Smart Nanoplatform with Self-Stimulation Strategy for Dynamic Regulation and In Situ Visual Imaging of Histamine...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Allergy Research

Background:

• Allergic rhinitis (AR) is a histamine-driven inflammatory condition affecting the upper airways.
• Histamine is a key mediator in the allergic rhinitis cascade, influencing symptoms like sneezing and itching.
• Current AR treatments lack integrated monitoring and dynamic drug release capabilities.

Purpose of the Study:

• To develop a smart nanoplatform for simultaneous in situ visual monitoring of histamine and dynamic drug delivery for AR.
• To create a system capable of long-term, low-dose treatment of histamine-mediated allergic rhinitis.
• To investigate a novel approach for respiratory allergy intervention.

Main Methods:

• Design of a nanoplatform using mesoporous silica nanoquenchers (qMSNs) loaded with antihistamine Ketotifen (KT).
• Sealing qMSNs with dye-labeled histamine aptamers for specific histamine binding and fluorescence restoration.
• Characterization of drug-loading capacity, histamine detection limit, and drug release kinetics.
• Evaluation of the nanoplatform in vivo using an AR mouse model for intranasal histamine imaging.

Main Results:

• The nanoplatform demonstrated high drug-loading capacity and an ultralow histamine detection limit (2.49 nM).
• Sustained release of Ketotifen was achieved, dependent on histamine concentration.
• The system successfully visualized intranasal histamine levels in AR model mice.
• Dual inhibition of histamine receptors by the aptamer and Ketotifen was confirmed.

Conclusions:

• The developed nanoplatform enables visual detection of histamine and dynamic, low-dose drug delivery for AR.
• This system provides an effective, long-interval treatment strategy for histamine-mediated AR inflammation.
• The smart nanoplatform shows potential for widespread application in respiratory allergy intervention.