Veiga, Andreza do Socorro Silva daSilveira, Fernando TobiasSilva, Edilene Oliveira daDiniz Júnior, José Antônio PicançoAraújo, Sanderson CorrêaCampos, Marliane BatistaMarinho, Andrey Moacir do RosárioBrandão, Geraldo CélioVale, Valdicley VieiraPercário, SandroDolabela, Maria Fâni2022-11-042022-11-042022VEIGA, A. do S. S. da et al. Activity of alkaloids from Aspidosperma nitidum against Leishmania (Leishmania) amazonensis. Scientifc Reports, v. 12, 2022. Disponível em: <https://www.nature.com/articles/s41598-022-12396-x>. Acesso em: 11 out. 2022.2045-2322http://www.repositorio.ufop.br/jspui/handle/123456789/15738This study evaluated the morphological changes caused by fractions and subfractions, obtained from barks of Aspidosperna nitidum, against L. (L.) amazonensis promastigotes. The ethanolic extract (EE) obtained through the maceration of trunk barks was subjected to an acid–base partition, resulting the neutral (FN) and the alkaloid (FA) fractions, and fractionation under refux, yielded hexane (FrHEX), dichloromethane (FrDCL), ethyl acetate (FrACoET), and methanol (FrMEOH) fractions. The FA was fractionated and three subfractions (SF5-6, SF8, and SF9) were obtained and analyzed by HPLC–DAD and 1 H NMR. The antipromastigote activity of all samples was evaluated by MTT, after that, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for the active fractions were performed. Chromatographic analyzes suggest the presence of alkaloids in EE, FN, FA, and FrDCL. The fractionation of FA led to the isolation of the indole alkaloid dihydrocorynantheol (SF8 fractions). The SF5-6, dihydrocorynantheol and SF-9 samples were active against promastigotes, while FrDCL was moderately active. The SEM analysis revealed cell rounding and changes in the fagellum of the parasites. In the TEM analysis, the treated promastigotes showed changes in fagellar pocket and kinetoplast, and presence of lipid inclusions. These results suggest that alkaloids isolated from A. nitidum are promising as leishmanicidal.en-USabertoArtigo publicado em periodicoThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. Fonte: o PDF do artigo.https://doi.org/10.1038/s41598-022-12396-x