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Screening the mutagenic activities of coomonly used antiparasite drugs by the Simultest, a simplified Salmonella/microsome plate incorporation assay

Rastreamento de atividade mutagênica de drogas anti-parasitárias de uso comum pelo Simultest, uma versão simplificada do teste Salmonella/fração microssomal

Abstracts

The mutagenic activities of 16 anti-parasite drugs were screened by the Simultest in both qualitative (spot test) and quantitative (plate incorporation) assays with a Salmonella typhimurium pool composed by the indicator strains TA97, TA 98, TA100 and TA102. Four anti Chagas' disease drugs (nifurtimox, benznidazole, CL 64,855, and MK 436) and two anti-amebae drugs (metronidazole and tinidazole) gave positive results in qualitative tests and incorporation of rat liver microsomes did not alter the results. Comparative dose response curves of the mutagenic activities of CL 64,855, metronidazole and benznidazole obtained by the simultest and by individual Salmonella indicator strains demonstrated that both approachs have similar sensitivities. The results corroborate the validity of the Simultest, as a simplified, fast and economic version of the Ames test in preliminary screening of potential mutagenic drugs.

Simultest; Anti-parasite drugs; Ames test


As atividades mutagênicas de 16 drogas com ação anti-parasitária foram avaliadas pelo Simultest em ensaios qualitativos (spot testes) e quantitativos (incorporação em placa) com uma mistura das linhagens indicadoras de Salmonella typhimurium TA97, TA98, TA100 e TA102. Quatro drogas anti-doença de Chagas (nifurtimox, benzonidazol, CL 64,855 e MK 436) e duas drogas anti-amebiase (metronidazol e tinidazol) deram resultados positivos em testes qualitativos e a incorporação de fração microssomal de fígado de rato não alterou os resultados. Curvas comparadas de efeito da dose da atividade mutagênica do metronidazol, benzonidazol e CL 64,855 detectadas pelo Simultest e linhagens indicadoras individuais demonstraram que as duas abordagens possuem sensibilidades semelhantes. Os resultados corroboram a validade do Simultest como uma versão simplificada, rápida e econômica do teste de Ames no rastreamento preliminar de drogas potencialmente mutagênicas.


ORIGINAL ARTICLES

Screening the mutagenic activities of coomonly used antiparasite drugs by the Simultest, a simplified Salmonella/microsome plate incorporation assay

Rastreamento de atividade mutagênica de drogas anti-parasitárias de uso comum pelo Simultest, uma versão simplificada do teste Salmonella/fração microssomal

Maria Eliane B. MeloI; Luís Carlos S. FerreiraII,III

ICentro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz. Recife, Pernambuco, Brazil

IIDepartamento de Biofísica e Radiobiologia and Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco. Recife, Pernambuco, Brazil

IIIPresent address: Instituto de Biofísica Carlos Chagas Filho. Universidade Federal do Rio de Janeiro — CCS. Cidade Universitária, Ilha do Fundão. 21949 Rio de Janeiro. RJ, Brazil

All correspondence should be sent to All correspondence should be sent to: Luís Carlos S. Ferreira

SUMMARY

The mutagenic activities of 16 anti-parasite drugs were screened by the Simultest in both qualitative (spot test) and quantitative (plate incorporation) assays with a Salmonella typhimurium pool composed by the indicator strains TA97, TA 98, TA100 and TA102. Four anti Chagas' disease drugs (nifurtimox, benznidazole, CL 64,855, and MK 436) and two anti-amebae drugs (metronidazole and tinidazole) gave positive results in qualitative tests and incorporation of rat liver microsomes did not alter the results. Comparative dose response curves of the mutagenic activities of CL 64,855, metronidazole and benznidazole obtained by the simultest and by individual Salmonella indicator strains demonstrated that both approachs have similar sensitivities. The results corroborate the validity of the Simultest, as a simplified, fast and economic version of the Ames test in preliminary screening of potential mutagenic drugs.

Key words: Simultest; Anti-parasite drugs; Ames test.

RESUMO

As atividades mutagênicas de 16 drogas com ação anti-parasitária foram avaliadas pelo Simultest em ensaios qualitativos (spot testes) e quantitativos (incorporação em placa) com uma mistura das linhagens indicadoras de Salmonella typhimurium TA97, TA98, TA100 e TA102. Quatro drogas anti-doença de Chagas (nifurtimox, benzonidazol, CL 64,855 e MK 436) e duas drogas anti-amebiase (metronidazol e tinidazol) deram resultados positivos em testes qualitativos e a incorporação de fração microssomal de fígado de rato não alterou os resultados. Curvas comparadas de efeito da dose da atividade mutagênica do metronidazol, benzonidazol e CL 64,855 detectadas pelo Simultest e linhagens indicadoras individuais demonstraram que as duas abordagens possuem sensibilidades semelhantes. Os resultados corroboram a validade do Simultest como uma versão simplificada, rápida e econômica do teste de Ames no rastreamento preliminar de drogas potencialmente mutagênicas.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

ACKNOWLEDGMENTS

We acknowledge the excelent technical assistence of Mr. S. H. Almeida and Dr. Ames and Dr. Rosenkranz for the bacterial indicator strains.

Recebido para publicação em 23/10/1989

Research supported by the Japanese International Cooperation Agency, FINEP and CNPq.

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  • All correspondence should be sent to:

    Luís Carlos S. Ferreira
  • Publication Dates

    • Publication in this collection
      12 Sept 2006
    • Date of issue
      Aug 1990

    History

    • Received
      23 Oct 1989
    Instituto de Medicina Tropical de São Paulo Av. Dr. Enéas de Carvalho Aguiar, 470, 05403-000 - São Paulo - SP - Brazil, Tel. +55 11 3061-7005 - São Paulo - SP - Brazil
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