Mouse Histamine ELISA Kit (KTE71604) — FAQ for Allergy, Anaphylaxis, and Mast Cell Researchers

Mouse Histamine ELISA Kit: Your Questions Answered

Histamine is a 111-Da imidazole amine — one of the smallest immunogenic targets you will ever measure [reference:32]. It is the canonical mediator of Type I hypersensitivity, released within minutes from activated mast cells and basophils, and it drives anaphylaxis, airway hyperresponsiveness, eosinophilia, and allergen-specific IgE production [reference:33]. In mouse OVA-anaphylaxis models, serum histamine is the primary readout of mast cell degranulation and a key endpoint for anti-allergic drug efficacy.

But histamine is also the analyte most likely to give you a falsely low result — and the two culprits have nothing to do with your model.

Why is my OVA-anaphylaxis serum histamine 60% lower than published values?

Two silent variables are degrading your signal before the plate is read [reference:34].

First: endogenous diamine oxidase (DAO). Mouse plasma, serum, and every tissue lysate contain DAO that chews through free histamine in under 5 minutes at room temperature [reference:35]. If you did not spike your collection tube with a DAO inhibitor (aminoguanidine/EDTA) before the first spin, you have already lost 30–50% of your analyte [reference:36].

Second: "universal" kit cross-talk. Histamine is a hapten — it must be BSA-conjugated for both coating and HRP labeling. Most "universal mammalian" kits use human-serum-optimized conjugation and antibody pairs that lose 30–50% signal in mouse matrices due to different albumin isoforms and lipid loads [reference:37].

The Mouse Histamine ELISA Kit (KTE71604) from Abbkine is validated for mouse matrices with built-in DAO-inhibitor-compatible protocols — closing both gaps [reference:38].

What is the detection principle of this histamine ELISA kit?

The kit uses a competitive ELISA format: histamine-BSA coating, histamine-HRP conjugate, and a validated anti-histamine antibody. Sample histamine competes with the HRP-conjugate for antibody binding — signal is inversely proportional to histamine concentration [reference:39].

What is the sensitivity and detection range?

Does this kit cross-react with antihistamines or histamine metabolites?

<0.1% cross-reactivity with methylhistamine and common antihistamines (cetirizine, diphenhydramine) — so your drug-treated cohorts do not read artifactually low [reference:43]. This is critical because methylhistamine is the primary DAO metabolite and accumulates when DAO is active.

How should I collect and handle samples to preserve histamine?

DAO inhibition is non-negotiable. The KTE71604 protocol includes DAO-inhibitor-compatible collection guidance:

• Serum/plasma: Collect into tubes pre-spiked with aminoguanidine or EDTA; separate within 15 minutes at 4°C
• Tissue lysates: Homogenize in ice-cold buffer containing a DAO inhibitor
• BALF: Add protease/DAO inhibitor cocktail immediately
• Avoid repeated freeze-thaw cycles; histamine degrades with each cycle

What applications is this kit suitable for?

This kit is designed for research use only. Applications include:

• IgE-mediated anaphylaxis (OVA/PCA/ASA models) [reference:44]
• Mast cell degranulation and MRGPRX2 activation studies [reference:45]
• Asthma and allergic airway inflammation (BALF histamine) [reference:46]
• Food allergy and atopic dermatitis models
• Histamine H1–H4 receptor pharmacology and antihistamine efficacy testing [reference:47]
• Enterochromaffin-like (ECL) cell biology and gut-brain axis research [reference:48]

What's included in the kit?

A complete, ready-to-use kit validated for mouse matrices.

📌 Reference Link: Mouse Histamine ELISA Kit — KTE71604