Os medicamentos provenientes de plantas estão presentes há milhares de anos na população. Muitas pessoas fazem uso destes produtos na forma de comprimidos, cápsulas, xaropes ou ainda utilizando a planta seca, inteira ou fracionada principalmente na forma de chás. A espécie Byrsonima crassifolia tem um grande potencial de ação terapêutico e está amplamente distribuída na Amazônia Brasileira, América Central e Caribe, sendo conhecida popularmente no Brasil com o nome de muricizeiro. Diversos registros na literatura abordam suas propriedades farmacêuticas, seja para o tratamento do controle da diabetes, depressão e de quadros inflamatórios. Por observar esta vasta quantidade de usos na literatura e, diante da necessidade de um cuidado maior na utilização de medicamentos provenientes de plantas em virtude de agentes tóxicos, foi realizado um estudo de revisão de literatura sobre as propriedades farmacêuticas e o potencial citotóxico de B. crassifolia. Palavras-chave: Byrsonima crassifolia. Muricizeiro. Propriedades farmacêuticas. Potencial citotóxico.
Background: Brazil has a high prevalence of infections caused by different arboviruses. The standard method used for diagnosis is an Enzyme-linked immunosorbent assay for IgM capture (MAC-ELISA). This study aimed to optimize and evaluate a one-step reverse transcriptionpolymerase chain reaction to detect acute infections caused by dengue, zika, chikungunya, and mayaro virus in clinical samples. Methods: We evaluated 620 sera samples collected from March 2016 to March 2018 and provided by the Central Health Laboratory of Maranhão (LACEN-MA). Total RNA was isolated from clinical specimens and used as the template for one-step RT-PCR assays with specific-primers designed for this study. Results: Of the 620 sera evaluated, 386 (62.2%) were positive, among them 330 (85.5%) amplified a specific fragment for chikungunya, 55 (14.2%) showed a fragment compatible with dengue serotype 4, and 1 (0.3%) exhibited profile for mayaro virus. Conclusions: The results obtained here were more sensitive than IgM-ELISA because the viral RNA was detected in serum samples from patients, not only from 1 to 6 days but also from 7 to 10 days after the beginning of clinical signs (convalescent period). Besides, the mayaro virus was detected in one serum sample that was IgM-ELISA negative for dengue, zika, and chikungunya.
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