Spiroadamantane dioxetane substrates--stable labels for luminescence-enhanced enzyme immunoassays.

This short communication describes the use of spiroadamantane-1,2 dioxetane substrates for alkaline phosphatase and beta-D-galactosidase in the development of luminescence-enhanced enzyme immunoassays. Until the present work, only peroxidase-luminol/peroxidase systems had been used in such assays. The light reaction kinetics were studied from the time of initiation of the light reaction up to 2 days later. The methods is illustrated by the determination of myeloperoxidase, based on microtitre plate technology, coupled with a microtitre plate luminometer which needs no injector. The alkaline phosphatase and peroxidase systems were compared.