Matrix-Based Hydrogels in Biomedical Applications: Design, Functionality, and Translational Insights

Hydrogels, defined as three-dimensional hydrophilic polymeric networks, have emerged as indispensable materials in drug delivery systems owing to their ability to encapsulate and release therapeutic agents in a controlled manner. Their structural characteristics closely mimic those of biological tissues, thereby enhancing biocompatibility and minimizing adverse systemic effects. Hydrogels can be engineered to respond to diverse physiological stimuli, such as pH and temperature, consequently facilitating the targeted release of drugs tailored to specific pathologies. Various crosslinking techniques, including physical and chemical methods, influence the mechanical stability and responsiveness of these materials, enabling advancements in applications ranging from tissue engineering to minimally invasive surgeries. Recent innovations include hybrid synthesis techniques that combine distinct crosslinking methods to augment the functional performance and customization of hydrogels. Furthermore, integrating biosensors and computational design methods into hydrogel frameworks holds promise for the development of autonomous systems capable of real-time therapeutic adjustments. In this review, we focus on the latest advancements in hydrogel design, with an emphasis on crosslinking strategies, stimulus-responsive mechanisms, and their integration into emerging biomedical applications. By synthesizing current research, we highlight the transformative potential of hydrogels in personalized medicine and their roles in addressing diverse clinical challenges.