Nanogel; A Comprehensive Review

Nanogels are a class of nanoscale, crosslinked hydrogel particles that have become a versatile substrate for biomedical applications, especially targeted drug and gene delivery. They are ideal for controlled therapeutic release due to their unique blend of high-water content, customizable size, biocompatibility, and responsiveness to physiological stimuli (such as pH, temperature, and redox conditions). Over the past decade, there has been considerable advancement in the design and manufacturing of nanogels using both natural and synthetic polymers, enabling precise control over drug loading, release kinetics, and target selectivity. The purpose of this review article is to briefly portray a comprehensive overview of the current state of nanogel research, with a focus on fabrication methods, physicochemical properties, characterization techniques, and therapeutic applications. Important advancements in multifunctional and stimuli-responsive nanogels are highlighted, with a focus on their applications in regenerative medicine, gene delivery, cancer treatment, and vaccine platforms. Furthermore, the review critically looks into the advantages and limitations of nanogels, including challenges in large-scale production, stability, and regulatory approval. Notwithstanding their great promise, the clinical application of nanogels remains constrained. Ongoing studies in bio responsive materials, smart nanogel systems, and hybrid nanostructures, however, are opening the door for next-generation personalized treatment strategies. Nanogels may become even more clinically relevant when combined with cutting-edge technology like biosensors, nanorobotics, and artificial intelligence. All things considered, nanogels are a vibrant and quickly developing field with a lot of room for precision treatments innovation.