Tendon repair by plasma jet treatment

Low Temperature Plasma Jet Treatment Promotes Skin Wound Healing by Enhancing Cell Proliferation via the PI3K-AKT and AMPK Pathways

Low temperature plasma jet (LTPJ) treatment can promote skin wound healing, but the underlying molecular mechanisms remain poorly understood. In the present study, we verified the effect of LTPJ in accelerating wound healing and investigated its underlying mechanism. With mouse model, two full-thickness dermal wounds were created in each mouse (n = 8). One wound underwent LTPJ treatment for 10 min, while the other wound without LTPJ treatment served as a control. The percentage of wound closure and collagen content in epidermis increased significantly, which indicated that LTPJ treatment significantly enhanced wound healing through contraction. RNA-seq analysis was conducted to understand the underlying mechanisms. A total of 77 differentially expressed genes (DGEs) were identified. GO and KEGG pathway enrichment analyses revealed that the DGEs were mainly related to the collagen-containing extracellular matrix, cell cycle, PI3K-AKT signalling pathway and AMPK signalling pathway, which are known to be related to wound healing. HaCaT keratinocytes were used to study LTPJ effects on cell proliferation in vitro. In agreement with the in vivo results, the in vitro datas also demonstrated that LTPJ treatment affected the activity of the PI3K-AKT and AMPK pathways. Our findings suggest that LTPJ treatment promotes skin wound healing by inducing genes associated with wound healing, promoting PI3K-AKT signalling, and suppressing the AMPK signalling pathway.

Corona discharge plasma stimulated production of atropine in callus of Datura inoxia by DNA hypomethylation and gene regulation: a novel technology for plant cell and tissue culture

Few investigations have tested the practical use of cold plasma as a novel technology to meet the requirements in the plant cell and tissue culture field. To fill the knowledge gap, we intend to respond to the question of whether plasma priming influenced DNA ultrastructure and the production of atropine (a tropane alkaloid) in Datura inoxia. Calluses were treated with the corona discharge plasma at time durations ranging from 0 to 300 s. Significant increases (about 60%) in biomass were observed in the plasma-primed calluses. The plasma priming of calluses enhanced the accumulation of atropine about 2-fold. The plasma treatments increased proline concentrations and soluble phenols. The drastic increases in the activity of the phenylalanine ammonia-lyase (PAL) enzyme resulted from the applied treatments. Likewise, the plasma treatment of 180 s upregulated the expression of the PAL gene by 8-fold. Also, the expression of the ornithine decarboxylase (ODC) and tropinone reductase I (TR I) genes were stimulated by 4.3-fold and 3.2-fold, respectively, in response to the plasma treatment. The putrescine N-methyltransferase gene displayed a similar trend to that of TR I and ODC genes following the plasma priming. Methylation sensitive amplification polymorphism method was employed to explore the plasma-associated epigenetic changes in DNA ultrastructure. The molecular assessment referred to DNA hypomethylation, validating an epigenetic response. This biological assessment study validates the hypothesis that plasma priming of callus is an efficient, cost-effective, and eco-friendly tool to enhance callogenesis efficiency, elicit metabolism, affect gene regulation, and modify chromatin ultrastructure in D. inoxia.

Non-Invasive Physical Plasma Treatment after Tooth Extraction in a Patient on Antiresorptive Medication Promotes Tissue Regeneration

Postoperative tissue regeneration can be negatively affected by bisphosphonate administration, especially in patients with oncologic diseases. A serious complication of bisphosphonate therapy is the medication-related osteonecrosis of the jaw (MRONJ), which can be observed mainly after dental surgery. MRONJ is a progressive destruction of the bone that requires patients to stay in hospital for extended periods of time. For this reason, primary wound closure is particularly important in surgical procedures. In the case of wound dehiscence, there is a very high risk for MRONJ. In recent years, non-invasive physical plasma (NIPP) has become known for improving wound healing on the one hand, but also for its promising efficacy in cancer therapy on the other hand. We report on a 63-year-old patient with a history of multiple myeloma and receiving zoledronate, who developed wound dehiscence after tooth extraction. NIPP treatment resulted in complete epithelialization of the entire wound dehiscence. In conclusion, the use of NIPP in patients receiving antiresorptive drugs seems to support tissue regeneration and thus could be an important tool for the prevention of MRONJ.

Gas Plasma-Augmented Wound Healing in Animal Models and Veterinary Medicine

The loss of skin integrity is inevitable in life. Wound healing is a necessary sequence of events to reconstitute the body’s integrity against potentially harmful environmental agents and restore homeostasis. Attempts to improve cutaneous wound healing are therefore as old as humanity itself. Furthermore, nowadays, targeting defective wound healing is of utmost importance in an aging society with underlying diseases such as diabetes and vascular insufficiencies being on the rise. Because chronic wounds’ etiology and specific traits differ, there is widespread polypragmasia in targeting non-healing conditions. Reactive oxygen and nitrogen species (ROS/RNS) are an overarching theme accompanying wound healing and its biological stages. ROS are signaling agents generated by phagocytes to inactivate pathogens. Although ROS/RNS’s central role in the biology of wound healing has long been appreciated, it was only until the recent decade that these agents were explicitly used to target defective wound healing using gas plasma technology. Gas plasma is a physical state of matter and is a partially ionized gas operated at body temperature which generates a plethora of ROS/RNS simultaneously in a spatiotemporally controlled manner. Animal models of wound healing have been vital in driving the development of these wound healing-promoting technologies, and this review summarizes the current knowledge and identifies open ends derived from in vivo wound models under gas plasma therapy. While gas plasma-assisted wound healing in humans has become well established in Europe, veterinary medicine is an emerging field with great potential to improve the lives of suffering animals.

Evaluating the effect of cold plasma on the healing of gingival wound

BACKGROUND

This is the first study that conducted to the effect of cold plasma on the healing of gingival wound in diabetic rabbits.

MATERIAL AND METHOD

Eighteen healthy rabbits is purched from pastor institute. The aloxan was injected to the rabbits. After induction of anesthesia the gum tissue is removed. The rabbits were treated by the plasma jet for 3, 5 and 10 days each day 30 s and they were considered histological.

RESULTS AND DISCUSSION

After 3 days the plasma jet treatment, the production of collagen and fibroblast and migration of epithelial cells is observed. As can be seen from the results after 5 days the cold plasma treatment the increase of neovascularation, collagen and inflammatory infiltration is seen in gum tissue. Formation of granulation tissue is seen after 10 days the plasma jet treatment.

CONCLUSION

The cold plasma treatment is an effective way for gingival wound treatment. Cold plasma treatment resulted in reduction of inflammatory phase and accelerates the recovery phase by increase neovascularation and collagen production.