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Caixeta SC, Magalhães LG, de Melo NI, Wakabayashi KAL, Aguiar GDP, Aguiar DDP, Mantovani ALL, Alves JM, Oliveira PF, Tavares DC, Groppo M, Rodrigues V, Cunha WR, Veneziani RCS, da Silva Filho AA, Crotti AEM. Chemical composition and in vitro schistosomicidal activity of the essential oil of Plectranthus neochilus grown in Southeast Brazil. Chem Biodivers 2012; 8:2149-57. [PMID: 22083928 DOI: 10.1002/cbdv.201100167] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The chemical composition and the in vitro schistosomicidal effects of the essential oil of Plectranthus neochilus (PN-EO) grown in Southeast Brazil was studied. β-Caryophyllene (1; 28.23%), α-thujene (2; 12.22%), α-pinene (3; 12.63%), β-pinene (4; 6.19%), germacrene D (5; 5.36%), and caryophyllene oxide (6; 5.37%) were the major essential oil constituents. This chemical composition differed from that previously reported for specimens harvested in Africa. Concerning the in vitro schistosomicidal activity against adult Schistosoma mansoni worms, PN-EO was considered to be active, but less effective than the positive control praziquantel (PZQ) in terms of separation of coupled pairs, mortality, decrease in the motor activity, and tegumental alterations. However, PN-EO caused an interesting dose-dependent reduction in the number and the percentage of developed S. mansoni eggs. These results suggest that PN-EO might be very promising for the development of new schistosomicidal agents.
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Affiliation(s)
- Soraya C Caixeta
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, Franca, SP, Brazil
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de Melo NI, Magalhaes LG, de Carvalho CE, Wakabayashi KAL, de P. Aguiar G, Ramos RC, Mantovani ALL, Turatti ICC, Rodrigues V, Groppo M, Cunha WR, Veneziani RCS, Crotti AEM. Schistosomicidal activity of the essential oil of Ageratum conyzoides L. (Asteraceae) against adult Schistosoma mansoni worms. Molecules 2011; 16:762-73. [PMID: 21245809 PMCID: PMC6259589 DOI: 10.3390/molecules16010762] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/11/2011] [Accepted: 01/17/2011] [Indexed: 12/02/2022] Open
Abstract
The in vitro schistosomicidal effects of the essential oil of Ageratum conyzoides L. (Ac-EO) against adult worms of Schistosoma mansoni is reported in this paper. Concerning this activity, Ac-EO was considered to be active, but less effective than the positive control (praziquantel, PZQ) in terms of separation of coupled pairs, mortality, decrease in motor activity, and tegumental alterations. However, Ac-EO caused an interesting dose-dependent reduction in the number of eggs of S. mansoni. Precocene I (74.30%) and (E)-caryophyllene (14.23%) were identified as the two major constituents of Ac-EO. These compounds were tested individually and were found to be much less effective than Ac-EO and PZQ. A mixture of the two major compounds in a ratio similar to that found in the Ac-EO was also less effective than Ac-EO, thus revealing that there are no synergistic effects between these components. These results suggest that the essential oil of A. conyzoides is very promising for the development of new schistosomicidal agents.
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Affiliation(s)
- Nathalya I. de Melo
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Lizandra G. Magalhaes
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Carlos E. de Carvalho
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Kamila A. L. Wakabayashi
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Gabriela de P. Aguiar
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Rafael C. Ramos
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Andre L. L. Mantovani
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Izabel C. C. Turatti
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, CEP 14040-903 Ribeirão Preto, SP, Brazil; E-Mail: (I.C.C.T.)
| | - Vanderlei Rodrigues
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, CEP 14049-900 Ribeirão Preto, SP, Brazil; E-mail: (V.R.)
| | - Milton Groppo
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, CEP 14040-901 Ribeirão Preto, SP, Brazil; E-mail: (M.G.)
| | - Wilson R. Cunha
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Rodrigo C. S. Veneziani
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
| | - Antônio E. M. Crotti
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, CEP 14404-600, Franca, SP, Brazil; E-Mails: (N.I.M.); (L.G.M.); (C.E.C.); (K.A.L.W); (G.P.A); (R.C.R.); (A.L.L.M.); (W.R.C.); (R.C.S.V.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-16-3711-8871; Fax: +55-16-3711-8871
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