Effect of cold plasma on periodontal wound healing-an in vitro study

OBJECTIVES

Cold atmospheric plasma (CAP), a room temperate ionized gas, seems to be a possible way to enhance tissue recovery. An in vitro study was conducted to investigate the influence of medical CAP on the regenerative capacity of human periodontal ligament (PDL) cells.

MATERIAL AND METHODS

Human PDL cells were subjected to CAP at various intensities, distances, and durations. The effects of CAP on a number of specific markers were studied at transcriptional level using real-time PCR. Additionally, an in vitro wound healing assay was applied to PDL cell monolayers either in the presence or absence of CAP by using JuLI™ Br Live Cell Analyzer and software. Finally, cell viability of CAP-treated cells was analyzed by an XTT assay.

RESULTS

CAP treatment enhanced significantly the expression of the cytokines tumor necrosis factor (TNF)α, cyclooxygenase (COX)2, interleukin (IL)-1β, IL-6, IL-8, collagen (COL)1α, and matrix metalloproteinase (MMP)1, as well as the proliferation markers Ki67 and proliferating cell nuclear antigen (PCNA), but downregulated apoptotic markers Apaf1 and p53. Additionally, the in vitro wound healing rate was significantly enhanced after CAP application. Moreover, CAP treatment resulted in a significantly increased cell viability in the XTT assay.

CONCLUSION

This in vitro study shows that CAP has regulatable effects on markers of periodontal wound healing thereby underlining the potential use of CAP as a benefit treatment strategy.

CLINICAL RELEVANCE

Our study demonstrates the application of CAP in the treatment of oral pathologies suggesting a promising future treatment approach.

Regenerative potential of human adipose-derived stromal cells of various origins

In regenerative concepts, the potential of adult stem cells holds great promise concerning an individualized therapeutic approach. These cells provide renewable progenitor cells to replace aged tissue, and play a significant role in tissue repair and regeneration. In this investigation, the characteristics of different types of adipose tissue are analysed systematically with special attention to their proliferation and differentiation potential concerning the angiogenic and osteogenic lineage. Tissue samples from subcutaneous, visceral, and omental fat were processed according to standard procedures. The cells were characterized and cultivated under suitable conditions for osteogenic and angiogenic cell culture. The development of the different cell cultures as well as their differentiation were analysed morphologically and immunohistochemically from cell passages P1 to P12. Harvesting and isolation of multipotent cells from all three tissue types could be performed reproducibly. The cultivation of these cells under osteogenic conditions led to a morphological and immunohistochemical differentiation; mineralization could be detected. The most stable results were observed for the cells of subcutaneous origin. An osteogenic differentiation from adipose-derived cells from all analysed fatty tissues can be achieved easily and reproducibly. In therapeutic concepts including angiogenic regeneration, adipose-derived cells from subcutaneous tissue provide the optimal cellular base.

[Psychosomatic rehabilitation]

In rehabilitation medicine a multi-axial descriptive and theoretical model must be applied to do justice to the manifold aspects. In particular for psychosomatic medicine, but to the same extent also for disciplines concerned with the individual organs, it will necessary to pay attention to the social-interactional as well as to the development psychology aspects of these diseases and to their anatomic pathology and physiological pathology developments. The tasks and aims of psychosomatic rehabilitation medicine are described: diagnostics, details of hospitalisation and psychotherapy are described. To enhance the therapeutic value of the psychosomatic hospital somatotherapy and psychotherapy are co-ordinated for the patient's benefit. The special importance of psychosomatic rehabilitation for prevention is pointed out. A new, comprehensive re-orientation is aimed at to help patients to lead a generally healthier and more effective life.