Estudo pré-clínico detoxicidade do extrato acetato de etila do fruto de dillenia indica padronizado em ácido betulínico e administrado topicamente em camundongos

• Autor(a) principal: Fernandes, Flávia de Souza
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/15174
• topic: Dillenia indica; Toxicidade; Segurança

The literature contains several efficacy studies of extracts from Dillenia indica Linn. (Dilleniaceae). However there are few studies of toxicity. Objective: To evaluate in pre-clinical phase the systemic toxicity of the ethyl acetate extract of the fruit of D. indica standardized in betulinic acid and administered topically in mice. Methods: First, mice were divided into: a test-group treated with extract (150 mg/mL), positive control treated with clobetasol (0,5 mg/mL) and a negative one treated with excipient daily for 10 days (N=20, male and female 1:1). The evaluations were related to mortality, aggressiveness, piloerection, diarrhea, convulsions, abdominal contortions, food and water consumption, body and organs-weight, hematological and biochemical parameters. The open field and the grip force tests were performed. With another set of mice, another groups were formed, just like before but including a naïve group treated with excipient, being the positive control treated with metoxypsoralen 1% (single doses). Half hour later, mice were exposed to ultraviolet radiation in minimal dose of erythema, being the photosensitizing effect judged 24 h later. Results: No mortality, aggressiveness, piloerection, diarrhea, convulsions and meuromotor alterations were observed. The average body weight gain was 1.2 ± 0.3 g, liver weight was 1.5 ± 0.1 g, heart (0.14 ± 0.01 g), spleen (0.07 ± 0.01 g), kidneys (0.53 ± 0.05 g). Average of water consumption (223.2 ± 40.3 mL) and food (241.9 ± 27.2 g). The average glycemia was 52.8 ± 5.0 mg/dL, cholesterolemia (91.2 ± 6.9 mg/dL), triglyceridemia (46.6 ± 4.0 mg/dL), serum urea levels (52.8 ± 4.9 mg/dL) and the activity of aspartate and alanine aminotransferase were 27.1 ± 3.8 and 30.7 ± 8.4 U, respectively. The extract induced photosensitivity close to that induced by methoxypsoralen. Conclusion: Treatment with extract did not cause mortality or other adverse effects. On the other hand, the data indicated a photosensitizer potential for the extract.