Studies of Potency and Efficacy of an Optimized Artemisinin-Quinoline Hybrid against Multiple Stages of the Plasmodium Life Cycle

dc.creatorQuadros, Helenita C.
dc.creatorÇapcı, Aysun
dc.creatorHerrmann, Lars
dc.creatorD’Alessandro, Sarah
dc.creatorFontinha, Diana
dc.creatorAzevedo, Raquel
dc.creatorVillarreal, Wilmer
dc.creatorBasilico, Nicoletta
dc.creatorPrudêncio, Miguel
dc.creatorTsogoeva, Svetlana B.
dc.creatorMoreira, Diogo R. M.
dc.date2021-12-09T17:56:27Z
dc.date2021-12-09T17:56:27Z
dc.date2021
dc.date.accessioned2023-09-26T21:04:52Z
dc.date.available2023-09-26T21:04:52Z
dc.identifierQUADROS, Helenita C. et al. Studies of Potency and Efficacy of an Optimized Artemisinin-Quinoline Hybrid against Multiple Stages of the Plasmodium Life Cycle. Pharmaceuticals, 2021.
dc.identifier1424-8247
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/50256
dc.identifier10.3390/ph14111129
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8868827
dc.descriptionCAPES doctoral scholarship (Finance Code 001, Brazil). S.B.T. acknowledges the Deutsche Forschungsgemeinschaft (DFG) for funding (grant number TS87/17-1; TS87/23-1, Germany) and the Bavarian State Ministry for Science, Research and Art (Germany). D.R.M.M. acknowledges CNPq (grant No. 305732/2019-6, Brazil), FAPESB (grant number APP0088/2016, Brazil), and Fiocruz/Proep (grant number IGM-002-FIO-20-2-25, Brazil). M.P. was supported by grant PTDC-SAU-INF-29550-2017 (FCT, Portugal). S.D. and N.B. were supported by the by Fondazione Cariplo (grant number 2017-0846), the Ministero dell’Istruzione, dell’Università e della Ricerca (grant number PRIN 2015.4JRJPP_004), and the Ministero degli Affari Esteri e della Cooperazione Internazionale (Progetti di grande rilevanza, grant number 00949-2018). W.J.V.P. acknowledges FAPERGS (grant number ARD#21/2551-0000686-2).
dc.descriptionA recently developed artemisinin-quinoline hybrid, named 163A, has been shown to display potent activity against the asexual blood stage of Plasmodium, the malaria parasite. In this study, we determined its in vitro cytotoxicity to mammalian cells, its potency to suppress P. berghei hepatic infection and to decrease the viability of P. falciparum gametocytes, in addition to determining whether the drug exhibits efficacy of a P. berghei infection in mice. This hybrid compound has a low level of cytotoxicity to mammalian cells and, conversely, a high level of selectivity. It is potent in the prevention of hepatic stage development as well as in killing gametocytes, denoting a potential blockage of malaria transmission. The hybrid presents a potent inhibitory activity for beta-hematin crystal formation, in which subsequent assays revealed that its endoperoxide component undergoes bioactivation by reductive reaction with ferrous heme towards the formation of heme-drug adducts; in parallel, the 7-chloroquinoline component has binding affinity for ferric hemin. Both structural components of the hybrid co-operate to enhance the inhibition of betahematin, and this bitopic ligand property is essential for arresting the growth of asexual blood parasites. We demonstrated the in vivo efficacy of the hybrid as an erythrocytic schizonticide agent in comparison to a chloroquine/artemisinin combination therapy. Collectively, the findings suggest that the bitopic property of the hybrid is highly operative on heme detoxification suppression, and this provides compelling evidence for explaining the action of the hybrid on the asexual blood stage. For sporozoite and gametocyte stages, the hybrid conserves the potency typically observed for endoperoxide drugs, and this is possibly achieved due to the redox chemistry of endoperoxide components with ferrous heme.
dc.formatapplication/pdf
dc.languageeng
dc.publisherMDPI
dc.rightsopen access
dc.subjectMalária
dc.subjectPlasmodium
dc.subjectInfecções
dc.subjectEsporozoítos
dc.subjectHemina
dc.subjectCloroquina
dc.subjectMalaria
dc.subjectPlasmodium
dc.subjectHemozoin
dc.subjectHeterobivalent
dc.subjectArtemisinin
dc.subjectHybrids
dc.titleStudies of Potency and Efficacy of an Optimized Artemisinin-Quinoline Hybrid against Multiple Stages of the Plasmodium Life Cycle
dc.typeArticle


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