Method for replacing biomarkers of protein kinetics from tissue samples by biomarkers of protein kinetics from body fluids after isotopic labeling in vivo
US9134319B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 13, 2014 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2800/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided herein are method for measuring the rate of synthesis, breakdown, transport, or other kinetic parameters of a protein in a tissue of medical interest, without requiring physical sampling of the tissue, by a measurement of the protein in a body fluid. Methods may include selecting one or more target proteins in a tissue; administering an isotope-labeled molecule to a subject for a period of time sufficient for said isotope-labeled molecule to enter into and label the one or more target proteins to produce one or more isotope-labeled target proteins; collecting a volume of a body fluid, wherein the volume comprises one or more isotope-labeled target proteins that escaped or were released from the tissue; enriching or isolating the one or more isotope-labeled target proteins from the volume; performing a mass spectrometric measurement of the isotopic content, rate of incorporation, and/or pattern or rate of change in isotopic content and/or pattern of isotope labeling of the one or more enriched or isolated isotope-labeled target proteins; and calculating at least one kinetic parameter of the one or more enriched or isolated isotope-labeled target proteins, where the kinetic …
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