Methods are disclosed for determining minute quantities of an analyte in a medium suspected of containing the analyte. One method comprises treating a medium suspected of containing an analyte under conditions such that the analyte, if present, causes a substrate having an oxidant cleavable linker and a photosenstizer to come into close proximity. The photosenstizer generates singlet oxygen which oxidatively cleaves the linker to form a product which can be detected in a sandwich detection assay such as LOCI. The amount of product detected is related to the amount of analyte in the medium. Compositions, kits, and compounds are also disclosed.
Methods are disclosed for determining an analyte in a medium suspected of containing the analyte.
One method comprises treating a medium suspected of containing an analyte under conditions such that the analyte; if present, causes a photosensitizer and a chemiluminescent compound to come into close proximity. The photosensitizer generates singlet oxygen and activates the chemiluminescent compound when it is in close proximity. The activated chemiluminescent compound subsequently produces light. The amount of light produced is related to the amount of analyte in the medium. Preferably, at least one of the photosensitizer and chemiluminescent compound is associated with a surface which is usually a suspendible particle, and a specific binding pair member is bound thereto.
Another method comprises providing (1) a medium suspected of containing the analyte, (2) a label reagent comprising a first specific binding pair (sbp) member associated with a photochemically activatable chemiluminescent compound wherein the first sbp member is capable of binding to the analyte or to a second sbp member to form a complex related to the presence of the analyte. This method further comprises photochemically activating the chemiluminescent compound. The amount of luminescence generated by the chemiluminescent compound is detected. The amount thereof is related to the amount of analyte in the medium.
Compositions and kits are also disclosed.
Methods are disclosed for determining an analyte in a medium suspected of containing the analyte.
One method comprises providing in combination (1) a medium suspected of containing an analyte; (2) a label reagent comprising a suspendible particle and a first specific binding pair (sbp) member associated with a photochemically activatable chemiluminescent compound (PACC), wherein said first sbp member is capable of binding to said analyte or to a second sbp member, wherein said second sbp member is capable of binding to said analyte; and (3) an intrinsically metastable species capable of diffusing in said medium and of reacting preferentially with said PACC when said PACC is brought into close proximity to said species by virtue of the presence or absence of said analyte; and determining whether said intrinsically metastable species has reacted with said PACC, the reaction thereof being related to the amount of analyte in said medium.
Chemiluminescent and fluorescent substrate pads and uses thereof
申请人:PIERCE BIOTECHNOLOGY, INC.
公开号:US10722882B2
公开(公告)日:2020-07-28
The disclosure provides compositions, kits and methods comprising an absorbent pad comprising a fibrous material and a liquid formulation comprising a luminescent substrate for identifying and quantifying biomolecule analytes.
Novel stabilized formulations for chemiluminescent assays
申请人:——
公开号:US20010046688A1
公开(公告)日:2001-11-29
A substrate having an extended shelf life for chemiluminescent detection and assaying is useful with enzyme-based probes as well as for immunoassays, DNA or RNA or protein detection and blotting. The substrate is a mixture of (a) a chemiluminescent compound, (b) an oxidant, (c) a stabilizer and (d) a buffer. The substrate may further include a chemiluminescent enhancer and a solubilizer. The substrate may be in an organic solvent or may be aqueous based.