Pyridinium crosslinks assay
US6716593B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2000 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jan 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/975
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method for measuring a level of pyridinoline and/or deoxypyridinoline in a sample. In the method, a non-hydrolyzed sample containing one or more peptide-bound collagen pyridinium crosslinks selected from the group consisting of pyridinoline, deoxypyridinoline, or both, is contacted with a protease reagent under conditions effective for the protease reagent to cleave the crosslinks from attached collagen amino acids and peptides, so that peptide-bound forms are converted to native, peptide-free pyridinoline and deoxypyridinoline. After proteolysis, the level(s) of native, peptide-free pyridinoline and/or deoxypyridinoline are measured. Preferably, proteolysis is effective to ensure that at least 80% of total pyridinium crosslinks are present as the native, peptide-free forms. The method is particularly useful in screening or monitoring collagen degradation activity. Kits and reagents for use in the method are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.