Abstract
Abstract: Nanostructured lipid carriers (NLCs) offer a breakthrough platform for drug therapy, surpassing traditional limitations and delivering exceptional performance. Among various nanoparticulate systems, lipid nanoparticles stand out as one of the most promising options for medication delivery. NLCs stand out due to their solid matrix at ambient temperatures, setting them apart from conventional lipid-based carriers such as nanoemulsions and solid lipid nanoparticles. This paper thoroughly explores the makeup, classification, components, and various methods of preparing NLCs, based on extensive research findings. It emphasizes their numerous advantages, such as improved stability, minimal toxicity, extended storage capability, increased drug-loading capacity, and compatibility with biological systems. The review provides insights into the advantages and limitations of each method. Exploring the intricacies of drug loading and release, the review also addresses strategies to bolster NLCs’ stability. Moreover, it provides a detailed summary of both laboratory- based and animal studies demonstrating the efficacy of NLCs carrying cytotoxic drugs, particularly emphasizing their promise in targeted drug delivery to the brain. As the next-generation lipid nanocarriers, NLCs are composed of physiological and biocompatible lipids, rendering them novel pharmaceutical formulations. These colloidal drug delivery systems boast a solid lipid matrix with nanosized structures, offering superior drug loading capacity, physical stability, and bioavailability compared to conventional lipid nanoparticles. Several techniques, including high-pressure homogenization, microemulsion, solvent evaporation, and melt emulsification, add to the flexibility of nanostructured lipid carriers. Additionally, their exterior can be altered using coatings such as polyethylene glycol, chitosan, or antibodies to improve targeting ability and stealth characteristics. By elucidating the promising role of NLCs across diverse drug delivery systems, this review stimulates interest in their potential applications. It underscores the significance of understanding the structure, content, multiple formulation procedures, and characterization of NLCs, which are pivotal aspects for establishing stable drug delivery systems.
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