Ouabain triacetate derivative compounds
US5003054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Aug 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J19/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for performing a diagnostic immunoassay by solid phase separation for digoxin. To a reaction mixture of a test sample and labeled anti-digoxin antibody, which forms a complex of any digoxin present in the test sample, is added a solid phase material having an immobilized ouabain triacetate derivative compound capable of binding any excess labeled antibody. The solid phase material is chosen to rapidly settle whereby a solid and liquid phase is formed. The liquid phase can then be extracted to measure the amount of digoxin-labeled antibody present therein. Ouabain triacetate derivative compounds possess sufficient affinity for anti-digoxin antibodies, and are therefore useful in a solid phase separation based digoxin immunoassay for settling out such antibodies without contributing to undesired background interference. These compounds are also less deleterious to assay performance because of low recognition when leached from the solid phase matrix thereby providing solid phase material with extended shelf life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.