer ◽  
Meng Gu ◽  
Yi-Fen Yen ◽  
Sonal Josan ◽  
...  
Keyword(s):  
Metabolic Kinetics ◽  
Kinetics Of ◽  
Rat Kidneys

Biodisposition Kinetics of Levofloxacin in Female Vlounteers Following Oral Administration

2000 ◽  
Vol 3 (9) ◽  
pp. 1484-1486 ◽  
Author(s):  
Rabis Iqbal ◽  
M. Anjum Zia ◽  
Tahira Iqbal ◽  
Faqir Hussain
Keyword(s):  
Oral Administration ◽  
Kinetics Of

Oral administration of radioactive sulfate to measure extracellular fluid space in man

1976 ◽  
Vol 40 (4) ◽  
pp. 648-650 ◽  
Author(s):  
J. H. Bauer
Keyword(s):  
Oral Administration ◽  
Human Subjects ◽  
Extracellular Fluid ◽  
Mean Difference ◽  
Routes Of Administration ◽  
Extracellular Fluid Space ◽  
The Mean ◽  
Kinetics Of ◽  
Plasma Activity

Radioactive sulfate-35 (35S) was administered to eight human subjects intravenously and orally, to compare respective kinetics of distribution. Intravenously administered 35S attained equilibration within 60–90 min. Orally administered 35S attained equilibration within 60–105 min and thereafter achieved plasma activity equivalent to the intravenously administered tracer. Eighty percent or greater of the 35S dose was recovered in the 24-h urine, following either intravenous or oral administration. The mean extracellular fluid space demonstrated less than 9% mean difference between routes of administration. It is concluded that 35S is completely absorbed at tracer doses, and may be administered orally as a reliable substitute for intravenously administered 35S for measuring extracellular fluid space.

scholarly journals A fluorescent residualizing label for studies on protein uptake and catabolism in vivo and in vitro

1990 ◽  
Vol 267 (1) ◽  
pp. 155-162 ◽  
Author(s):  
J L Maxwell ◽  
L Terracio ◽  
T K Borg ◽  
J W Baynes ◽  
S R Thorpe
Keyword(s):  
Half Life ◽  
Normal Tissue ◽  
Degradation Products ◽  
Rat Serum ◽  
Peripheral Tissues ◽  
Protein Uptake ◽  
Kinetics Of ◽  
Rat Serum Albumin

Residualizing labels are tracers which remain in lysosomes after uptake and catabolism of the carrier protein and have been especially useful for studies on the sites of plasma protein degradation. Thus far these labels have contained radioactive reporters such as 3H or 125I. In the present paper we describe a fluorescent residualizing label, NN-dilactitol-N′-fluoresceinylethylenediamine (DLF). Modification of asialofetuin (ASF) or rat serum albumin (RSA) with DLF affected neither their normal kinetics of clearance from the rat circulation nor their normal tissue sites of uptake and degradation. After injection of DLF-ASF, fluorescent degradation products were recovered nearly quantitatively in liver and retained with a half-life of about 2 days. Fluorescent degradation products from DLF-RSA were recovered in skin and muscle, and were localized in fibroblasts by fluorescence microscopy. These results confirm previous studies with radioactive residualizing labels in which fibroblasts in peripheral tissues were identified as primary sites of albumin degradation. Fluorescent catabolites also accumulated in fibroblasts incubated with DLF-RSA in vitro, and residualized with a half-life of about 2 days. Overall, the data establish that DLF functions efficiently as a fluorescent residualizing label both in vivo and in vitro. The advantages of fluorescent, compared with radioactive, residualizing labels should make them valuable tools for studies on protein uptake and catabolism in biological systems.

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