ABSTRACT
The aim of this study was to investigate the effect of bark extract Bathysa cuspidata (BCE) in the reconstitution of hepatic parenchyma and stroma after dysfunction induced by the CCl4. Liver lesions were induced by intraperitoneal administration of CCl4 (1 mL/kg) every 48 h for 12 days. The animals were treated with B. cuspidata extract (BCE) administered by gavage for another 12 days. Forty-nine rats were randomized into seven treatment groups with seven animals receiving CCl4, BCE (200, or 400 mg/kg) and the vehicle DMSO alone, or in different combinations. The extract alone showed no evidence of hepatic toxicity. In general, rats acutely exposed to CCl4 without the treatment with BCE presented high ALT and AST serum levels and high tissue content of lipid hydroperoxides, malondialdehyde, and lipid droplets. BCE administration, especially at 400 mg/kg attenuated significantly all these parameters. Furthermore, the antioxidant activities of the enzymes superoxide dismutase and catalase were significantly increased in the groups receiving this extract. These results showed that the extract of B. cuspidata stem bark stimulated the antioxidant defense system and reduced the morphological and functional liver damage in Wistar rats previously exposed to CCl4.
ABSTRACT
O presente estudo avaliou os efeitos do laser arseneto de gálio-alumínio (GaAsAl), do laser arseneto de gálio (GaAs) e pomada cicatrizante DersaniÒ sobre leucócitos sanguíneos após realização de feridas cutâneas em ratos Wistar. Os parâmetros analisados foram os valores hematológicos dos animais. Foram utilizados 30 ratos Wistar, adultos jovens, machos, provenientes da Universidade Federal de Viçosa. Cinco feridas de 12 mm foram feitas na região dorsal do ratos. Os animais foram separados em 5 grupos, com 6 animais cada. Grupo 1: animais tratados com o laser GaAs (4J/cm2), grupo 2: laser GaAsAl (30J/cm2), grupo 3: laser GaAsAl (60J/cm2), grupo 4: foi usada pomada DersaniÒ grupo 5: solução salina (controle). As aplicações foram feitas diariamente durante 20 dias. Foi coletado sangue no primeiro e último dia do experimento e foi armazenado com anticoagulante. A contagem global de leucócitos foi feita utilizando câmera de Neubauer. A contagem diferencial foi feita através de esfregaço após coloração com Giemsa. A contagem global de leucócitos nos diferentes tratamentos não apresentou diferença significativa, exceto nos animais tratados com DersaniÒ em que houve aumento significativo no número de monócitos. Os tratamentos com salina e Laser GaAsAl 30J/cm2 também apresentaram aumento no número de neutrófilos.
This study evaluated the effect of the gallium aluminum arsenide laser (GaAsAl), gallium arsenide laser (GaAs) and healing ointment Dersani® on blood leukocytes after performing cutaneous incision in Wistar rats. The analyzed parameters were the hematological values of the animals. 30 Wistar rats, young, adults, males, from Federal University of Viçosa, MG were used. Five incisions (12 mm long) were made in the dorsal region of the rats. The animals were divided into five groups, with six animals each. Group 1: animals treated with the GaAs laser (4J/cm2); Group 2: GaAsAl laser (30 J/cm2); Group 3: GaAsAl laser (60 J/cm2); Group 4: the DersaniÒ ointment was used; Group 5: saline solution (control). Therapy was applied daily for a period of 20 days. Blood samplings were carried out on the first and last day of the experiment and stored with anticoagulant. Total leukocytes count was performed using a Neubauer camera. Differential counts of Giemsa-stained smears were made. Total leukocytes count did not show significant difference in any treatment, except in the animals treated with Dersani® that a significant increase in monocytes number was found. The treatment with saline and the GaAsAl (30 J/cm2) laser showed also an increase in the number of neutrophils.