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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
21/06/2010 |
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Data da última atualização: |
25/09/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CHAPAVAL, L.; MOON, D. H.; GOMES, J. E.; DUARTE, F. R.; TSAI, S. M. |
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Afiliação: |
LEA CHAPAVAL, CNPC; USP, Centro de Energia Nuclear na Agricultura; USP , ESALQ; USP, ESALQ; USP, ESALQ. |
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Título: |
Use of PCR to detect classical enterotoxins genes (ENT) and toxic isolated from crude milk and determination of toxin productivities of S. aureus isolates hartoring these genes. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Arquivos do Instituto Biológico, v. 73, n. 2, p. 165-169, abr./jun. 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: During a 2-year period (2003-2004), 132 strains of Staphylococcus aureus isolated from crude milk (without thermal treatment) collected in different places in Piracicaba, São Paulo State, Brazil, were investigated for the presence of genes for enterotoxins (ent) and toxic shock syndrome toxin-1 (tst). Polymerase-chain reaction (PCR) was performed by using 6 pairs of relevant oligonucleotide primers. Ninety isolates (68.18%) were positive for (47 strains) or 2 (43 strains) toxin genes. The combination of entA and tst showed the highest prevalence (33 strains).The good correlation between PCR results and toxin protein detection and identification by optimum-sensitivity-plate (OSP) test was observed when 44.45% of strains showed positive for toxin production. [Uso da reação da polimerase em cadeia (PCR) para detecção de genes de enterotoxina (ent) e genes da toxina da síndrome do choque tóxico (tst) em Staphylococcus aureus isolados do leite cru e determinação da produção de toxinas em isolados portado]. Resumo: Durante um período de 2 anos (2003-2004), 132 cepas de Staphylococcus aureus isoladas de leite cru foram coletadas de diferentes regiões de Piracicaba, no Estado de São Paulo. Foi investigada a presença dos genes de enterotoxinas (ent) e genes da Toxina-1 da Síndrome do Choque Tóxico (tst). A reação da polimerase em cadeia (PCR) foi executada usando 6 pares de oligonucleotídeos específicos para cada gene em questão. Noventa e quatro isolados (68,18%) se mostraram positivos para a presença de um (47 isolados) ou mais genes (43 isolados). A combinação da presença de entA e tst mostrou alta prevalência (33 isolados). Houve boa correlação entre a presença do gene e a produção/detecção da toxina, feita pelo teste da sensibilidade ótima em placas (OSP), que foi observada quando 44,44% dos isolados mostraramse positivos para a produção de toxina. MenosAbstract: During a 2-year period (2003-2004), 132 strains of Staphylococcus aureus isolated from crude milk (without thermal treatment) collected in different places in Piracicaba, São Paulo State, Brazil, were investigated for the presence of genes for enterotoxins (ent) and toxic shock syndrome toxin-1 (tst). Polymerase-chain reaction (PCR) was performed by using 6 pairs of relevant oligonucleotide primers. Ninety isolates (68.18%) were positive for (47 strains) or 2 (43 strains) toxin genes. The combination of entA and tst showed the highest prevalence (33 strains).The good correlation between PCR results and toxin protein detection and identification by optimum-sensitivity-plate (OSP) test was observed when 44.45% of strains showed positive for toxin production. [Uso da reação da polimerase em cadeia (PCR) para detecção de genes de enterotoxina (ent) e genes da toxina da síndrome do choque tóxico (tst) em Staphylococcus aureus isolados do leite cru e determinação da produção de toxinas em isolados portado]. Resumo: Durante um período de 2 anos (2003-2004), 132 cepas de Staphylococcus aureus isoladas de leite cru foram coletadas de diferentes regiões de Piracicaba, no Estado de São Paulo. Foi investigada a presença dos genes de enterotoxinas (ent) e genes da Toxina-1 da Síndrome do Choque Tóxico (tst). A reação da polimerase em cadeia (PCR) foi executada usando 6 pares de oligonucleotídeos específicos para cada gene em questão. Noventa e quatro isolados (68,18%) se mostra... Mostrar Tudo |
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Palavras-Chave: |
Enterotoxina; Leite cru. |
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Thesagro: |
Doença; Enterotoxemia; Staphylococcus aureus; Toxina. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/86393/1/API-Use-of-PCR-to-detect-classical.PDF
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Marc: |
LEADER 02705naa a2200241 a 4500
001 1855695
005 2019-09-25
008 2006 bl uuuu u00u1 u #d
100 1 $aCHAPAVAL, L.
245 $aUse of PCR to detect classical enterotoxins genes (ENT) and toxic isolated from crude milk and determination of toxin productivities of S. aureus isolates hartoring these genes.$h[electronic resource]
260 $c2006
520 $aAbstract: During a 2-year period (2003-2004), 132 strains of Staphylococcus aureus isolated from crude milk (without thermal treatment) collected in different places in Piracicaba, São Paulo State, Brazil, were investigated for the presence of genes for enterotoxins (ent) and toxic shock syndrome toxin-1 (tst). Polymerase-chain reaction (PCR) was performed by using 6 pairs of relevant oligonucleotide primers. Ninety isolates (68.18%) were positive for (47 strains) or 2 (43 strains) toxin genes. The combination of entA and tst showed the highest prevalence (33 strains).The good correlation between PCR results and toxin protein detection and identification by optimum-sensitivity-plate (OSP) test was observed when 44.45% of strains showed positive for toxin production. [Uso da reação da polimerase em cadeia (PCR) para detecção de genes de enterotoxina (ent) e genes da toxina da síndrome do choque tóxico (tst) em Staphylococcus aureus isolados do leite cru e determinação da produção de toxinas em isolados portado]. Resumo: Durante um período de 2 anos (2003-2004), 132 cepas de Staphylococcus aureus isoladas de leite cru foram coletadas de diferentes regiões de Piracicaba, no Estado de São Paulo. Foi investigada a presença dos genes de enterotoxinas (ent) e genes da Toxina-1 da Síndrome do Choque Tóxico (tst). A reação da polimerase em cadeia (PCR) foi executada usando 6 pares de oligonucleotídeos específicos para cada gene em questão. Noventa e quatro isolados (68,18%) se mostraram positivos para a presença de um (47 isolados) ou mais genes (43 isolados). A combinação da presença de entA e tst mostrou alta prevalência (33 isolados). Houve boa correlação entre a presença do gene e a produção/detecção da toxina, feita pelo teste da sensibilidade ótima em placas (OSP), que foi observada quando 44,44% dos isolados mostraramse positivos para a produção de toxina.
650 $aDoença
650 $aEnterotoxemia
650 $aStaphylococcus aureus
650 $aToxina
653 $aEnterotoxina
653 $aLeite cru
700 1 $aMOON, D. H.
700 1 $aGOMES, J. E.
700 1 $aDUARTE, F. R.
700 1 $aTSAI, S. M.
773 $tArquivos do Instituto Biológico$gv. 73, n. 2, p. 165-169, abr./jun. 2006.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
29/12/2020 |
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Data da última atualização: |
29/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SILVA, L. J. da; CREVELIN, E. J.; SOUZA, D. T.; LACERDA JÚNIOR, G. V.; OLIVEIRA, V. M.; RUIZ, A. L. T. G.; ROSA, L. H.; MORAES, L. A. B.; MELO, I. S. de. |
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Afiliação: |
LEONARDO JOSÉ SILVA, ESALQ-USP; EDUARDO JOSÉ CREVELIN, FFCLRP-USP; DANILO TOSTA SOUZA, FFCLRP-USP; GILENO VIEIRA LACERDA JÚNIOR; VALERIA MAIA DE OLIVEIRA, CPQBA-UNICAMP; ANA LUCIA TASCA GOIS RUIZ, FCF-UNICAMP; LUIZ HENRIQUE ROSA, UFMG; LUIZ ALBERTO BERALDO MORAES, FFCLRP-USP; ITAMAR SOARES DE MELO, CNPMA. |
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Título: |
Actinobacteria from Antarctica as a source for anticancer discovery. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Scientific Reports, v. 10, article 13870, 2020. |
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Páginas: |
p. 1-15. |
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ISSN: |
2045-2322 |
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DOI: |
https://doi.org/10.1038/s41598-020-69786-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Although many advances have been achieved to treat aggressive tumours, cancer remains a leading cause of death and a public health problem worldwide. Among the main approaches for the discovery of new bioactive agents, the prospect of microbial secondary metabolites represents an effective source for the development of drug leads. In this study, we investigated the actinobacterial diversity associated with an endemic Antarctic species, Deschampsia antarctica, by integrated culture-dependent and culture-independent methods and acknowledged this niche as a reservoir of bioactive strains for the production of antitumour compounds. The 16S rRNA-based analysis showed the predominance of the Actinomycetales order, a well-known group of bioactive metabolite producers belonging to the Actinobacteria phylum. Cultivation techniques were applied, and 72 psychrotolerant Actinobacteria strains belonging to the genera Actinoplanes, Arthrobacter, Kribbella, Mycobacterium, Nocardia, Pilimelia, Pseudarthrobacter, Rhodococcus, Streptacidiphilus, Streptomyces and Tsukamurella were identified. The secondary metabolites were screened, and 17 isolates were identified as promising antitumour compound producers. However, the bio-guided assay showed a pronounced antiproliferative activity for the crude extracts of Streptomyces sp. CMAA 1527 and Streptomyces sp. CMAA 1653. The TGI and LC50 values revealed the potential of these natural products to control the proliferation of breast (MCF-7), glioblastoma (U251), lung/non-small (NCI-H460) and kidney (786-0) human cancer cell lines. Cinerubin B and actinomycin V were the predominant compounds identified in Streptomyces sp. CMAA 1527 and Streptomyces sp. CMAA 1653, respectively. Our results suggest that the rhizosphere of D. antarctica represents a prominent reservoir of bioactive actinobacteria strains and reveals it as an important environment for potential antitumour agents. MenosAbstract: Although many advances have been achieved to treat aggressive tumours, cancer remains a leading cause of death and a public health problem worldwide. Among the main approaches for the discovery of new bioactive agents, the prospect of microbial secondary metabolites represents an effective source for the development of drug leads. In this study, we investigated the actinobacterial diversity associated with an endemic Antarctic species, Deschampsia antarctica, by integrated culture-dependent and culture-independent methods and acknowledged this niche as a reservoir of bioactive strains for the production of antitumour compounds. The 16S rRNA-based analysis showed the predominance of the Actinomycetales order, a well-known group of bioactive metabolite producers belonging to the Actinobacteria phylum. Cultivation techniques were applied, and 72 psychrotolerant Actinobacteria strains belonging to the genera Actinoplanes, Arthrobacter, Kribbella, Mycobacterium, Nocardia, Pilimelia, Pseudarthrobacter, Rhodococcus, Streptacidiphilus, Streptomyces and Tsukamurella were identified. The secondary metabolites were screened, and 17 isolates were identified as promising antitumour compound producers. However, the bio-guided assay showed a pronounced antiproliferative activity for the crude extracts of Streptomyces sp. CMAA 1527 and Streptomyces sp. CMAA 1653. The TGI and LC50 values revealed the potential of these natural products to control the proliferation of breast (MCF-7)... Mostrar Tudo |
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Palavras-Chave: |
Anticancer activity; Antitumoral activity. |
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Thesagro: |
Bactéria não Patogênica; Câncer. |
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Thesaurus NAL: |
Actinobacteria; Antarctica. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219757/1/Melo-Actinobacteria-Antarctica-2020.pdf
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Marc: |
LEADER 02877naa a2200325 a 4500
001 2128824
005 2020-12-29
008 2020 bl uuuu u00u1 u #d
022 $a2045-2322
024 7 $ahttps://doi.org/10.1038/s41598-020-69786-2$2DOI
100 1 $aSILVA, L. J. da
245 $aActinobacteria from Antarctica as a source for anticancer discovery.$h[electronic resource]
260 $c2020
300 $ap. 1-15.
520 $aAbstract: Although many advances have been achieved to treat aggressive tumours, cancer remains a leading cause of death and a public health problem worldwide. Among the main approaches for the discovery of new bioactive agents, the prospect of microbial secondary metabolites represents an effective source for the development of drug leads. In this study, we investigated the actinobacterial diversity associated with an endemic Antarctic species, Deschampsia antarctica, by integrated culture-dependent and culture-independent methods and acknowledged this niche as a reservoir of bioactive strains for the production of antitumour compounds. The 16S rRNA-based analysis showed the predominance of the Actinomycetales order, a well-known group of bioactive metabolite producers belonging to the Actinobacteria phylum. Cultivation techniques were applied, and 72 psychrotolerant Actinobacteria strains belonging to the genera Actinoplanes, Arthrobacter, Kribbella, Mycobacterium, Nocardia, Pilimelia, Pseudarthrobacter, Rhodococcus, Streptacidiphilus, Streptomyces and Tsukamurella were identified. The secondary metabolites were screened, and 17 isolates were identified as promising antitumour compound producers. However, the bio-guided assay showed a pronounced antiproliferative activity for the crude extracts of Streptomyces sp. CMAA 1527 and Streptomyces sp. CMAA 1653. The TGI and LC50 values revealed the potential of these natural products to control the proliferation of breast (MCF-7), glioblastoma (U251), lung/non-small (NCI-H460) and kidney (786-0) human cancer cell lines. Cinerubin B and actinomycin V were the predominant compounds identified in Streptomyces sp. CMAA 1527 and Streptomyces sp. CMAA 1653, respectively. Our results suggest that the rhizosphere of D. antarctica represents a prominent reservoir of bioactive actinobacteria strains and reveals it as an important environment for potential antitumour agents.
650 $aActinobacteria
650 $aAntarctica
650 $aBactéria não Patogênica
650 $aCâncer
653 $aAnticancer activity
653 $aAntitumoral activity
700 1 $aCREVELIN, E. J.
700 1 $aSOUZA, D. T.
700 1 $aLACERDA JÚNIOR, G. V.
700 1 $aOLIVEIRA, V. M.
700 1 $aRUIZ, A. L. T. G.
700 1 $aROSA, L. H.
700 1 $aMORAES, L. A. B.
700 1 $aMELO, I. S. de
773 $tScientific Reports$gv. 10, article 13870, 2020.
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Embrapa Meio Ambiente (CNPMA) |
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