Method to assay coenzyme Q 10 in blood plasma or blood serum

Chemistry: analytical and immunological testing – Including chromatography

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C435S004000

Reexamination Certificate

active

10444535

ABSTRACT:
A method is described for determining CoQ10concentrations in plasma samples. CoQ10in the plasma sample is oxidized by treating the sample with an oxidizing agent having a redox potential higher than the redox potential of CoQ10, such as, for example, para-benzoquinone. Following oxidation of the CoQ10, the CoQ10in the plasma sample is extracted with an alcohol, such as, for example, 1-propanol. The alcohol extract is analyzed using direct injection into the HPLC apparatus. This method achieves a rapid, accurate analysis of plasma CoQ10levels, which can be used for monitoring the bioavailability of orally administered CoQ10used as a food supplement or as an adjunctive therapy.

REFERENCES:
Hiroshima et al. “Rapid method for determination of ubiquinone in biological materials by high-performance liquid chromatography”, Bitamin, 1985, 59(9), 457-63, Abstract.
Tomasetti, et al., Distribution of antioxidants among blood components and lipoproteins: significance of lipids/CoQ10ration as a possible marker of increased risk for atherosclerosis. BioFactors, 9, 231-240 (1999).
Littarru, et al., Metabolic and diagnostic implications of human blood Q10levels, in Biomedical and Clinical Aspects of Coenzyme Q vol. VI, (eds. K. Folkers, G.P. Littarru, T. Yamagami), Elsevier North Holland, pp. 167-178 (1991).
Alleva, et al., Oxidation of LDL and their subfractions: kinetic aspects and CoQ10content. Molec Asp Med, 18 s015-s112 (1997).
Mortenson, et al., Dose-related decrease of serum coenzyme Q10during treatment with HMG-CoA reductase inhibitors. Molec Asp Med, 18, s137-s144 (1997).
Lang, et al., Quantitative determination of vitamin E and oxidized and reduced coenzyme Q by high-performance liquid chromatography with in-line ultraviolet and electrochemical detection, J Chromatogr, 385, 109-117 (1987).
Finckh, et al., High-performance liquid chromatography-coulometric electrochemical detection of ubiquinol 10, ubiquinone 10, carotenoids and tocopherols in neonatal plasma, in Methods in Enzymology, vol. 299 (Lester Packer Ed.), pp. 341-348, Academic Press, San Diego (1999).
Podda, et al., Sensitive high-performance liquid chromatography techniques for simultaneous determination of tocopherols, tocotrienols, ubiquinols and ubiquinones in biological samples in Methods in Enzymology, vol. 299, (Lester Packer Ed.), pp. 330-341, Academic Press, San Diego (1999).
Finckh, et al., Monitoring of ubiquinol 10, ubiquinone 10, carotenoids and tocopherols in neonatal plasma microsamples using high-performance liquid chromatography with coulometric electrochemical detection. Anal. Biochem, 232, 210-216 (1985).
Okamoto, et al., Determination of reduced and total ubiquinones in biological materials by liquid chromatography with electrochemical detection, J. Chromatogr, 430, 11-19 (1988).
Grossi, et al., Improved high-performance liquid chromatographic method for the determination of coenzyme Q10in plasma. J. Chromatogr., 593, 217-226 (1988).
Edlund, P.O., Determination of coenzyme CoQ10,α-tocopherol and cholesterol in biological samples by coupled-column liquid chromatography with coulometric and ultraviolet detection. J. Chromatogr, 415, 87-97 (1988).
Lagendijk, et al., Measurement of the ratio between the reduced and oxidized forms of coenzyme Q10 in human plasma as a possible marker of oxidative stress, J. Lipid Res, 37, 67-75 (1996).
Yamashita, et al., Simultaneous detection of ubiquinol and ubiquinone in human plasma as a marker of oxidative stress, Anal. Biochem, 250, 66-73 (1997).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method to assay coenzyme Q 10 in blood plasma or blood serum does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method to assay coenzyme Q 10 in blood plasma or blood serum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to assay coenzyme Q 10 in blood plasma or blood serum will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3869701

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.