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Pryshchepa, O.* ; Pomastowski, P.* ; Rafińska, K.* ; Gołębiowski, A.* ; Rogowska, A.* ; Monedeiro-Milanowski, M.* ; Sagandykova, G.* ; Michalke, B. ; Schmitt-Kopplin, P. ; Gloc, M.* ; Dobrucka, R.* ; Kurzydłowski, K.* ; Buszewski, B.*

Synthesis, physicochemical characterization, and antibacterial performance of silver-lactoferrin complexes.

Int. J. Mol. Sci. 23:7112 (2022)

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Antibiotic-resistant bacteria pose one of the major threats to human health worldwide. The issue is fundamental in the case of chronic wound treatment. One of the latest trends to over-come the problem is the search for new antibacterial agents based on silver. Thus, the aim of this research was to synthesize the silver-lactoferrin complex as a new generation of substances for the treatment of infected wounds. Moreover, one of the tasks was to investigate the formation mechanisms of the respective complexes and the influence of different synthesis conditions on the features of final product. The batch-sorption study was performed by applying the Langmuir and Freun-dlich isotherm models for the process description. Characterization of the complexes was carried out by spectroscopy, spectrometry, and separation techniques, as well as with electron microscopy. Additionally, the biological properties of the complex were evaluated, i.e., the antibacterial activity against selected bacteria and the impact on L929 cell-line viability. The results indicate the formation of a heterogeneous silver–lactoferrin complex that comprises silver nanoparticles. The complex has higher antibacterial strength than both native bovine lactoferrin and Ag+, while being comparable to silver toxicity.

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