Navegando por Autor "Oliveira, Leticia Castelo Branco Peroba"
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Artigo Antioxidant sulfated polysaccharide from edible red seaweed Gracilaria birdiae is an inhibitor of calcium oxalate crystal formation(MDPI, 2020-04-28) Oliveira, Leticia Castelo Branco Peroba; Queiroz, Moacir Fernandes; Fidelis, Gabriel Pereira; Melo, Karoline Rachel Teodosio; Câmara, Rafael Barros Gomes da; Alves, Monique Gabriela das Chagas Faustino; Costa, Leandro Silva; Teixeira, Dárlio Inácio Alves; Melo-Silveira, Raniere Fagundes; Rocha, Hugo Alexandre de OliveiraThe genus Gracilaria synthesizes sulfated polysaccharides (SPs). Many of these SPs, including those synthesized by the edible seaweed Gracilaria birdiae, have not yet been adequately investigated for their use as potential pharmaceutical compounds. Previous studies have demonstrated the immunomodulatory effects of sulfated galactans from G. birdiae. In this study, a galactan (GB) was extracted from G. birdiae and evaluated by cell proliferation and antioxidant tests. GB showed no radical hydroxyl (OH) and superoxide (O2−) scavenging ability. However, GB was able to donate electrons in two further different assays and presented iron- and copper-chelating activity. Urolithiasis affects approximately 10% of the world’s population and is strongly associated with calcium oxalate (CaOx) crystals. No efficient compound is currently available for the treatment of this disease. GB appeared to interact with and stabilize calcium oxalate dihydrate crystals, leading to the modification of their morphology, size, and surface charge. These crystals then acquired the same characteristics as those found in healthy individuals. In addition, GB showed no cytotoxic effect against human kidney cells (HEK-293). Taken together, our current findings highlight the potential application of GB as an antiurolithic agentTCC Indicadores bioquímicos em atletas de fisiculturismo: artigo de revisão(Universidade Federal do Rio Grande do Norte, 2016-12-05) Silva, Iago Levi Aguiar; Oliveira, Leticia Castelo Branco PerobaO fisiculturismo nasce com um propósito de retorno ao “ideal grego”, referenciando musculaturas desenvolvidas e saúde. Com o passar dos anos, fisiculturistas descobrem nos esteróides anabolizantes um meio de ficarem mais musculosos e com menor percentual de gordura. Entre os diversos efeitos colaterais trazidos pelo uso crônico dos esteróides, estão o aumento do LDL, diminuição do HDL e intolerância à glicose. Pode-se observar que o treinamento de força aumenta a tolerância à glicose e o treinamento aeróbico reduz o LDL e aumenta o HDL. Apesar das controvérsias encontradas, pressupõe-se que treinamentos de força e aeróbico podem gerar uma melhor qualidade de vida para fisiculturistas usuários de esteróides anabolizantes.