Introdução: A ausência de exercícios físicos gerada pela imobilização dos membros inferiores conduza mudanças na composição corporal que geralmente estão associadas com o desequilíbrio da taxametabólica que somados ao estado sedentário podem resultar em obesidade, diabetes mellitus edoenças cardiovasculares. Assim, a melhora do condicionamento físico pode contribuir para promoçãode saúde e qualidade de vida desses indivíduos. Como existe um número muito reduzido de pesquisasnesse sentido, nossa proposta foi investigar os efeitos de um programa de natação adaptada, emprotocolo intervalado, para pessoas com lesão medular, tendo como objetivo verificar a melhora do seucondicionamento físico e, conseqüentemente, de algumas variáveis bioquímicas importantes para asaúde. Metodologia: Participaram do estudo 17 indivíduos com lesão medular, sedentários, distribuí-dos em 2 grupos: 11 participantes do grupo treinamento (GT) e 6 do grupo controle (GC). No GT foiaplicado um protocolo de treinamento intervalado em natação, durante oito semanas consecutivas, 3vezes por semana. O protocolo empregou a braçada do nado peito, nos períodos de trabalho de intensidade moderada a intensa, e a braçada do nado costas, nos períodos de recuperação ativa. O GC nãoparticipou de nenhuma atividade física. Em ambos os grupos foi realizada a coleta de sangue para aanálise bioquímica, antes (avaliação) e após (reavaliação) o programa de natação. Resultados e Discussão: As concentrações de triglicerídeos, colesterol total e LDL-colesterol não apresentaram altera-ções significativas da avaliação para a reavaliação, em ambos os grupos. Entretanto no GT, na dosagem de HDL-colesterol foram observadas diferenças significativas (p=0,0110), evidenciando umamelhora na fase pós-treinamento, o que não ocorreu no GC. Com relação ao estado de condicionamento físico, os resultados revelaram uma diferença significativa em relação ao tempo e à distância percorrida na água quando comparados com a fase pré-treinamento (p<0,001), demonstrando uma grande melhora na capacidade de deslocamento com a braçada do nado peito e uma melhora significativa dafunção cardiorrespiratória. Conclusão: O programa de natação intervalado empregado, com intensidade de moderada à intensa, pode, mesmo em curto período de tempo, promover alterações positivasnos valores de HDL-colesterol dos indivíduos com lesão medular estudados, além de melhorar substancialmente seu condicionamento físico.
Background: Current therapies for acute leukemias (ALs) are associated with severe adverse reactions and high relapse rates, which makes the search for new antileukemic agents a necessity. Therefore, the aim of this study was to evaluate the effects of a new sulfonamide, S1, in AL cells K562 and Jurkat. Methods: The cytotoxic activity of S1 was assessed using MTT method. The involvement of apoptosis in the mechanism of cell death was assessed by flow cytometry and fluorescence microscopy. Results: Our results demonstrated that S1 induced morphological changes suggestive of apoptosis in both K562 and Jurkat cells. Additionally, S1 was not cytotoxic to normal erythrocytes and mononuclear cells and had a highly selective cytotoxicity for AL lineages. The mechanisms of cell death induced by S1 in K562 cells involves cell cycle arrest at G2/M phase and the activation of both extrinsic and intrinsic apoptosis, with an increased FasR and AIF expression and the loss of mitochondrial potential. As for Jurkat, we observed cell cycle blockade at G0/G1 phase, phosphatidylserine exposure and the involvement of intrinsic apoptosis only, with mitochondrial potential loss and a reduced expression of Survivin. Although sulfonamide S1 did not altered Bcl-2 and Bax expression in AL cell lines, it was able to activate caspase-3 in K562 cells. Conclusion: Our results suggest that sulfonamide S1 may be a promising candidate for the development of new drugs for the treatment of ALs
Abstract:Flavonoids are phenolic compounds with biological and pharmacological properties, such as antioxidant and antiviral effects. In the present work, we evaluated the effect of the flavonoids quercetin and rutin in human SD-MSCs (skin-derived-multipotent mesenchymal stromal cells). Cultured SD-MSCs were exposed to different concentrations of flavonoids (80 to 320 µM) for 2 days in vitro. Cell viability was assessed by MTT assay and cell proliferation by BrdU staining. Cell death was quantified by the analysis of picnotic nuclei. In this paper, we demonstrated for the first time that both quercetin and rutin affect the viability of SD-MSCs, although high concentrations of quercetin (320 µM) promoted increased values of picnoctic nuclei. Quercetin treatment increased cell proliferation and, in contrast, rutin in the same concentration decreased these values. Our results may aid the comprehension of flavonoids effect in SD-MSCs. However, a better understanding of the mechanisms involving flavonoids and SD-MSCs interactions are necessary.
Mammomonogamus laryngeus (sin.: Syngamus laryngeus) is a nematode which parasites the respiratory tract of some animals. It is occasionally seen in humans, who present symptoms similar to other diseases with respiratory manifestations, such as a chronic dry cough and chest pain, in addition to a “foreign body” sensation in the throat. It can be diagnosed through rhinolaryngoscopy or bronchoscopy examinations, but this often occurs only after spontaneous expectoration of the worms, a long period of symptomatology and the use of several types of medication. In this report, we describe a case of syngamosis in Florianópolis (Santa Catarina, Brazil). The patient consulted several health professionals during the course of the disease and was prescribed numerous drugs. Diagnosis was eventually reached after the spontaneous expectoration of a nematode couple.
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