Comparison of highly sensitive, multiplex immunoassay platforms for streamlined clinical cytokine quantification.

Introduction: Selecting the optimal platforms to quantitate cytokines is challenging due to varying performance and the plethora of options available.

Aims: To compare performance of three highly sensitive, multiplex assays on three different platforms - MSD S-plex, Olink Target 48, and Quanterix SP-X - to MSD V-plex which is widely used for quantitative cytokine assay.

Methods: Serum and stimulated plasma samples were analyzed across each platform.

Screening Non-neutralizing Anti-idiotype Antibodies Against a Drug Candidate for Total Pharmacokinetic and Target Engagement Assay.

Non-neutralizing anti-idiotype antibodies against a therapeutic monoclonal antibody (mAb) play a crucial role in the creation of total pharmacokinetic (PK) assays and total target engagement (TE) assays during both pre-clinical and clinical development. The development of these anti-idiotype antibodies is challenging. In this study, we utilized a hybridoma platform to produce a variety of anti-idiotype antibodies against GSK2857914, a humanized IgG1 anti-BCMA monoclonal antibody.

Orthogonal quantification of soluble inducible T-cell costimulator (ICOS) in healthy and diseased human serum.

Inducible T-cell costimulator (ICOS), a homodimeric protein expressed on the surface of activated T-cells, is being investigated as a potential therapeutic target to treat various cancers. Recent studies have reported aberrant increases in the soluble form of ICOS (sICOS) in human serum in disease-state patients, primarily using commercial ELISA kits. However, results from our in-house immunoassay did not show these aberrant increases, leading us to speculate that commercial sICOS ELISAs may be prone to interference.

A pilot study evaluating GSK1070806 inhibition of interleukin-18 in renal transplant delayed graft function.

Introduction: Delayed graft function (DGF) following renal transplantation is a manifestation of acute kidney injury (AKI) leading to poor long-term outcome. Current treatments have limited effectiveness in preventing DGF. Interleukin-18 (IL18), a biomarker of AKI, induces interferon-γ expression and immune activation.