The Reality of Active Targeting in Nanomedicine: Promise Versus Performance

Area of Science:

• Nanomedicine
• Biotechnology
• Materials Science

Background:

• Active targeting in nanomedicine uses ligands on nanocarriers for selective binding to biological targets.
• Clinical translation of targeted nanoparticles is limited, with approved systems often using antibodies or passive delivery.

Purpose of the Study:

• To critically examine the gap between active targeting's promise and its practical performance in nanomedicine.
• To highlight limitations in current nanomedicine targeting strategies compared to natural biological systems.

Main Methods:

• Comparative analysis of active targeting in nanomedicine versus natural biological targeting mechanisms.
• Identification of key factors neglected in current nanomedicine targeting approaches.

Main Results:

• Natural targeting involves dynamic, multi-step, energy-dependent processes, unlike simplified ligand-receptor interactions.
• Current nanomedicine approaches oversimplify targeting, ignoring multivalency, spatial organization, kinetics, and biological barriers.

Conclusions:

• Future nanomedicine requires systems-level design integrating spatiotemporal control, adaptive materials, and computational modeling.
• A design-by-architecture paradigm, encoding targeting into nanomaterial structure, is proposed for programmable, biologically guided delivery.