The present invention relates to the use of a control marker for implementing analysis methods on spots, in particular in the context of multiplex analyses. The present invention thus relates to solid supports containing said control marker, their preparation method and their use in analysis methods. The present invention makes it possible to verify the presence, location and/or integrity of the spots at the end of the analysis method, and thus to secure the obtained results while guaranteeing that the yielded result indeed results from a present, intact and localized spot.

The present invention relates to a kit of parts and methods for determining the presence and quantity of one or more TNF-α inhibitor drugs and/or anti-TNF-α inhibitor drug antibodies in one or more biological samples each comprising less than 200 μl, the method comprising the steps of providing a reaction liquid comprising the sample, a first TNF-α conjugate comprising TNF-α and a first conjugated moiety and a second TNF-α conjugate comprising TNF-α and a second conjugated moiety, said second moiety being capable of generating or ameliorating a detectable signal in the presence of a molecular complex comprising a TNF-α inhibitor, followed by detecting the change in signal when the complex between the TNF-α inhibitor drug, the first TNF-α conjugate and a the second TNF-α conjugate forms.

Chromogenic conjugates for color-based detection of targets are described. The conjugates comprise a chromogenic moiety such as a rhodamine, rhodol or fluorescein. The chromogenic moiety is linked to a peroxidase substrate. The chromogenic conjugates can be used in immunohistochemical analysis and in situ hybridization. The conjugates can be used to detect 1, 2, 3 or more targets in a sample by color.

Provided herein are systems and methods for characterizing target/ligand engagement. In particular, luciferase-labeled polypeptide targets are used to detect or quantify target/ligand engagement (e.g., within a cell or cell lysate).

Compounds and methods for use in detecting pregabalin in a sample suspected of containing pregabalin are disclosed. Pregabalin derivatives are described for producing pregabalin conjugates. A pregabalin-immunogenic carrier conjugate may be used as an immunogen for the preparation of an anti-pregabalin antibody. A pregabalin-detectable label conjugate may be used in a signal producing system in pregabalin assays.

The present invention pertains to an enzymatic measurement method using an antibody-enzyme complex or a nucleic acid probe measurement method using an enzyme-labeled nucleic acid probe, in both of which the quantification of a product of a reaction by an enzyme in the antibody-enzyme complex or the enzyme-labeled nucleic acid probe is performed by generating thio-NAD(P)H by an enzymatic cycling reaction using NAD(P)H, thio-NAD(P), and a dehydrogenase (DH), and measuring the amount of the generated thio-NAD(P)H or measuring a change in color caused by the generated thio-NAD(P)H. An enzymatic reaction system in which NAD(P) generated from NAD(P)H by the enzymatic cycling reaction is selectively reduced, is caused to coexist with the enzymatic cycling reaction. The present invention also pertains to a kit for enzyme immunoassay, and a kit for nucleic acid probe measurement. In the enzymatic cycling reaction, the detection sensitivity is increased by increasing the amount of thio-NAD(P)H generated per unit time with respect to a predetermined amount of a substrate (reduced), and combining the same with an enzyme immunoassay, etc., enables quantification, etc., of a protein or nucleic acid with high sensitivity.

Methods, apparatus, systems, and articles of manufacture to make and/or process a diagnostic test device are disclosed. An example apparatus includes a sensor to measure a current between a first electrode and a second electrode of a bioelectrochemical cell coupled to a test zone corresponding to a target analyte on a porous media of a device; a processor to compare the current to a threshold; and when the current is more than the threshold, identify that the target analyte is present in a sample; and an antenna to wirelessly transmit results.

The invention relates to methods, compositions, kits, and assay systems for assay signal amplification. Also provided herein is a signal amplification reagent, wherein the signal amplification reagent is an antibody or antigen-binding fragment thereof.

The present disclosure provides compositions and methods for detecting the presence of neutralizing antibodies in a sample. Unlike conventional assays, the methods provided herein do not require the use of live virus or virus pseudoparticles to identify neutralizing antibodies.

Provided are aggregate alpha-synuclein specific antibodies as well as fragments, derivatives, and variants thereof as well as method related thereto for the early diagnostic and treatment of Parkinson's Disease and other Lewy body- and Lewy neurite-based diseases. Assays, kits, systems, and nanoparticle encapsulated compositions related to the antibodies or fragments, derivatives, and variants thereof are also disclosed.