Abstract
Injectable hydrogels, commonly utilized as dermal fillers, show great potential for increasing tissue volume and correcting wrinkles. HA (hyaluronic acid), extensively used in dermal fillers, requires considerable modifications to meet commercial demands for effectiveness and functionality. PDRN (polydeoxyribonucleotides), DNA extracted from salmon sperm cells, offer several therapeutic benefits, including anti-inflammatory and collagen stimulation. This work presents a new crosslinked hydrogel based on HA and PDRN. HA-PDRN crosslinked hydrogels were fabricated via covalent interactions between the carboxyl groups of HA and amino groups of PDRN, resulting in desirable properties such as viscoelasticity, appearance, hydration, degradation, injectability, and biocompatibility. In vivo studies on mice revealed that these hydrogels maintain volume for over 24 weeks, with reduced inflammation and enhanced collagen synthesis, as well as exhibiting durability, safety, and supportability.
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