An Atmospheric Plasma Jet Induces Expression of Wound Healing Genes in Progressive Burn Wounds in a Comb Burn Rat Model: A Pilot Study

Pediatric Burn Treatment with Non-Thermal Atmospheric Plasma and Epifast®: Clinical Results

The effective treatment of severe burns in pediatric patients is essential for minimizing complications and promoting optimal recovery. This study investigates the use of non-thermal atmospheric pressure plasma (NTAPP) as an adjuvant therapy in combination with Epifast® for the experimental group, compared to standard care involving early excisions and Epifast® for the control group. A randomized controlled trial was conducted with 40 pediatric patients suffering from superficial partial-thickness and deep dermal burns. The experimental group that received NTAPP daily demonstrated a significant reduction in the need for skin grafts, requiring only 10% compared to 40% in the control group (p = 0.02). Although there were no statistically significant differences in the length of hospital stay, the experimental group showed a trend toward shorter stays (9.85 days vs. 11.65 days; p = 0.38) and lower analgesic consumption (13.01 doses vs. 21.15 doses; p = 0.09). Additionally, the infection rate in the NTAPP-treated group was significantly lower at 25%, compared to 37.95% in the control group (p < 0.05). These findings suggest that NTAPP enhances wound healing while reducing surgical morbidity and the risk of infections. In conclusion, this study highlights the transformative potential of NTAPP as an innovative strategy in pediatric burn management. It combines clinical efficacy with a less invasive approach, representing a significant advance in regenerative medicine and opening new avenues for research into advanced therapies.

A novel mouse model for studies of burn wound conversion using a top hat-shaped brass template

INTRODUCTION

The pathophysiology of burn wound conversion is not fully understood. Animal models are needed to elucidate the underlying mechanisms and develop treatments. Here, we established a new reproducible mouse model that simulates this process, thereby facilitating studies of burn wound conversion.

MATERIALS AND METHODS

After anesthesia and depilation, 75 mice were randomly assigned to 5-, 15-, and 25-s contact groups, and a top hat-shaped brass template was heated in boiling water and applied to the lateral abdomen. The wound area was calculated from photographs and the percentage of the surviving area was determined. Histological samples were collected 1-96 h after injury.

RESULTS

A 15-s contact time produced the desired 50 %-75 % interspace necrosis at 96 h after injury. The 5-s contact group had a mostly preserved interspace, while the 25-s contact group exhibited near-complete necrosis. Histologically, significant differences between the 5- and 15-s contact groups were seen in cutaneous appendage denaturation and panniculus carnosus denaturation early after injury.

CONCLUSION

Exposing mice to the heated template for 15 s provides a reproducible model for studying burn wound conversion mechanisms and treatments, facilitating further elucidation of burn pathophysiology and evaluation of therapies to prevent burn wound conversion.

Development of Nanomaterials-Based Agents for Selective Antibacterial Activity

Bacterial infections continue to threaten public health due to limitations in rapid and accurate diagnostic techniques. While broad-spectrum antibiotics offer empirical treatment, their overuse has fuelled the emergence of antimicrobial resistance (AMR) pathogens, posing a critical global public health challenge. In this critical scenario, nanomaterial-based antibacterial agents emerge as a promising solution to combat bacteria and inhibit their proliferation. However, selective elimination of pathogenic bacteria is paramount. This review highlights recent advancements in developing nanomaterials for selective antibacterial activity. We categorize these agents based on their mode of action, exploring how they selectively interact with bacteria and their potential antibacterial mechanisms. This review offers crucial insights for researchers exploring the potential of nanotechnology to address the growing threat of AMR.

Inhibition of CYP1A1 expression enhances diabetic wound healing by modulating inflammation and oxidative stress in a rat model

OBJECTIVE

Wound therapies utilizing gene delivery to the skin offer considerable promise owing to their localized treatment benefits and straightforward application. This study investigated the impact of skin electroporation of CYP1A1 shRNA lentiviral particles on diabetic wound healing in a streptozotocin (STZ)-induced rat model.

METHODS

Male Sprague Dawley (SD) rats were made diabetic by injecting STZ and subsequently creating foot skin wounds. The rats were randomly divided into four groups: normal, diabetic foot ulcers (DFU), DFU + control shRNA (electroporation of control shRNA lentiviral particles), and DFU + CYP1A1 shRNA (electroporation of CYP1A1 shRNA lentiviral particles). Wound healing progress was monitored at multiple time points (0, 1, 3, 5, 7, 10, 14 days). On day 14, wound tissue specimens were collected for histological examination. Wound samples collected at days 7 and 14 were used for gene expression analysis via qRT-PCR, assessment of CYP1A1 protein levels using western blotting, and evaluation of oxidative stress markers.

RESULTS

Treatment with CYP1A1 shRNA significantly enhanced diabetic wound healing rates compared to untreated controls over the observation period. Histological analysis revealed improved wound characteristics in the CYP1A1 shRNA-treated group, including enhanced epithelial regeneration, reduced inflammation, and increased collagen deposition, indicative of improved tissue repair. Furthermore, suppression of CYP1A1 corresponded with decreased expression levels of pro-inflammatory cytokines (interleukin-1β, tumor necrosis factor-α, and interleukin-6) and diminished oxidative stress markers (malondialdehyde, superoxide dismutase) within wound tissues.

CONCLUSION

Targeted suppression of CYP1A1 represents a promising therapeutic strategy to enhance diabetic wound healing by modulating inflammation and oxidative stress.

Antibacterial and deodorizing effects of cold atmospheric plasma-applied electronic deodorant

Axillary odor is a malodor produced by bacterial metabolism near the apocrine glands, which often causes discomfort in an individual's daily life and social interactions. A deodorant is a personal care product designed to alleviate or mask body odor. Currently, most deodorants contain antimicrobial chemicals and fragrances for odor management; however, direct application to the underarm skin can result in irritation or sensitivity. Therefore, there is a growing interest in technologies that enable disinfection and odor control without the antiperspirants or perfumes. The cold atmospheric plasma temporally generates reactive radicals that can eliminate bacteria and surrounding odors. In this study, cultured Staphylococcus hominis and Corynebacterium xerosis, the causative bacteria of axillary bromhidrosis, were killed after 90% plasma exposure for 3 min. Moreover, the electronic nose system indicated a significant reduction of approximately 51% in 3-hydroxy-3-methylhexanoic acid and approximately 34% in 3-methyl-3-sulfanylhexan-1-ol, the primary components of axillary odor, following a 5-min plasma exposure. These results support the dual function of our deodorant in eliminating bacteria and axillary odors without the chemical agents. Therefore, cold atmospheric plasma-applied deodorant devices have great potential for the treatment and management of axillary odors as a non-contact approach without chemical use in daily life.

Human Trial for the Effect of Plasma-Activated Water Spray on Vaginal Cleaning in Patients with Bacterial Vaginosis

Underwater plasma discharge temporally produces several reactive radicals and/or free chlorine molecules in water, which is responsible for antimicrobial activity. Hence, it can simply sanitize tap water without disinfectant treatment. Additionally, the spraying technique using cleaning water exploits deep application in the narrow and curved vaginal tract of patients. Herein, we attempted a clinical trial to evaluate the vaginal cleaning effect of spraying plasma-activated water (PAW) to patients with vaginitis (46 patients). The efficacy was compared with treatment with betadine antiseptics used to treat bacterial vaginosis (40 patients). To evaluate the cleaning effect, Gram staining of the vaginal secretions was conducted before and after spraying PAW or betadine treatment (BT). Consequently, PAW-sprayed (PAWS) patients (22.3%) showed a better vaginal cleaning effect against Gram-positive and -negative bacteria than BT patients (14.4%). Moreover, 18 patients in the BT group showed worsened vaginal contamination, whereas five patients in the PAWS group showed worsened vaginal contamination. Taken together, the noncontact method of spraying cleaning water to the vagina exhibited a reliable vaginal cleaning effect without further bacterial infection compared with BT. Therefore, we suggest a clinical application of the spraying method using PAW for vaginal cleaning to patients with vaginitis without disinfectants and antibiotics.