ABSTRACT
UNLABELLED: Repeated blood transfusions in patients with sickle cell anemia (SCA) increases the risk of iron overload (IO), contributing to oxidative stress. MATERIALS & METHODS: Blood samples of 15 SCA patients without IO (group 1) and 15 SCA patients with IO (group 2) and 30 healthy individuals were collected to investigate oxidative stress. IO was categorized using repeated measures of serum ferritin. The biomarkers evaluated were plasmatic malondialdehyde (MDA), nitrite and erythrocyte catalase. RESULTS: MDA and nitrite were higher in group 2 than in group 1 and the healthy group (p < 0.001 for MDA and nitrite). Catalase presented lower in group 2 than group 1 and the healthy group (p < 0.001). We obtained a positive correlation between ferritin and MDA (r = 0.40; p < 0.02), and between ferritin and nitrite (r = 0359; p = 0.023). CONCLUSION: The results demonstrated that IO is an important risk factor for enhanced oxidative stress in SCA.
Subject(s)
Anemia, Sickle Cell/complications , Anemia, Sickle Cell/metabolism , Iron Overload/complications , Iron Overload/metabolism , Oxidative Stress , Adult , Anemia, Sickle Cell/blood , Anemia, Sickle Cell/therapy , Female , Ferritins/blood , Humans , Iron Overload/etiology , Male , Malondialdehyde/blood , Nitrites/blood , Transfusion ReactionABSTRACT
Objetivos: os efeitos da administração aguda oral do extrato aquoso do pó obtido do mesocarpo de Orbignya phalerata Mart foram investigados sobre parâmetros bioquímicos e hematológicos em camundongos Swiss machos. Métodos: os animais (n= 5-7/grupo) foram tratados por via oral com as doses de 1, 2 e 3 g/kg de peso corporal, observados durante 24 h e em seguida foi feita a coleta do sangue para avaliação dos parâmetros bioquímicos e hematológicos. Resultados: o tratamento com extrato aquoso do pó causou um pequeno número de mortes e baixa toxicidade nos animais. A administração do extrato aquoso do pó não alterou os parâmetros bioquímicos e hematológicos e o peso de órgãos. Para os parâmetros hematológicos, houve pequenas mudanças nas contagens de neutrófilos, linfócitos, eosinófilos e monócitos, mas estes não foram diferentes dos valores de referência. Conclusões: em conclusão, a administração aguda do extrato aquoso do pó não induziu nenhum efeito de risco na maioria dos parâmetros bioquímicos e hematológicos estudados em camundongos Swiss machos. No entanto, novos estudos com doses mais elevadas são necessários, para justificar ainda mais o uso seguro do mesocarpo do babaçu na alimentação humana.
Objetivos: los efectos de la administración oral aguda de polvo de extracto acuoso obtenido del mesocarpio de Orbignya phalerata Mart fueron investigados en los parámetros bioquímicos y hematológicos en ratones machos suizos. Métodos: los animales (n= 5-7/grupo) se trataron por vía oral con dosis de peso corporal 1, 2 y 3 g/kg, se observaron durante 24 h y luego se recogió sangre para la evaluación de los parámetros bioquímicos y hematología. Resultados: el tratamiento con polvo de extracto acuoso causó algunas muertes y baja toxicidad en animales. Su administración no alteró los parámetros bioquímicos y hematológicos ni el peso de los órganos. Para los parámetros hematológicos hubo pequeños cambios en el recuento de neutrófilos, linfocitos, eosinófilos y monocitos, pero estos no fueron diferentes de los valores de referencia. Conclusiones: la administración aguda de polvo de extracto acuoso no indujo ningún efecto de riesgo en la mayoría de los parámetros bioquímicos y hematológicos estudiados en ratones machos suizos. Sin embargo, los estudios con dosis mayores son necesarios para justificar aún más el uso seguro de mesocarpio de babasú en los alimentos.
Objectives: the effects of acute oral administration of aqueous extract powder obtained from the Orbignya phalerata Mart mesocarp were analyzed in terms of biochemical and hematological parameters in male Swiss mice. Methods: mice (n= 5-7/group) were orally treated with doses of 1, 2, and 3 g/kg body weight, they were observed for 24 h and then blood samples were collected for evaluation of biochemical and hematological parameters. Results: treatment with aqueous extract power caused the death of some animals and low toxicity. The administration did not alter either the biochemical and hematological parameters or the weight of organs. As to the hematological parameters, there were small changes in neutrophil, lymphocyte, eosinophil and monocyte counts, but these were not different from the reference values. Conclusions: the acute administration of aqueous extract powder did not induce any risky effect on most biochemical and hematological parameters studied in male Swiss mice. However, further studies with higher doses are needed to further support the safe use of babassu mesocarp in food.
ABSTRACT
The antioxidant and antinociceptive activities of Citrus limon essential oil (EO) were assessed in mice or in vitro tests. EO possesses a strong antioxidant potential according to the scavenging assays. Moreover, it presented scavenger activity against all in vitro tests. Orally, EO (50, 100, and 150 mg/kg) significantly reduced the number of writhes, and, at highest doses, it reduced the number of paw licks. Whereas naloxone antagonized the antinociceptive action of EO (highest doses), this suggested, at least, the participation of the opioid system. Further studies currently in progress will enable us to understand the action mechanisms of EO.
