| Revista: | Acta cirurgica brasileira |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000286051 |
| ISSN: | 0102-8650 |
| Autores: | Castro e Silva-Junior, Orlando de1 Castro-e-Silva, Tiago2 Ramalho, Fernando Silva Ramalho, Leandra Naira Zambelli Zucoloto, Sergio Marcassa, Luis Gustavo Bagnato, Vanderlei Salvador |
| Instituciones: | 1Universidade de Sao Paulo, Faculdade de Medicina, Ribeirao Preto, Sao Paulo. Brasil 2Universidade de Sao Paulo, Instituto de Física, Sao Carlos, Sao Paulo. Brasil |
| Año: | 2002 |
| Volumen: | 17 |
| Paginación: | 92-95 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Recently, the LED (light emitting diode) developed by the Optics Group of IFSC-USP has been used instead of laser for the treatment of skin tumors by the PDT (Photodinamic Therapy) because of its low operational cost compared to the use of a laser. In this paper we investigate the effect of LED light on oxidative phosphorylation during liver regeneration after partial hepatectomy. Twenty-four male Wistar rats (250 g) were kept in identical housing units on a 12-hour light/12 hour dark cycle. The LED 10 group was exposed to LED at 638 nm (10 J/cm2 for 3 minutes). Seventy percent partial hepatectomy was performed in the LED 10 and HPC (Partial Hepatectomy-Control). A sham-operated group (C) was used for control. Twenty four hours after the procedure, LED 10, HPC and control animals were sacrificed. Samples of liver tissue were used for the mitochondrial respiration assay. Statistical comparisons of the groups were performed by analysis of variance (ANOVA), followed by the Bonferroni post-test. Probability values less than 0.05 were considered to be statistically significant. the phosphorylation index (FI) for the LED 10 group was higher than that for the HPC group and for the sham group (p<005). The FI for the HPC group was higher than that for the sham group (p<005). The values of the ADP:O ratio for the three groups, which did not differ significantly from one another (p > 0.05). In the present study we noted an effective interaction between LED light and hepatic mitochondria, with an increased phosphorylation rate for the latter |
| Disciplinas: | Medicina |
| Palabras clave: | Cirugía, Gastroenterología, Terapéutica y rehabilitación, Hígado, Mitocondria, Fosforilación, Hepatectomía parcial, Regeneración |
| Keyword: | Medicine, Gastroenterology, Surgery, Therapeutics and rehabilitation, Phosphorylation, Partial hepatectomy, Liver, Mitochondria, Regeneration |
| Texto completo: | Texto completo (Ver HTML) |
