Autor(es): Ramallo,Bianca Trovello ; Lourenço,Elizete ; Cruz,Renata Harumi ; Almeida,Jacqueline Camargo ; Taha,Murched Omar ; Silva,Priscilla Yuri Okochi Alves ; Oliveira-Júnior,Itamar Souza
Data: 2013
Origem: Oasisbr
Assunto(s): Burns; Aging; Lung Injury; Cytokines; Pentoxifylline; Rats
PURPOSE: To investigate the protective effects of pentoxifylline against lung injury observed after dorsal scald in aged animals. METHODS: Adult (eight months old) and aged (20 months old) rats were subjected to thermal injury or sham procedure. The six hours post-trauma animals received pentoxifylline and after 24 hours were euthanatized and lung tissue samples collectedted. The bronchoalveolar lavage fluid was evaluated for total protein content and tumor necrosis factor-alpha cytokine. Malondialdehyde and myeloperoxidase activety in the lung homogenate were measured and a histological lung examination was undertaken. RESULTS: Burn injury induced oxidative stress in lung homogenate was higher in elderly-burned rats compared to adult-burned rats (p<0.001). Total protein and cytokine in bronchoalveolar lavage increased in the elderly-burned group when compared to the adult-burned group (p<0.001). All parameters decreased in bolth groups treated with pentoxifylline (p<0.05). CONCLUSIONS: The injury was augmented in elderly rats when compared to adult rats. Damage was reduced with the use of pentoxifylline, however further studies are needed to evaluate the dose-response of the drug.
