ABSTRACT
INTRODUCTION: The aim of this study was to evaluate polyasparagine (PAA), a new, promising scaffold. PAA was compared with alginate, which is used in cell transplantations and may be regarded as a standard. MATERIALS AND METHODS: In vitro cell viability on both scaffolds was assessed. C57B1 mice were injected s. c. alginate or PAA with or without 3T3 cells. After two months specimens from sites of injection were examined and blood samples were taken for enzymatic activity estimation. Cathepsin D activity and alpha1-antitrypsin levels were measured. RESULTS: In vitro cell viability was lowest on PAA and highest in control group. Increase in levels of enzymes measured was observed in response to PAA and alginate and was lower in case of polymer seeded with cells. Increase in alpha1-antitrypsin levels was lower in case of PAA in comparison to alginate. Scaffold degradation in histopathological specimens was visible. CONCLUSION: The results indicate that PAA implants undergo biodegradation and nonspecific inflammatory response is comparable to alginate.
Subject(s)
Cell Culture Techniques/methods , Materials Testing , Peptides , Tissue Scaffolds , 3T3 Cells/metabolism , 3T3 Cells/pathology , Alginates , Animals , Cathepsin D/metabolism , Cell Proliferation , Cell Survival , Cells, Cultured , Glucuronic Acid , Hexuronic Acids , Mice , Mice, Inbred C57BL , Trypsin/metabolismABSTRACT
Staphylococcin T (StT) is a bacteriocin, which can serve as an antibiotic. The influence of StT on the mammalian cells viability should be examined before its possible applications. The aim of this work was to study the influence of StT on mouse fibroblasts viability in vitro. StT was delivered as a deposit in agar. 3T3 fibroblasts were used in viability tests. Cells were incubated with StT for 24 and 48 h. In the first controls, cells grew without the agar block, in the second controls, the agar block contained no StT. Trypan blue exclusion test was performed. Growth inhibition of sensitive strain SAU-209P was observed after 24 h incubation with cell culture medium containing StT. Antimicrobial activity of StT in culture medium was confirmed even after 2 months. The viability of 3T3 cells in the second control group was 50% lower than in the first and 25% higher than in StT treated group during the first day. It was noticed mechanical damage of growing cells caused by agar blocks. The number of cells cultured with StT was similar to that of second control group after 2 days. There were no changes in morphology of cells in all groups. It follows that StT had unimportant influence on the fibroblasts (3T3) viability in culture. StT may be considered for future animal trails.
