Methylene blue reduces progression of burn and increases skin survival in an experimental rat model
| Autor: | Marina J. F. Rosique, Carolina Caliari Oliveira, Rodrigo G. Rosique, Jayme Adriano Farina, Paulo Roberto Barbosa Evora, Francesca M. Faria |
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| Rok vydání: | 2017 |
| Předmět: |
Male
medicine.medical_specialty Necrosis medicine.medical_treatment 030230 surgery Nitric Oxide Critical Care and Intensive Care Medicine Antioxidants Nitric oxide Andrology 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Malondialdehyde medicine Animals Rats Wistar Nitrite Saline Skin Wound Healing business.industry 030208 emergency & critical care medicine General Medicine Rats Staining Methylene Blue Disease Models Animal Oxidative Stress chemistry Anesthesia Disease Progression Emergency Medicine Surgery Histopathology medicine.symptom Burns business Injections Intraperitoneal Methylene blue |
| Zdroj: | Burns. 43:1702-1708 |
| ISSN: | 0305-4179 |
| Popis: | Following burn, increased nitric oxide (NO) combine with superoxide anion forming peroxynitrite. Methylene blue (MB) has NO blocking and antioxidant effects. Male Wistar rats (250g) were burned bilaterally in dorsum with a comb metal plate heated inside boiling water and applied during 30s, creating four rectangular 10×20mm full-thickness burned areas separated by three 5×20mm unburned interspaces (stasis zone). 30 rats were randomized into three groups (n=10): treated groups received one dose of intraperitoneal (IP) MB injections (2mg/kg), one or six hours after injury, and control group received saline. Seven days after injury, wounds were visually analyzed for interspaces necrosis; full-thickness sections were evaluated with Masson staining; tissue fragments were processed for nitrite/nitrate (NOx) and malondialdehyde (MDA) dosages. Photographic analysis: interspaces progression to necrosis were higher in control (64.8%) than in one (44.7%) and six (13.3%) hours MB groups (P=0.0060). Histopathology showed lower necrosis percentage in one (34.85%) and six (41.62%) hours MB groups than control (77.03%) (P=0.0034) and higher normal skin percentage in one (25.33%) and six (26.85%) hours MB groups than control (8.32%) (P=0.0037). Re-epithelialization skin areas were higher in both MB groups (39.94% for one and 31.89% for six hours) than control (14.63%) (P=0.0210). Interspace's NOx increased in both MB groups (P=0.0130) with no difference in burned areas. No MDA difference was observed. IP MB injection one or six hours after injury reduced necrosis progression in stasis area in the rat comb burn model suggesting an antioxidant effect reducing oxidative stress. |
| Databáze: | OpenAIRE |
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