Polyelectrolyte-based Hydrogels for Biomedicine

Hydrogels have a three-dimensional structure of polymer chains composed of hydrophilic end groups. The aim of this review is to show how polyelectrolytes have emerged as a promising and innovative toolkit for delivering and targeting therapeutic bioactive substances. Also, here the most relevant contributions related to hydrogel systems based on polyelectrolytes are presented, highlighting of these systems their main characteristics for applications in biomedicine.