Antibody System Anti-Insulin Glargine hIgG ELISA Kit

Principle of the Assay

This assay utilizes a high-performance, solid-phase quantitative indirect enzyme immunoassay technique to measure target human IgG anti-drug antibody levels:

• Target Capture: Recombinant Insulin Glargine is uniformly pre-coated onto the solid-phase surface of a 96-well microplate.

• Specific Binding: Calibrated standards or unknown biological samples are pipetted into the microwells. Endogenous Anti-Insulin Glargine hIgG antibodies present in the sample are bound and securely immobilized by the pre-coated protein matrix.

• Secondary Detection: Unbound matrix elements are removed via a thorough wash cycle. A biotin-labeled Mouse Anti-Human IgG monoclonal secondary antibody is introduced into the wells, binding selectively to the captured human IgG target fractions.

• Enzyme Complexing: Following another wash step to clear away unbound secondary antibodies, Streptavidin conjugated to Horseradish Peroxidase (Streptavidin-HRP) is added, anchoring specifically to the biotinylated domains.

• Signal Amplification and Readout: After a final wash to remove excess enzyme reagent, a colorimetric substrate solution is added to initiate enzymatic signal development. Because this is an indirect sandwich configuration, the resulting color intensity develops in direct proportion to the concentration of Anti-Insulin Glargine hIgG bound in the initial step. The reaction is terminated with a stop solution, and absorbance is quantified spectrophotometrically.

Key Features and Performance Metrics

• Ultra-Sensitive Detection Capability: Exhibits an exceptional analytical sensitivity down to 2.82 ng/mL, facilitating the early tracking of trace human IgG anti-drug antibody formations.

• High-Resolution Quantitative Range: Delivers a refined linear tracking range from 3.13 ng/mL to 200 ng/mL, optimized for the highly accurate profiling of precise, low-level antibody titers.

• Exceptional Intra-Assay Precision: Demonstrates outstanding target reproducibility with a Coefficient of Variation (CV) of less than 10 percent, validated through sixteen separate replicate evaluations across three samples of known concentration on a single test plate.

• Outstanding Inter-Assay Uniformity: Confirms high day-to-day and batch-to-batch experimental reliability with a CV of less than 15 percent, verified across twenty-four distinct assay runs using three independent reference concentration samples.

Technical Specifications

• Catalog No.: KAB94002

• Assay Configuration: Quantitative Indirect Enzyme Immunoassay

• Targeted Biomarker: Anti-Insulin Glargine Human IgG (hIgG ADA)

• Validated Matrices: Serum and Plasma

• Assay Range: 3.13 to 200 ng/mL

• Analytical Sensitivity: 2.82 ng/mL

• Solid-Phase Target: Recombinant Insulin Glargine

• Detection Layer: Biotinylated Mouse Anti-Human IgG / Streptavidin-HRP

Applications and Workflow Summary

This indirect ELISA platform is highly optimized for therapeutic drug immunogenicity monitoring, biosimilar validation, and longitudinal humoral response profiling. Investigators should observe the following guidelines:

• Dilution and Layout: Unknown serum or plasma matrices must be screened alongside the provided reference standards. Samples exhibiting target concentrations exceeding the maximum range of 200 ng/mL must be diluted empirically in standard assay matrix buffer prior to running the assay.

• Analysis Requirements: To achieve absolute quantification accuracy, investigators must generate a standard curve simultaneously during every plate run, plotting standard absorbance profiles against log-transformed concentration values.

Handling, Stability and Storage

• Kit Shipping: Distributed under secure, temperature-controlled conditions on blue ice or chilled gel packs to preserve protein matrix and enzyme binding configurations.

• Operational Stability: Built with high-grade components to guarantee consistent, low-decay signal retention over a standard six-month framework when kept at the manufacturer-specified storage parameters.

• Storage Guidance: Keep the complete kit stored strictly at the recommended refrigeration temperature upon receipt. Ensure that unused microplate wells remain sealed within their original desiccant pouch to guard against moisture compromise.