Small Molecule-Based Highly Active and Selective K⁺ Transporters with Potent Anticancer Activities

Area of Science:

• Supramolecular Chemistry
• Membrane Transport
• Medicinal Chemistry

Background:

• Developing small molecule-based ion transporters is crucial for therapeutic applications.
• Existing transporters often lack efficiency or selectivity.
• Novel molecular designs are needed to overcome these limitations.

Purpose of the Study:

• To report a novel class of simple, modular cation transporters.
• To investigate their efficiency and selectivity in ion transport.
• To explore their potential therapeutic applications, including anticancer activity.

Main Methods:

• Synthesis of modular transporters with distinct headgroup, body, and ion-binding foot components.
• Assay of potassium (K+) ion transport efficiency and selectivity across membranes.
• Evaluation of anticancer activity against HeLa and PC3 cancer cell lines.

Main Results:

• The novel transporters efficiently (EC50 = 0.18-0.41 mol %) and selectively (K+/Na+ selectivity = 7.0-9.5) transport K+ ions.
• Transporters A12, B12, and C12 demonstrated potent anticancer activities (IC50 as low as 4.35 ± 0.91 μM).
• Specific crown ether units (18-crown-6) were essential for cation-transporting ability.

Conclusions:

• A new class of simple, modular cation transporters has been discovered.
• These transporters exhibit high efficiency, selectivity, and significant anticancer properties.
• The findings open new avenues for developing small molecule-based therapeutics for ion transport and cancer treatment.