Abstract: Stable, enzymatically triggered chemiluminescent 1,2-dioxetanes with improved water solubility are provided. Dioxetanes further instituted with two or more water-solubilizing groups disposed on the dioxetane structure provide superior performance by eliminating the problem of reagent carryover when used in assays performed on capsule chemistry analytical systems. Compositions comprising a dioxetane with two or more water-solubilizing groups, a non-polymeric cationic surfactant enhancer and optionally a fluorescer, for providing enhanced chemiluminescence are also provided.
Type:
Grant
Filed:
July 31, 1995
Date of Patent:
July 7, 1998
Assignees:
Lumigen, Inc., Board of Governors Wayne State Univ.
Inventors:
Hashem Akhavan-Tafti, Renuka De Silva, A. Paul Schaap
Abstract: A method and composition for treating a Hepatitis B patient having hepatic decompensation utilizes Hepatitis B virus-reducing amounts of T.alpha..sub.1, administered to a patient having decompensated liver disease so as to render the patient seronegative for Hepatitis B virus DNA.
Type:
Grant
Filed:
September 26, 1996
Date of Patent:
May 12, 1998
Assignees:
Alpha 1 Biomedicals, Inc., The Board of Governors of Wayne State Univ.
Abstract: Improved assay methods utilizing stable, enzymatically triggered chemiluminescent 1,2-dioxetanes with improved water solubility are provided. Assays are performed by a capsule chemistry analytical assay method wherein fluid capsules comprising discrete aqueous segments containing either a chemiluminescent dioxetane reagent or an activating agent separated by an oil-based isolating fluid are flowed through a conduit, and subsequently reacted to produce light.The improvement comprises using a dioxetane substituted with two or more water-solubilizing groups disposed on the dioxetane structure to provide the chemiluminescence. Compositions comprising such a dioxetane, a non-polymeric surfactant enhancer and optionally a fluorescer, provide enhanced chemiluminescence and eliminate the problem of reagent carryover when used in assays performed on capsule chemistry analytical systems.
Type:
Grant
Filed:
July 31, 1995
Date of Patent:
May 20, 1997
Assignees:
Bayer Corporation, Board of Governors Wayne State Univ.
Inventors:
Robert F. Adolfsen, Hashem Akhavan-Tafti, Renuka De Silva, A. Paul Schaap
Abstract: Living cells suspensed in a saline buffering media are exposed to microwave radiation without raising the temperature of the cells, to study the non-thermal effects of radiation on the cells, in an apparatus which includes a vertically disposed microwave waveguide having a partitioned end filled with a temperature controlled liquid solution. The sample is contained in a micropipette which projects across the width of the waveguide through the solution. The radiation projected through the waveguide and into the solution is measured.