Abstract
The aim of this study was to analyse the effect of cold atmospheric plasma (CAP) on human osteoblast-like cells in vitro. Additionally, underlying intracellular mechanisms were to be studied. Human osteoblast-like (MG63) cells were exposed to CAP for 60 s. The effects of CAP on key molecules essential for the wound healing response were studied using real-time PCR, ELISA and immunocytochemistry. For studying intracellular signalling pathways, MAP kinase MEK 1/2 was blocked. Cell viability was analysed by an XTT assay and with an EVE automated cell counter. Cell migration was examined by an in vitro wound healing assay.CAP exposition on osteoblast-like cells caused a significant upregulation of interleukin (IL)-1β, IL-6, IL-8, tumor necrosis factor (TNF)α, cyclooxygenase (COX)2, collagen (COL) 1α, matrix metalloproteinase (MMP)1, Ki67, proliferating-cell-nuclear-antigen (PCNA) and chemokine ligand (CCL)2 mRNA expression at 1 day. Interestingly, after blocking of MAP kinase, CAP-induced upregulation of Ki67 was inhibited by 57%. Moreover, CAP treatment improved significantly osteoblast-like cell viability as compared to untreated cells at 1 day. Beneficial effect of CAP treatment was shown by an in vitro wound healing assay, displaying a significant faster wound closure. Our findings provide evidence that CAP exposure effects gene and protein regulation in human osteoblast-like cells. Furthermore, CAP treatment has a positive impact on wound closure in an in vitro setting and might improve existing concepts of hard tissue regeneration in the future.
Highlights
The healing post-operative process after oral surgery interventions include the repair and regeneration of soft and hard tissues [1,2,3]
We observed a significant upregulation of mRNA expression of TNFα and COX2 after cold atmospheric plasma (CAP) application, both being well known as important genes for primary inflammation phase concerning wound healing (Fig. 1b)
Since the hard tissue remodelling process is associated with matrix metalloproteinases, we analysed MMP1 gene expression after CAP treatment
Summary
The healing post-operative process after oral surgery interventions include the repair and regeneration of soft and hard tissues [1,2,3]. The healing of hard tissue is a major step for the entire regeneration of an affected area, forming its stabilizing scaffold. Bone tissue healing is a multifactorial process involving various cell types such as osteoblasts and osteoclasts as well as different immune cells [5, 6]. The regeneration process, which can be divided into different stages, is initiated by tissue damage, followed by a local immune reaction, which plays a significant role in the entire process of wound healing [7, 8]. During the inflammation process following the traumatic stimulus immediately a large
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
