LC-ICP-MS method for the determination of 'extractable copper' in serum
Autor: | C. Derrick Quarles, M. Paul Field, Bernhard Michalke, Patrick Sullivan, Hans Zischka, Uwe Karst, Marcel Macke |
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Rok vydání: | 2019 |
Předmět: |
0301 basic medicine
Biophysics chemistry.chemical_element Mass spectrometry 01 natural sciences Biochemistry Mass Spectrometry Biomaterials 03 medical and health sciences Hepatolenticular Degeneration Healthy control medicine Animals Sample preparation Menkes Kinky Hair Syndrome Inductively coupled plasma mass spectrometry Chromatography biology 010401 analytical chemistry Metals and Alloys medicine.disease Copper Clinical method 0104 chemical sciences Rats ddc 030104 developmental biology chemistry Chemistry (miscellaneous) biology.protein Menkes disease Ceruloplasmin |
Zdroj: | Metallomics 12, 1348-1355 (2020) |
Popis: | Copper is an essential element for biological functions within humans and animals. There are several known diseases associated with Cu deficiency or overload, such as Menkes disease and Wilson disease, respectively. A common clinical method for determining extractable Cu levels in serum, which is thought to be potentially dangerous if in excess, is to subtract the value of tightly incorporated Cu in ceruloplasmin from total serum Cu. In this work, an automated sample preparation and liquid chromatography (LC) system was combined with inductively coupled plasma-mass spectrometry (ICP-MS) to determine bound Cu and extractable Cu in serum. This LC-ICP-MS method took 250 s for sample preparation and analysis, followed by a column recondition/system reset, thus, a 6 minute sample-to-sample time including sample preparation. The method was validated using serum collected from either control (Atp7b+/−) or Wilson disease rats (Atp7b−/−). The extractable Cu was found to be 4.0 ± 2.3 μM Cu in healthy control rats, but 2.1 ± 0.6 μM Cu in healthy Wilson rats, and 27 ± 16 μM Cu in diseased Wilson rats, respectively. In addition, the extractable Cu/bound Cu ratio was found to be 6.4 ± 3.5%, 38 ± 29%, and 34 ± 22%, respectively. These results suggest that the developed method could be of diagnostic value for Wilson disease, and possibly other copper related diseases. |
Databáze: | OpenAIRE |
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