Significant progress has been achieved in the first year of the BIOACTION project. This includes the selection of polymers or peptides for the development of bio-hydrogels based on their mechanical properties, bioactivity, biocompatibility and stability. Formulations for injectable hydrogels and for implant coatings were selcted. Additionally, work started on preparing lipid-based liposomes with a two-faced outer shell containing lipoplexes for engineering bacteria. Furthermore, we started the genetic engineering of biological carriers (Bacteriophages- BPs) to transform biofilm-associated bacteria for specific protein production. We have collected BPs targeting specific bacteria in the biofilm and assess protocols for optimal growth and infection. The safety of both neat and composite injectable hydrogels was evaluated in terms of cell viability and proliferation which leads the pathway for future assessment of the in vitro and in vivo efficacy BIOACTION hydrogels.
During RP2, BIOACTION advanced the development of next-generation biomaterials by creating injectable bio-hydrogels, enriched with osteoinductive signals to support bone regeneration. In parallel, synthetic peptide hydrogels—with and without added osteogenic components—were produced and fully characterized, demonstrating their ability to promote cell proliferation, osteogenic differentiation, and angiogenesis. BIOACTION also achieved the successful loading of these hydrogels with its biological carriers. Hydrogels containing multicompartment Janus liposomes (MJL) showed no cytotoxic effects, while bacteriophage-loaded hydrogels efficiently released infective phages capable of targeting bacteria. Ongoing studies are now investigating the in vitro transfection efficiency of these innovative delivery systems, while in vivo models for dental and orthopedic applications were established and will soon start.
