This paper reviews the recent research and development of the systems of nano-thin layers coated cells for biomedical applications. Polyelectrolyte based nano-thin polymer coatings, due to their individual layered structure and functionalization ability, are a promising part of the systems involving cells for biological processes regulation. The purpose of the layer-by-layer coating technique application is to minimize capsule void volume and separate cells from the host immunological system eliminating immunosuppressive therapy during transplantation. The materials for polyelectrolyte shells and their modifications, followed by the techniques of forming polymer nano-thin coatings are briefly introduced. The enhanced properties of cell nanocoatings are then discussed, involving usability for encapsulation of live cells, immunological barrier, and coatings detection among others. The systems utilizing layer-by layer coatings without cell participation are briefly mentioned. Finally, the perspectives for the future are discussed in terms of limitations and application in biomedicine.

Porenczuk A, Grzeczkowicz A, Maciejewska I, et al. An initial evaluation of cytotoxicity, genotoxicity and antibacterial effectiveness of a disinfection liquid containing silver nanoparticles alone and combined with a glass-ionomer cement and dentin bonding systems.

Wound management is the burning problem of modern medicine, significantly burdening developed countries’ healthcare systems. In recent years, it has become clear that the achievements of nanotechnology have introduced a new quality in wound healing. The application of nanomaterials in wound dressing significantly improves their properties and promotes the healing of injuries. Therefore, this review paper presents the subjectively selected nanomaterials used in wound dressings, including the metallic nanoparticles (NPs), and refers to the aspects of their application as antimicrobial factors. The literature review was supplemented with the results of our team’s research on the elements of multifunctional new-generation dressings containing nanoparticles. The wound healing multiple molecular pathways, mediating cell types, and affecting agents are discussed herein. Moreover, the categorization of wound dressings is presented. Additionally, some materials and membrane constructs applied in wound dressings are described. Finally, bacterial participation in wound healing and the mechanism of the antibacterial function of nanoparticles are considered. Membranes involving NPs as the bacteriostatic factors for improving wound healing of skin and bones, including our experimental findings, are discussed in the paper. In addition, some studies of our team concerning the selected bacterial strains’ interaction with material involving different metallic NPs, such as AuNPs, AgNPs, Fe3O4NPs, and CuNPs, are presented. Furthermore, nanoparticles’ influence on selected eukaryotic cells is mentioned. The ideal, universal wound dressing still has not been obtained; thus, a new generation of products have been developed, represented by the nanocomposite materials with antibacterial, anti-inflammatory properties that can influence the wound-healing process.