In an increasingly aging society, there is a growing demand for the development of technology related to tissue regeneration. It involves the development of the appropriate biomaterials whose properties will allow the desired biological response to be obtained. Bioactivity is strongly affected by the proper selection of active ingredients. The aim of this study was to produce bioactive hydrogel materials based on hyaluronic acid and collagen modified by the addition of placenta. These materials were intended for use as dressings, and their physicochemical properties were investigated under simulated biological environmental conditions. The materials were incubated in vitro in different fluids simulating the environment of the human body (e.g., simulated body fluid) and then stored at a temperature close to body temperature. Using an FT-IR spectrophotometer, the functional groups present in the composites were identified. The materials with the added placenta showed an increase in the swelling factor of more than 300%. The results obtained confirmed the potential of using this material as an absorbent dressing. This was indicated by pH and conductometric measurements, sorption, degradation, and surface analysis under an optical microscope. The results of the in vitro biological evaluation confirmed the cytosafety of the tested biomaterials. The tested composites activate monocytes, which may indicate their beneficial properties in the first phases of wound healing. The material proved to be nontoxic and has potential for medical use.

BioMedChem Doctoral School of University of Lodz and Institutes of the Polish Academy of Sciences University of Lodz Matejki 21 23 90 237 Łódź Poland

Department of Analytical Chemistry Faculty of Natural Sciences Comenius University Ilkovicova 6 842 15 Bratislava Slovakia

Department of Chemical Biology Faculty of Science Palacky University Olomouc Slechtitelu 27 783 71 Olomouc Czech Republic

Department of Immunogenetics Medical University of Lodz ul Pomorska 251 A4 92 213 Łódź Poland

Department of Immunology and Infectious Biology Faculty of Biology and Environmental Protection University of Lodz Banacha 12 16 90 237 Łódź Poland

Department of Materials Science Faculty of Materials Engineering and Physics Cracow University of Technology 37 Jana Pawła 2 Av 31 864 Krakow Poland

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