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• W3135362102 abstract "Reactive species play an essential role in orchestrating wound healing responses. They act as secondary messengers and drive redox-signaling pathways that are involved in the hemostatic, inflammatory, proliferative and remodeling phases of wound healing. Cold plasma produces a profusion of short- and long-lived redox species that promotes wound healing, however, until today, the knowledge of CAP mediated wound healing remained scarce. In this thesis, CAP mediated wound healing mechanism and their effect on extracellular matrix and adhesion molecules have been investigated. To this end, a keratinocyte cell line (HaCaT), skin fibroblast cell line (GM Fbs) and an in vitro coculture model including both HaCaT and GM Fbs at a 2:1 ratio, were employed to investigate the cross talk between these two skin cell types.We examined the impact of CAP on extracellular matrix proteins and cell adhesion molecules in GM Fbs and observed a significant impact of cold plasma treatment on the expression level of collagen moieties, cell adhesion molecule like integrin, cadherin, versican, MMPs as well as extracellular matrix proteins.Moreover, scratch assays with monocultures of HaCaT, GM Fbs and coculture of these two cell types were performed. We detected that, CAP accelerated the migratory capability of HaCaT cells cocultured with fibroblasts. In fact, compared to HaCaT monoculture, a significant acceleration on cell migration was observed in coculture upon CAP treatment. NAC, a potent antioxidant could abrogate this CAP-stimulated cell migration in coculture, further pointing towards the importance of well-orchestrated reactive species in wound healing. To better understand this CAP-mediated effect on cell migration, we examined the signaling pathways involved in tissue homeostasis and regeneration. We checked the HIPPO signaling pathway and observed an upregulation of several signaling molecules at transcriptional level in GM Fbs upon CAP treatment.YAP is the central nuclear executer of HIPPO signaling pathway. YAP was upregulated in both HaCaT cells and GM Fbs. The major downstream effectors of the HIPPO signaling pathway (CTGF and Cyr61) were also upregulated in dermal fibroblasts at both transcriptional and protein level. However, administration of antioxidant NAC inhibited CAP-mediated wound healing and abrogated the gene expression of the HIPPO downstream effectors. These results confirm that the upregulation of YAP-CTGF-CYR61 axis is due to CAP-generated redox species. In HaCaT cells, both CTGF and Cyr61 was minimally transcribed. Even though CTGF was rarely detected in HaCaT cells on the protein level,Cyr61 remained undetected. This again shows the importance of the cross talk between fibroblasts and keratinocytes.The coculture with the inclusion of fibroblasts showed an accelerated migration rate, compared to HaCaT monoculture which specifies a cross talk between these two cell types. Thus, monoculture of HaCaT cells were incubated with CAP-treated and untreated fibroblast conditioned medium. Interestingly, we observed that HaCaT cells exhibited an improved cell migration rate when incubated with CAP-treated fibroblast-conditioned media compared to that observed after incubation with untreated media. Upon investigation, an induction of CTGF and Cyr61 secretion was observed upon CAP treatment in the fibroblast-conditioned media. Furthermore, exposure to recombinant CTGF and Cyr61 could also significantly improve HaCaT cell migration which confirms that CAP mediated accelerated cell migration is due to activation of YAP-CTGF-Cyr61 axis.In conclusion, this study revealed a completely new mechanical insight of CAP mediated wound healing. Along with several other ECM molecules, CAP activates a regenerative signaling pathway i.e., HIPPO signaling pathway in dermal fibroblasts at the onset of wound healing. Dermal fibroblasts drive a paracrine interaction by secreting CTGF and Cyr61 in close vicinity of wound, resulting in accelerated keratinocyte migration and wound healing in coculture." @default.
• W3135362102 created "2021-03-15" @default.
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• W3135362102 date "2021-01-19" @default.
• W3135362102 modified "2023-09-27" @default.
• W3135362102 title "The effect of Cold Atmospheric Plasma (CAP) on the molecular mechanism of wound healing" @default.
• W3135362102 hasPublicationYear "2021" @default.
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