The effect of platelet-rich plasma in inactive form on the burn zone of stasis in rats

The effect of Tarantula cubensis D6 on zone of stasis in a rat burn model

AIM

Burn injuries are one of the most devastating injuries. Saving the zone of stasis decreases burn size, morbidity, and mortality. Tarantula cubensis (TC) increases epithelization of wounds, and increases wound contraction. In this study, we investigated the effects of TC on the stasis zone.

MATERIALS AND METHODS

36 Wistar albino female rats were divided into 3 groups. Using brass comb burn model, at days 0 and 3, physiological serum solution in group 2, TC injection in group 3and no injection in group 1 was applied. Thermal and normal images were taken on day 10 and rats were sacrificed for histopathological examination.

RESULTS

We found a statistically significant difference between the 1st and 3rd group, 2nd and 3rd group regarding viable wound areas (p < 0.05), temperature difference (body-stasis zone) and mean body temperature (p < 0.05). We found no statistically significant difference between groups regarding neovascularization, inflammatory density, and vital cutaneous appendages. We found a statistically significant difference in epithelial layer thickness between the1st and 3rd groups, 2nd and 3rd groups(p < 0.05).

CONCLUSION

TC increases stasis zone viability macroscopically, increases epithelial layer thickness histopathologically, thus it promotes wound healing in burn wounds. This increase in stasis zone viability was also established with thermal imaging.

The effect of mesenchymal stem cell lyophilizate on the recovery of the zone of stasis following thermal burns

INTRODUCTION AND AIM

Mesenchymal Stem Cells (MSCs) are known to contribute to wound healing by increasing tissue regeneration. This study examined the effect of MSC-Lyophilizate (MSC-L) on the recovery of the zone of stasis in thermal burns.

METHODS

A comb was used to induce second-degree thermal burns (1 × 2 cm) on the dorsum of the rats. Within 30 min after the burn, MSC-L derived from the umbilical cord was administered to the experimental group and 1.5 ml of 0.9% isotonic sodium chloride to the sham group. The control group did not receive any intervention. Tissue samples were collected on postoperative day 7. Histopathological assessments were made using a microscope with digital camera attachment. SPSS for IBM 25 was used for data analysis.

RESULTS

Epithelial loss and subepidermal bullae were observed in the control and sham groups on day 7. In the experimental group, the MSC-L administration was found to increase epithelial tissue formation and neovascularization in the dermis. We found no significant pathological findings in the epidermis and dermis in the experimental group.

CONCLUSION

Administration of umbilical cord-derived MSC-L is of potential importance in wound healing. In our study, we observed that MSC-L that contained 1.5 million cells contributed significantly to the recovery of the stasis zone of burn.

The effects of epidermal growth factor on early burn-wound progression in rats

After burns, protecting tissues by medicines in the zone of stasis reduces the width and depth of injury. This study's goal was to reduce burned tissue damage in the zone of stasis using epidermal growth factor (EGF). Forty-eight Wistar rats were separated into three groups. In all groups, the burn procedure was applied following the comb burn model. In Group 1, no postburn treatment was administered. In Group 2, physiological saline solution (0.3 cc) was injected intradermally and in Group 3, EGF (0.3 cc) was injected intradermally into stasis zone tissues after the burn procedure. Surviving tissue rates were 24.0% in Group 1, 25.3% in Group 2, and 70.2% in Group 3. The average numbers of cells stained with Nrf2, HO-1, and the number of apoptotic cells were 230, 150, and 17.5 in Group 1, 230, 145, and 15.0 in Group 2, and 370, 230, and 0 in Group 3, respectively. Values in Group 3 were found to be statistically significantly different than those of Groups 1 and 2; there was no difference between Groups 1 and 2. This study shows that EGF protects zone of stasis tissue from burn damage.