Overview
Cy3-labeled ivermectin is a research reagent combining the antiparasitic drug ivermectin with the cyanine-based Cy3 fluorophore. This conjugate enables real-time tracking of ivermectin's cellular uptake and distribution while maintaining pharmacological activity. The modification typically occurs at ivermectin's hydroxyl group without significantly altering its binding affinity to glutamate-gated chloride channels. Primarily used in academic and pharmaceutical research, this fluorescent derivative addresses questions about drug transport mechanisms, tissue penetration, and target engagement. Its development represents a convergence of medicinal chemistry and molecular imaging techniques, offering insights that unlabeled ivermectin cannot provide.
Physical and Chemical Properties
The compound exhibits characteristic Cy3 fluorescence with excitation/emission maxima around 550/570 nm, suitable for standard TRITC filter sets. Its spectral properties are pH-stable in physiological ranges, though extreme pH may degrade the dye. The conjugation increases molecular weight by approximately 500 Da compared to native ivermectin. Solubility requires organic solvents like DMSO for stock solutions, which can then be diluted in aqueous buffers. The lyophilized form typically has ≥2 years stability when properly stored, while working solutions remain stable for weeks at 4°C when protected from light. Users should confirm batch-specific molar extinction coefficients for quantitative applications.
Main Applications
In neuroscience research, Cy3-ivermectin visualizes drug penetration across the blood-brain barrier using confocal microscopy. Veterinary researchers employ it to study parasite membrane interactions, leveraging fluorescence to distinguish bound vs. unbound drug fractions. The pharmaceutical industry utilizes this conjugate in high-content screening systems to quantify cellular uptake kinetics. Recent applications include investigating ivermectin's potential antiviral mechanisms, where fluorescence helps localize drug accumulation in virus-infected cells. Compared to radioactive labeling, Cy3 offers safer handling and eliminates disposal complications.
Safety and Storage
As a modified pharmaceutical compound, Cy3-ivermectin requires handling under biosafety level 1 or 2 conditions depending on the experimental system. Although less toxic than many fluorescent labels, it may still cause eye/skin irritation and should not be ingested. Long-term storage demands desiccated conditions at -20°C, with aliquoting recommended to avoid freeze-thaw cycles. Shipping typically occurs on dry ice for international orders. Decomposition manifests as color change (darkening) or precipitation. Material safety data sheets should be consulted for specific disposal regulations in the user's jurisdiction.
B2B Procurement Guide
Research-grade Cy3-ivermectin is available through specialized biochemical suppliers and custom synthesis companies. Key procurement considerations include: 1) Conjugation ratio (typically 1:1 dye:drug), 2) HPLC purity (>90% preferred), and 3) availability of quality control data (mass spec, absorbance spectra). Bulk purchases (10+ mg) may qualify for volume discounts. Lead times range from 2-6 weeks for custom syntheses. Some suppliers offer formulation services (e.g., sterile filtration, specific salt forms). Buyers should confirm import regulations, as some countries restrict ivermectin derivatives. Certificates of analysis are essential for reproducibility in published research.
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