HAMA Interference Kit – Research Use Only

HAMA Interference Kit is a specialized set of six samples (NS and PS1–PS5) designed to evaluate and characterize interference caused by Human Anti-Mouse Antibodies (HAMA) in immunoassays. HAMA can bridge capture and detection antibodies (especially mouse-derived monoclonals), generating false-positive signals or elevated baselines in sandwich and bridging formats. This kit provides controlled levels of interference for assay validation, blocking reagent testing, and platform performance assessment.

Scientific Overview

Human Anti-Mouse Antibodies (HAMA) are heterophilic antibodies that can develop in patients exposed to mouse proteins (e.g., through monoclonal antibody therapy or diagnostic reagents). In sandwich immunoassays, HAMA can bridge capture and detection antibodies, producing false-positive or falsely elevated results. This interference is a well-recognized source of error in clinical chemistry, especially in assays using murine monoclonal antibodies.

The HAMA Interference Kit is suitable for:

• Evaluating HAMA susceptibility in new or existing immunoassays
• Testing the effectiveness of HAMA blocking reagents
• Validating assay robustness across different platforms and matrices
• Investigating bridging interference in sandwich and competitive formats
• Quality control and troubleshooting of false-positive results in clinical research

Usage & Handling Guidance

Store the kit at –20 °C. Thaw samples on ice or at 2–8 °C and mix gently before use. Aliquot upon first thaw to avoid repeated freeze–thaw cycles. Use the provided samples (NS = negative sample; PS1–PS5 = positive samples with increasing HAMA levels) directly or spiked into your assay matrix according to your validation protocol.

• Recommended applications: Immunoassay validation, HAMA blocking studies, and interference troubleshooting
• Protocol tip: Test each sample in parallel with your standard curve and quality controls to quantify the degree of interference
• Stability: Stable when stored frozen; avoid repeated freeze–thaw cycles

What You Get

• 1 complete HAMA Interference Kit containing 6 samples (NS + PS1–PS5)
• Controlled levels of HAMA interference for comparative analysis
• Ready-to-use format for direct spiking into assay matrices
• Essential tool for assay developers, QC teams, and researchers using mouse-derived antibodies
• For research use only (RUO)

Why Researchers Choose It

• Simulates real-world HAMA interference across multiple concentration levels
• Enables systematic evaluation of assay robustness and blocking strategies
• Helps identify and mitigate false-positive or elevated results in sandwich immunoassays
• Supports validation of platforms using murine monoclonal antibodies in human samples
• Convenient kit format with stable frozen samples for reproducible testing

Frequently Asked Questions (FAQ)

• What is HAMA and why does it interfere?
  Human Anti-Mouse Antibodies (HAMA) can bridge capture and detection antibodies in sandwich immunoassays, causing false-positive or falsely elevated signals.
• What do the samples NS and PS1–PS5 represent?
  NS is a negative (non-interfering) sample; PS1–PS5 contain increasing levels of HAMA interference for dose-response evaluation.
• How should the samples be used?
  Spike the provided samples into your assay matrix or run them in parallel with your standard curve to quantify interference.
• Can this kit be used with any immunoassay platform?
  Yes. It is compatible with most sandwich and bridging immunoassay formats that use mouse-derived antibodies.
• What storage conditions are required?
  Store at –20 °C and avoid repeated freeze–thaw cycles. Aliquot upon first thaw.

References

• Reinsberg J. Different efficacy of various blocking reagents to eliminate interferences by human antimouse antibodies with a two-site immunoassay. Clin Biochem. 1996 Apr;29(2):145-8.
• Bolstad N, Warren DJ, Nustad K. Heterophilic antibody interference in immunometric assays. Best Pract Res Clin Endocrinol Metab. 2013 Oct;27(5):647-61.
• Lippi G, Aloe R, Meschi T, Borghi L, Cervellin G. Interference from heterophilic antibodies in troponin testing. Case report and systematic review of the literature. Clin Chim Acta. 2013 Nov 15;426:79-84.
• Kawasaki H, Suzuki T, Ito K, Takahara T, Goto-Inoue N, Setou M, Sakata K, Ishida N. Minos-insertion mutant of the Drosophila GBA gene homologue showed abnormal phenotypes of climbing ability, sleep and life span with accumulation of hydroxy-glucocerebroside. Gene. 2017 May 30;614:49-55.
• Hull B. Aberrantly elevated TSH level due to human anti-mouse antibodies (HAMA) interference with thyrotropin assay. J S C Med Assoc. 2012 Feb;108(1):12-3.
• Degn SE, Andersen SH, Jensen L, Thiel S, Jensenius JC. Assay interference caused by antibodies reacting with rat kappa light-chain in human sera. J Immunol Methods. 2011 Sep 30;372(1-2):204-8.