NANOTECHNOLOGY-ENABLED DRUG DELIVERY SYSTEMS FOR TARGETED AND CONTROLLED THERAPEUTIC APPLICATIONS
Abstract
Nanotechnology-enabled drug delivery systems have gained increasing attention as advanced therapeutic platforms for improving targeted delivery, controlled release, and treatment efficacy. This quantitative study evaluated the performance of nanoformulated drug delivery systems in comparison with conventional free-drug formulations. Nanocarriers were prepared using suitable formulation techniques and characterized through measurable physicochemical parameters, including particle size, polydispersity index, zeta potential, drug loading capacity, and encapsulation efficiency. In vitro
release studies were conducted under physiological and acidic conditions to assess controlled and pH-responsive drug release behavior. Biological evaluation was performed to determine cellular uptake, targeting efficiency, cytotoxicity, IC₅₀, apoptosis rate, and intracellular drug accumulation. The optimized nanocarriers showed favorable nanoscale characteristics, acceptable colloidal stability, high encapsulation efficiency, and sustained drug release. Greater drug release under acidic conditions suggested potential usefulness in disease-relevant microenvironments. Drug-loaded nanocarriers demonstrated significantly higher cellular uptake, improved intracellular accumulation, reduced cell
viability, lower IC₅₀ values, and increased apoptosis compared with free-drug treatment. Statistical analysis confirmed significant improvements in release behavior, targeting efficiency, and therapeutic performance. These findings indicate that nanotechnology-enabled drug delivery systems can enhance drug stability, improve controlled release, increase selective cellular uptake, and strengthen therapeutic efficacy. Further in vivo validation and translational assessment are required before broader clinical application.
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