Nanotechnology-Enabled Phytopharmacology: Advanced Nanocarrier Strategies for Enhancing Bioavailability, Targeted Delivery, and Clinical Translation of Phytochemicals

Abstract

Natural plant-based bioactive phytochemicals have enormous therapeutic potential in multiple diseases, including oncology, inflammation and microbial infections, as well as neurodegenerative diseases. Yet, clinical translation has been heavily hampered by low aqueous solubility, fast hepatic metabolism, chemical instability and low bioavailability as well as insufficient tissue targeting. Nanotechnology-based strategies for the development of phytopharmacology represent a new paradigm in natural product-derived therapeutics by developing innovative nanocarrier platforms such as lipid systems, polymeric nanoparticles, inorganic carriers, and hybrid biomimetics that can circumvent those inherent limitations. Nanocarriers improve the solubility of phytochemicals, and provide controlled or sustained release kinetics, protect bioactive molecules against enzymatic degradation and allow passive / active targeting to disease sites. Advanced formulations like curcumin-loaded PLGA nanoparticles, quercetin-functionalized lipid carriers and pH-responsive delivery systems resulted in significantly improved pharmacokinetic profiles, organ selectivity and therapeutic efficacy in preclinical or clinical studies. Additionally, multifunctional nanoplatforms facilitate co-delivery of various phytochemicals for combination therapy and integration of diagnostic imaging agents for theranostic applications. Despite these progresses, more efforts are still needed to address challenges such as formulation stability, batch-to-batch reproducibility, evaluation of immunogenicity, standardization within regulatory frameworks and economical scale-up. Areas of potential future development include smart and stimuli-responsive nanocarriers, use of artificial intelligence for optimization models, personalized phytopharmacology, and environmentally friendly synthesis approaches. Overall, phytochemical nanomedicines provide a new paradigm for translating the therapeutic potential of natural compounds in bridging traditional herbal medicine with modern precision therapeutics securely and efficiently towards patient-centred treatments.