Anti-inflammatory activity and acute toxicity studies of hydroalcoholic extract of Herissantia tiubae

ABSTRACT Hydroalcoholic extract of aerial parts of Herissantia tiubae (K. Schum.) Brizicky, Malvaceae, was evaluated in experimental models of inflammation and toxicity. For toxicity assays, male and female Swiss mice were orally treated with hydroalcoholic extract of H. tiubae (2000 mg/kg) and analyzed by consumption of water and food, body weight, mortality and rates of major organ weights, as well as biochemical and hematological indexes. For anti-inflammatory effect, phlogistic agents such as carrageenan or acetic acid were used to evaluate paw edema, cell migration and cytokine production. It was also investigated the hydroalcoholic extract of H. tiubae in RAW 264.7 macrophage lineage by nitric oxide and cytokine productions. Swiss mice treated with hydroalcoholic extract of H. tiubae showed low toxicity and (50 or 100 mg/kg) was able to reduce significantly (p < 0.01, p < 0.001) polymorphonuclear cell migration, TNF-α and IL-1β production in the carrageenan-induced peritonitis. However the hydroalcoholic extract of H. tiubae (50, 100 or 200 mg/kg) did not reduce carrageenan-induced paw edema. Additionally, hydroalcoholic extract of H. tiubae did not present cytotoxicity at concentrations of 6.25, 12.5, 25 or 50 µg/ml but induced significantly decrease of NO, TNF-α and IL-6 production in macrophage lineage. This study suggests that hydroalcoholic extract of H. tiubae has anti-inflammatory activity by inhibiting cell migration mainly by decreasing the inflammatory cytokine levels at the inflamed site independently of the anti-edematogenic effect.

Hemossiderose pulmonar idiopática: relato de caso / Idiopathic pulmonary hemosiderosis: case report

Objetivo: Alertar o pediatra sobre a possibilidade do diagnóstico de hemossiderose pulmonar idiopática na infância, nos casos de anemia associada à doença pulmonar crônica. Métodos: Este artigo descreve a hemossiderose pulmonar idiopática em criança de 6 anos de idade, documentada histopatologicamente e faz uma revisão sobre o tema. Resultados: Criança de 6 anos de idade com quadro prévio de anemia e doença pulmonar caracteerizada por chiado no peito, pneumonia de repetição diagnóstica, ocasião na qual apresentou súbita deterioração respiratória associada à hemoptise, quando foi submetida à biópsia pulmonar cuja análise histológica foi compatível com Hemossiderose Pulmonar. Iniciada corticoterapia com boa resposta inicial, porém houve novo surto de hemorragia pulmonar após dois meses e meio de terapia, desta vez fatal. Conclusões: A hemossiderose pulmonar idiopática deve ser lembrada como possibilidade diagnóstica em crianças com anemia equadro pulmonar crônico. Este caso ilustra bem essa possibilidade