RESUMEN
This study evaluated the effects of topically applied hydrogels (HG) containing nanoencapsulated indol-3-carbinol (I3C) and its free form in a rat model of skin wounds. Formulations were topically applied twice a day for five days to the wounds. On days 1, 3, and 6, the wound area was measured to verify the % of regression. On the sixth day, the animals were euthanized for the analysis of the inflammatory and oxidative profile in wounds. The nanocapsules (NC) exhibited physicochemical characteristics compatible with this kind of suspension. After five hours of exposure to ultraviolet C, more than 78% of I3C content in the suspensions was still observed. The NC-I3C did not modify the physicochemical characteristics of HG when compared to the HG base. In the in vivo study, an increase in the size of the wound was observed on the 3rd experimental day, which was lower in the treated groups (mainly in HG-NC-I3C) compared to the control. On the 6th day, HG-I3C, HG-NC-B, and HG-NC-I3C showed lower regression of the wound compared to the control. Additionally, HG-NC-I3C exhibited an anti-inflammatory effect (as observed by decreased levels of interleukin-1B and myeloperoxidase), reduced oxidative damage (by decreased reactive species, lipid peroxidation, and protein carbonylation levels), and increased antioxidant defense (by improved catalase activity and vitamin C levels) compared to the control. The current study showed more satisfactory results in the HG-NC-I3C group than in the free form of I3C in decreasing acute inflammation and oxidative damage in wounds.
I3C nanocapsules exhibited characteristics compatible with this kind of suspension;On 3rd day, I3C nanocapsules prevented the increase of wound area;I3C nanocapsules decreased oxidative damage in wound tissue;Inflammatory proteins were decreased in I3C nanocapsules treated group.
Asunto(s)
Indoles , Inflamación , Nanocápsulas , Estrés Oxidativo , Piel , Cicatrización de Heridas , Animales , Indoles/farmacología , Ratas , Cicatrización de Heridas/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Inflamación/tratamiento farmacológico , Inflamación/metabolismo , Piel/efectos de los fármacos , Piel/patología , Piel/metabolismo , Nanocápsulas/química , Masculino , Ratas Wistar , Antioxidantes/farmacologíaRESUMEN
Stryphnodendron adstringens (barbatiman) is a tree found from Pará to Mato Grosso do Sul and Sao Paulo States (Brazil). The aim of this study was to determine the toxicity of the extracts of the broad beans of this species and to verify if they have some effect on the pregnancy of rats. The broad beans were collected in the region of Cuiabá (MT, Brazil) and separated in husks and seeds. The crude hydroalcoholic (2:1) extracts were prepared at room temperature and dried at a maximum of 55§C. Female virgin rats were mated and received the extracts (0.5 ml/100 g weight, 100 g/l) or water in the same proportion (control) by gavage from day 1 to day 7 of gestation. Laparatomies were made at day 7 to count the number of uterine implants and the rats were sacrificed on the 21st day of gestation. The seed extracts reduced the weight of the uterus and the number of live fetuses compared to the control group. The mean lethal dose (LD50subscribe) calculated for this extract was 4,992.8 mg/kg and the LD50(subscribe) of the extract of the husk was higher than 5,000 mg/kg. We may conclude that the extract of S. adstringens seeds impaired the gestation of rats, and its ingestion could be harmful to herbivorous animals