Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 21
Filtrar
Mais filtros











Intervalo de ano de publicação
1.
Braz J Biol ; 83: e275603, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37729317

RESUMO

Foodborne diseases are common illnesses caused by the consumption of food contaminated with microorganisms, such as viruses, fungi, bacteria, and protozoa. Every year, 600 million people become ill and 420,000 people die as a result of consuming contaminated food. Therefore, food safety is an important issue. In this study, samples of homemade spiced mayonnaise and self-serve acai sold in the city of Araguaína, Tocantins, Brazil were analyzed for microbiological contaminants. Acai was collected from 10 stores, one sample from each store, and tested for mold, yeast, and coliforms, as well as coliform identification and total and thermotolerant coliform counts. Mayonnaise was collected from 20 snack bars, one sample from each. These samples were inoculated on MacConkey and Salmonella Shigella agar plates, and the plates were analyzed for growth. Salmonella spp. were detected in some Mayonnaise samples, and coliforms were detected in all acai samples; 60% of samples had thermotolerant coliforms, and only 40% were within the limits established by ANVISA. The collected samples of mayonnaise and acai were contaminated with molds and yeasts above the established limit of 103 CFU/g. Thus, the analyzed mayonnaise and acai samples were contaminated and unfit for consumption, demonstrating the importance of hygienic-sanitary measures in food handling.


Assuntos
Alimentos , Humanos , Brasil , Ágar
2.
Arq. bras. med. vet. zootec. (Online) ; 75(1): 153-159, 2023. tab
Artigo em Inglês | VETINDEX | ID: biblio-1416628

RESUMO

A tripanossomíase bovina é causada pelo protozoário Trypanosoma vivax. A transmissão biológica ocorre apenas no continente africano pela mosca Tsé-tsé, de forma mecânica por dípteros hematófagos em todos os continentes, ou pelo compartilhamento de agulhas e por práticas associadas. O estudo teve como objetivo relatar o primeiro diagnóstico parasitológico, sorológico e molecular de T. vivax em bovinos leiteiros provenientes de cinco propriedades do município de Unai, Minas Gerais, Brasil. Cento e quinze animais selecionados por conveniência apresentavam sinais clínicos ou pertenciam a lotes de animais suspeitos. Foram detectados positivos pelos testes parasitológico (técnica de Woo), sorológico (ELISA) e molecular (LAMP). A maior prevalência global para T. vivax foi de 11,11% na propriedade A. O único sinal clínico dos animais positivos estudados foi baixa taxa de concepção. O primeiro diagnóstico de tripanossomíase no noroeste mineiro é extremamente importante, haja vista o tamanho do rebanho leiteiro da região e as possíveis perdas econômicas provocadas pela enfermidade. Ademais, faz-se necessário maior controle sanitário na região, uma vez que a transmissão no Brasil é intimamente ligada às práticas de compartilhamento de agulhas no manejo dos animais e ao parasitismo de moscas hematófagas.


Assuntos
Animais , Bovinos , Tripanossomíase Bovina/diagnóstico , Trypanosoma vivax/isolamento & purificação , Brasil , Ensaio de Imunoadsorção Enzimática/veterinária , Transcrição Reversa
3.
Braz. j. biol ; 83: e275603, 2023. tab, graf
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1513856

RESUMO

Abstract Foodborne diseases are common illnesses caused by the consumption of food contaminated with microorganisms, such as viruses, fungi, bacteria, and protozoa. Every year, 600 million people become ill and 420,000 people die as a result of consuming contaminated food. Therefore, food safety is an important issue. In this study, samples of homemade spiced mayonnaise and self-serve acai sold in the city of Araguaína, Tocantins, Brazil were analyzed for microbiological contaminants. Acai was collected from 10 stores, one sample from each store, and tested for mold, yeast, and coliforms, as well as coliform identification and total and thermotolerant coliform counts. Mayonnaise was collected from 20 snack bars, one sample from each. These samples were inoculated on MacConkey and Salmonella Shigella agar plates, and the plates were analyzed for growth. Salmonella spp. were detected in some Mayonnaise samples, and coliforms were detected in all acai samples; 60% of samples had thermotolerant coliforms, and only 40% were within the limits established by ANVISA. The collected samples of mayonnaise and acai were contaminated with molds and yeasts above the established limit of 103 CFU/g. Thus, the analyzed mayonnaise and acai samples were contaminated and unfit for consumption, demonstrating the importance of hygienic-sanitary measures in food handling.


Resumo As doenças transmitidas por alimentos são doenças comuns causadas pelo consumo de alimentos contaminados com microrganismos, como vírus, fungos, bactérias e protozoários. Todos os anos, 600 milhões de pessoas ficam doentes e 420.000 pessoas morrem como resultado do consumo de alimentos contaminados. Portanto, a segurança alimentar é uma questão importante. Neste estudo, amostras de maionese temperada caseira e açaí self-service vendidas na cidade de Araguaína, Tocantins, Brasil foram analisadas quanto a contaminantes microbiológicos. O açaí foi coletado em 10 lojas, uma amostra de cada loja, e testado para mofo, levedura e coliformes, bem como identificação de coliformes e contagem de coliformes totais e termotolerantes. A maionese foi coletada de 20 lanchonetes, sendo uma amostra de cada. Essas amostras foram inoculadas em placas de ágar MacConkey e Salmonella Shigella, e as placas foram analisadas quanto ao crescimento. Salmonela spp. foram detectados em algumas amostras de maionese e coliformes foram detectados em todas as amostras de açaí; 60% das amostras apresentaram coliformes termotolerantes, e apenas 40% estavam dentro dos limites estabelecidos pela ANVISA. As amostras coletadas de maionese e açaí estavam contaminadas com bolores e leveduras acima do limite estabelecido de 103 UFC/g. Assim, as amostras de maionese e açaí analisadas estavam contaminadas e impróprias para o consumo, demonstrando a importância das medidas higiênico-sanitárias na manipulação de alimentos.

4.
Braz J Med Biol Res ; 54(12): e11499, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34878062

RESUMO

Bone loss is a potential adverse consequence of rapid and sustained weight loss after bariatric surgery. The aim of the present study was to evaluate the bone mass, body fat distribution, and metabolic parameters in women submitted to Roux-en-Y gastric bypass (RYGB). The study included the following three groups: one group of lean women (control [C] group) and two groups of obese women, one evaluated one year (B1) and the other five years (B5) after RYGB. Dual-energy X-ray absorptiometry and magnetic resonance imaging were used to determine bone mineral density (BMD; lumbar spine, total hip, and femoral neck) and abdominal fat content (subcutaneous [SAT] and visceral [VAT] adipose tissues, and intrahepatic lipids [IHL]). The BMD/body mass index ratio was lower in the B5 compared with the C group at all sites. Serum C-terminal telopeptide of type I collagen (CTX) levels were higher in the B1 and B5 groups compared with the C group. Individuals submitted to RYGB showed greater SAT but similar VAT and IHL values compared with those in the C group. However, the B5 group had higher mean parathyroid hormone levels compared with the other two groups. Individuals submitted to RYGB presented increased levels of CTX and low BMD for body weight than those in the C group, suggesting that bone catabolism is a persistent alteration associated with RYGB. In conclusion, the long-lasting metabolic benefits obtained with RYGB in obesity are counterbalanced by a persistent catabolic effect of the procedure on bone and mineral metabolism.


Assuntos
Doenças Ósseas Metabólicas , Derivação Gástrica , Obesidade Mórbida , Absorciometria de Fóton , Densidade Óssea , Osso e Ossos , Feminino , Derivação Gástrica/efeitos adversos , Humanos , Obesidade Mórbida/cirurgia
5.
Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;54(12): e11499, 2021. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1350326

RESUMO

Bone loss is a potential adverse consequence of rapid and sustained weight loss after bariatric surgery. The aim of the present study was to evaluate the bone mass, body fat distribution, and metabolic parameters in women submitted to Roux-en-Y gastric bypass (RYGB). The study included the following three groups: one group of lean women (control [C] group) and two groups of obese women, one evaluated one year (B1) and the other five years (B5) after RYGB. Dual-energy X-ray absorptiometry and magnetic resonance imaging were used to determine bone mineral density (BMD; lumbar spine, total hip, and femoral neck) and abdominal fat content (subcutaneous [SAT] and visceral [VAT] adipose tissues, and intrahepatic lipids [IHL]). The BMD/body mass index ratio was lower in the B5 compared with the C group at all sites. Serum C-terminal telopeptide of type I collagen (CTX) levels were higher in the B1 and B5 groups compared with the C group. Individuals submitted to RYGB showed greater SAT but similar VAT and IHL values compared with those in the C group. However, the B5 group had higher mean parathyroid hormone levels compared with the other two groups. Individuals submitted to RYGB presented increased levels of CTX and low BMD for body weight than those in the C group, suggesting that bone catabolism is a persistent alteration associated with RYGB. In conclusion, the long-lasting metabolic benefits obtained with RYGB in obesity are counterbalanced by a persistent catabolic effect of the procedure on bone and mineral metabolism.

6.
Osteoporos Int ; 31(6): 1125-1133, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32108240

RESUMO

The present study suggests that insulin resistance has no association with bone quantity, but quality. INTRODUCTION: The literature has contradictory results concerning the influence of insulin resistance on bone. The present study sought to evaluate the association of insulin resistance and adipose tissue with either bone mineral density or the trabecular bone score. METHODS: The study included 56 individuals (36 women and 20 men): age = 46.6 ± 14.2 years, weight = 67.8 ± 10.9 kg, height = 1.65 ± 0.10 m and BMI = 24.8 ± 3.9 kg/m2. The investigational protocol included biochemical determinations and bone assessment by dual X-ray absorptiometry for evaluation of bone mineral density and trabecular bone score. Magnetic resonance was employed to estimate visceral, subcutaneous and bone marrow adipose tissues, as well as intrahepatic lipids. RESULTS: The bone mineral density of the lumbar spine, femoral neck and total hip were not associated with insulin resistance-related parameters [visceral adipose tissue, intrahepatic lipids and homeostatic model assessment of insulin resistance (HOMA-IR)]. In contrast, there was a negative relationship between the trabecular bone score and all these components. The association between the trabecular bone score and HOMA-IR was reinforced after adjustment for age and BMI. Marrow adipose tissue was negatively associated with both bone mineral density and trabecular bone score. CONCLUSIONS: The present study shows that the trabecular bone score is negatively associated with marrow adipose tissue, insulin resistance, visceral adipose tissue and intrahepatic lipid measurements. Additionally, there was a negative relationship between saturated lipids in marrow adipose tissue and the trabecular bone score. These results encourage further studies to investigate the role of the trabecular bone score exam in the clinical evaluation of osteoporosis in conditions of insulin resistance.


Assuntos
Tecido Adiposo/diagnóstico por imagem , Densidade Óssea , Osso Esponjoso/diagnóstico por imagem , Resistência à Insulina , Absorciometria de Fóton , Adulto , Medula Óssea , Feminino , Humanos , Gordura Intra-Abdominal , Lipídeos/análise , Fígado/química , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade
7.
Arq. bras. med. vet. zootec. (Online) ; 70(1): 321-326, Jan.-Feb. 2018. graf, ilus
Artigo em Português | LILACS, VETINDEX | ID: biblio-1038584

RESUMO

The objective of this study was to describe lesions in four birds, victims of collisions with aircraft, coming from the International Airport of Recife/Guararapes Gilberto Freyre, Pernambuco, Brazil. Contused wounds were predominant in birds in this study, characterized by the presence of fractures, bruises and hematomas and justified by the blunt action promoted by the type of vulnerant agent involved (aircraft). The analysis under medico-legal veterinary aspect of lesions in bird strike is essential, because in addition to the attempt to establish a standard for differentiating the aircraft lesions, it can guide the bird strike hazard management programs at airports, since the necropsy allows the identification of the species involved or at least facilitates the obtaining biological material for identification.(AU)


Assuntos
Animais , Choque Traumático/veterinária , Ferimentos e Lesões/veterinária , Aves , Animais Selvagens , Médicos Veterinários , Médicos Legistas , Aeroportos
8.
Arq. bras. med. vet. zootec. (Online) ; 70(2): 505-510, mar.-abr. 2018. ilus
Artigo em Português | LILACS, VETINDEX | ID: biblio-910590

RESUMO

Objetivou-se com este estudo pesquisar a ocorrência de anticorpos anti-Toxoplasma gondii em carcarás (Caracara plancus) capturados no Aeroporto Internacional do Recife/Guararapes Gilberto Freyre, Pernambuco, Brasil. Foram analisadas 115 amostras de soros sanguíneos pelo teste de aglutinação modificada (IgG, MAT≥25) utilizando taquizoítos inativados em formalina. Do total de amostras analisadas, 5,21% (6/115) foram positivas para presença de anticorpos anti-T. gondii, 16,67% com título 1:25 (1/06) e 83,33% (5/06) com título 1:50. A ocorrência de anticorpos em carcarás procedentes de região aeroportuária fomenta a preocupação em relação a aspectos ainda pouco elucidados, relacionados principalmente à inserção de aves silvestres na cadeia epidemiológica da toxoplasmose conectada à ação antrópica, tornando próxima a interação entre animais silvestres, domésticos e o homem. Dessa forma, é notória a necessidade de estudos relacionados à dinâmica de transmissão entre os diferentes genótipos existentes nessa tríade e sua relação com o meio ambiente, a fim de determinar a influência dessa espécie animal na cadeia epidemiológica da toxoplasmose.(AU)


The objective of this study was to investigate the occurrence of antibodies against Toxoplasma gondii in carcarás (Caracara plancus) captured in the Recife/Guararapes Gilberto Freyre International Airport, in the State of Pernambuco, Brazil. 115 samples of blood sera were tested by the Modified Agglutination Test technique (IgG, MAT > 25) using tachyzoites inactivated in formalin. Of the total of the analyzed samples, 5,21% (6/115) were positive for the presence of antibodies against T. gondii, 16,67% with a titer of 1:25 (1/06) and 83,33% (5/06) with a titration of 1:50. The occurrence of antibodies in caracaras coming from airport region generate concern about aspects still poorly understood, mainly related to the inclusion of wild birds in the epidemiological chain of toxoplasmosis connected to human action, making close interaction between wild animals, domestic and man. Thus, the need for studies related to the dynamics of transmission between the different existing genotypes in this triad is evident as is its relationship with the environment to determine the influence of this animal species in the epidemiological chain of toxoplasmosis.(AU)


Assuntos
Animais , Falconiformes/imunologia , Aves Predatórias/imunologia , Toxoplasma/imunologia , Toxoplasmose Animal
9.
Artigo em Português | VETINDEX | ID: vti-734527

RESUMO

ABSTRACT The objective of this study was to describe lesions in four birds, victims of collisions with aircraft, coming from the International Airport of Recife/Guararapes Gilberto Freyre, Pernambuco, Brazil. Contused wounds were predominant in birds in this study, characterized by the presence of fractures, bruises and hematomas and justified by the blunt action promoted by the type of vulnerant agent involved (aircraft). The analysis under medico-legal veterinary aspect of lesions in bird strike is essential, because in addition to the attempt to establish a standard for differentiating the aircraft lesions, it can guide the bird strike hazard management programs at airports, since the necropsy allows the identification of the species involved or at least facilitates the obtaining biological material for identification.

10.
Arq. bras. med. vet. zootec. (Online) ; 70(2): 505-510, mar.-abr. 2018. ilus
Artigo em Português | VETINDEX | ID: vti-19140

RESUMO

Objetivou-se com este estudo pesquisar a ocorrência de anticorpos anti-Toxoplasma gondii em carcarás (Caracara plancus) capturados no Aeroporto Internacional do Recife/Guararapes Gilberto Freyre, Pernambuco, Brasil. Foram analisadas 115 amostras de soros sanguíneos pelo teste de aglutinação modificada (IgG, MAT≥25) utilizando taquizoítos inativados em formalina. Do total de amostras analisadas, 5,21% (6/115) foram positivas para presença de anticorpos anti-T. gondii, 16,67% com título 1:25 (1/06) e 83,33% (5/06) com título 1:50. A ocorrência de anticorpos em carcarás procedentes de região aeroportuária fomenta a preocupação em relação a aspectos ainda pouco elucidados, relacionados principalmente à inserção de aves silvestres na cadeia epidemiológica da toxoplasmose conectada à ação antrópica, tornando próxima a interação entre animais silvestres, domésticos e o homem. Dessa forma, é notória a necessidade de estudos relacionados à dinâmica de transmissão entre os diferentes genótipos existentes nessa tríade e sua relação com o meio ambiente, a fim de determinar a influência dessa espécie animal na cadeia epidemiológica da toxoplasmose.(AU)


The objective of this study was to investigate the occurrence of antibodies against Toxoplasma gondii in carcarás (Caracara plancus) captured in the Recife/Guararapes Gilberto Freyre International Airport, in the State of Pernambuco, Brazil. 115 samples of blood sera were tested by the Modified Agglutination Test technique (IgG, MAT > 25) using tachyzoites inactivated in formalin. Of the total of the analyzed samples, 5,21% (6/115) were positive for the presence of antibodies against T. gondii, 16,67% with a titer of 1:25 (1/06) and 83,33% (5/06) with a titration of 1:50. The occurrence of antibodies in caracaras coming from airport region generate concern about aspects still poorly understood, mainly related to the inclusion of wild birds in the epidemiological chain of toxoplasmosis connected to human action, making close interaction between wild animals, domestic and man. Thus, the need for studies related to the dynamics of transmission between the different existing genotypes in this triad is evident as is its relationship with the environment to determine the influence of this animal species in the epidemiological chain of toxoplasmosis.(AU)


Assuntos
Animais , Toxoplasma/imunologia , Falconiformes/imunologia , Aves Predatórias/imunologia , Toxoplasmose Animal
11.
Arq. bras. med. vet. zootec ; Arq. bras. med. vet. zootec. (Online);68(1): 113-118, jan.-fev. 2016. tab, graf
Artigo em Português | LILACS | ID: lil-771875

RESUMO

Objetivou-se com este estudo investigar a ocorrência de Mycoplasma spp., Mycoplasma galissepticum (MG) e Mycoplasma synoviae (MS) em psitacídeos de cativeiro localizado no estado de Pernambuco, Brasil. Foram estudadas 85 aves provenientes do Parque Estadual Dois Irmãos, localizado no estado do Pernambuco, Brasil. De cada psitacídeo analisado foram obtidas três amostras por meio de swabs da cloaca, palato e conjuntiva totalizando 255 amostras. As amostras coletadas foram submetidas à extração de DNA e à reação em cadeia da polimerase (PCR), sendo as positivas submetidas ao isolamento em ágar Frey. O DNA de Mycoplasma spp. foi detectado em 16,47% (14/85) dos psitacídeos estudados. Das 255 amostras analisadas, 6,66% (17/255) foram positivas para a presença de Mycoplasma spp., sendo 41,18% (7/17) provenientes da conjuntiva, 35,29% (6/17) do palato e 23,53% (4/17) da cloaca. Nenhuma amostra foi positiva para MG ou MS na PCR. Os resultados obtidos permitem confirmar a presença do DNA de Mycoplasma spp. em conjuntiva, palato e cloaca nas aves estudadas. Foram detectadas colônias semelhantes a membros da classe Mollicutes em 17,64% das amostras (3/17). Esse é o primeiro relato da presença de Mycoplasma spp. em psitacídeos de cativeiro no Nordeste do Brasil.


The aim of this study was to investigate the occurrence of Mycoplasma spp., Mycoplasma galissepticum (MG) and Mycoplasma synoviae (MS) in captive psittacines. Eighty-five wild birds from Parque Estadual Dois Irmãos, Pernambuco state, northeastern Brazil, were used. From each psittacid analyzed three samples were obtained through cloaca, palate and conjunctiva swabs, totaling 255 samples. Samples collected were submitted to DNA extraction and Polimerase Chain Reaction (PCR). Mycoplasma spp. DNA was detected in 16.47% (14/85) of psittacines studied. From 255 samples, 6.66% (17/255) were positive for Mycoplasma spp.: 41.18% (7/17) of positivity in conjunctiva, 35.29% (6/17) in palate and 23.53% (4/17) in cloaca. There was no positive sample for MG or MS in PCR. Similar colonies were found for members of the Mollicutes Class in 17.64% of the samples (3/17). The results confirmed Mycoplasma spp. DNA in conjunctiva, palate and cloaca from the wild birds analyzed. This is the first record of Mycoplasma spp. in captive psittacines from northeastern Brazil.


Assuntos
Animais , Mycoplasma gallisepticum , Mycoplasma synoviae , Papagaios , Tenericutes , Eletroforese/veterinária , Infecções Bacterianas/veterinária
12.
Arq. bras. med. vet. zootec. (Online) ; 68(1): 113-118, jan.-fev. 2016. tab, graf
Artigo em Português | VETINDEX | ID: vti-334153

RESUMO

Objetivou-se com este estudo investigar a ocorrência de Mycoplasma spp., Mycoplasma galissepticum (MG) e Mycoplasma synoviae (MS) em psitacídeos de cativeiro localizado no estado de Pernambuco, Brasil. Foram estudadas 85 aves provenientes do Parque Estadual Dois Irmãos, localizado no estado do Pernambuco, Brasil. De cada psitacídeo analisado foram obtidas três amostras por meio de swabs da cloaca, palato e conjuntiva totalizando 255 amostras. As amostras coletadas foram submetidas à extração de DNA e à reação em cadeia da polimerase (PCR), sendo as positivas submetidas ao isolamento em ágar Frey. O DNA de Mycoplasma spp. foi detectado em 16,47% (14/85) dos psitacídeos estudados. Das 255 amostras analisadas, 6,66% (17/255) foram positivas para a presença de Mycoplasma spp., sendo 41,18% (7/17) provenientes da conjuntiva, 35,29% (6/17) do palato e 23,53% (4/17) da cloaca. Nenhuma amostra foi positiva para MG ou MS na PCR. Os resultados obtidos permitem confirmar a presença do DNA de Mycoplasma spp. em conjuntiva, palato e cloaca nas aves estudadas. Foram detectadas colônias semelhantes a membros da classe Mollicutes em 17,64% das amostras (3/17). Esse é o primeiro relato da presença de Mycoplasma spp. em psitacídeos de cativeiro no Nordeste do Brasil.(AU)


The aim of this study was to investigate the occurrence of Mycoplasma spp., Mycoplasma galissepticum (MG) and Mycoplasma synoviae (MS) in captive psittacines. Eighty-five wild birds from Parque Estadual Dois Irmãos, Pernambuco state, northeastern Brazil, were used. From each psittacid analyzed three samples were obtained through cloaca, palate and conjunctiva swabs, totaling 255 samples. Samples collected were submitted to DNA extraction and Polimerase Chain Reaction (PCR). Mycoplasma spp. DNA was detected in 16.47% (14/85) of psittacines studied. From 255 samples, 6.66% (17/255) were positive for Mycoplasma spp.: 41.18% (7/17) of positivity in conjunctiva, 35.29% (6/17) in palate and 23.53% (4/17) in cloaca. There was no positive sample for MG or MS in PCR. Similar colonies were found for members of the Mollicutes Class in 17.64% of the samples (3/17). The results confirmed Mycoplasma spp. DNA in conjunctiva, palate and cloaca from the wild birds analyzed. This is the first record of Mycoplasma spp. in captive psittacines from northeastern Brazil.(AU)


Assuntos
Animais , Mycoplasma gallisepticum , Mycoplasma synoviae , Papagaios , Tenericutes , Infecções Bacterianas/veterinária , Eletroforese/veterinária
13.
J Toxicol Environ Health A ; 78(17): 1083-93, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26291643

RESUMO

Chresta martii (Asteraceae), found in the Xingó region, northeastern Brazil, is used in the treatment of gastrointestinal (GIT) and liver disorders and malaria. However, there are few studies regarding efficacy and safety of use for this species. Thus, the objective of this study was to determine in vivo acute toxicity and in vitro cytotoxicity of organic extracts of C. martii as well as in vivo genotoxicity of its semipurified fraction. Dried aerial parts of C. martii were extracted using three organic solvents (cyclohexane [ECCm], ethyl acetate [EACm], and ethanol [EECm]), and these extracts were examined for acute toxicity (50-2000 mg/kg ip or po) and cytotoxicity (50 µg/ml) in carcinogenic human cell lines (HL-60, NCIH-292, and MCF-7). The EACm, which showed evidence of toxicity (in vivo and in vitro), was fractionated on a silica column, yielding four fractions (F1-F4). The F1 was utilized for genotoxicity (50 mg/kg ip), by in vivo micronucleus (MN) assay. ECCm showed no indication of acute toxicity or occurrence of death, while the LD50 estimated for the extracts (EACm and EECm) was 500 mg/kg po and 200 mg/kg ip. The EACm (50 µg/ml) inhibited growth of tumor cells HL-60 (96.54%), NCIH-292 (73.43%), and MCF-7 (15%). The F1 fraction induced MN formation in polychromatic erythrocytes of Swiss Webster mice. Organic extracts from C. martii exhibited acute toxicity classified as mild to moderate, in addition to cytotoxicity (in vitro), while the F1 semipurified fraction induced genotoxicity (in vivo).


Assuntos
Asteraceae/química , Dano ao DNA/efeitos dos fármacos , Extratos Vegetais/toxicidade , Testes de Toxicidade Aguda , Animais , Brasil , Linhagem Celular Tumoral , Relação Dose-Resposta a Droga , Feminino , Células HL-60 , Humanos , Dose Letal Mediana , Células MCF-7 , Masculino , Camundongos , Testes para Micronúcleos , Compostos Fitoquímicos/análise
14.
Artigo em Inglês | MEDLINE | ID: mdl-15313443

RESUMO

Metalloproteinases (MPs) are Zn(+)-dependent endoproteolytic enzymes, abundant in crotalid and viperid snake venoms. Most snake venom metalloproteinases (svMPs) are active on extracellular matrix components and this effect is thought to result in bleeding as a consequence of the basement membrane disruption in capillaries. Jararhagin and ACLH are hemorrhagic svMPs from Bothrops jararaca and Agkistrodon contortrix laticinctus venom, respectively. Both enzymes demonstrate proteolytic activity on fibrinogen and fibronectin and jararhagin inhibits collagen-induced platelet aggregation in vitro. This work describes the expression, purification and successful refolding of the recombinant ACLH zymogen (rPRO-ACLH) as well as the catalytic domain of jararhagin (rCDJARA). The heterologous proteins were produced in E. coli, an in vivo expression system that does not make post-translational modifications. The recombinant refolded proteins did not show any hemorrhagic activity in mice skin, as well as the native deglycosylated jararhagin and ACLH. However, they preserved their proteolytic activity on fibrinogen and fibronectin. It seems that the hemorrhagic properties of these hemorrhagins are dependent on post-translational modifications, whereas their proteolytic activity is not dependent on such modifications.


Assuntos
Venenos de Crotalídeos/metabolismo , Venenos de Crotalídeos/toxicidade , Hemorragia/induzido quimicamente , Metaloproteases/metabolismo , Metaloproteases/toxicidade , Processamento de Proteína Pós-Traducional/fisiologia , Agkistrodon/fisiologia , Animais , Bothrops/fisiologia , Metaloendopeptidases/metabolismo , Metaloendopeptidases/toxicidade , Camundongos , Conformação Proteica , Proteínas Recombinantes/metabolismo , Proteínas Recombinantes/toxicidade , Pele/efeitos dos fármacos , Veneno de Bothrops jararaca
16.
Arq. bras. cardiol ; Arq. bras. cardiol;38(1): 55-8, 1982. ilus
Artigo em Português | LILACS | ID: lil-7407

RESUMO

Descrevem-se dois casos de aneurisma arteriovenoso do pulmao, em pacientes do sexo feminino e com idades de 18 e 23 anos. As pacientes eram intensamente cianoticas, mas nao havia evidencia de cardiopatia congenita. O diagnostico, suspeitado pelo aspecto radiografico de multiplas opacificacoes saculares, foi confirmado atraves de angiografia pulmonar. As lesoes localizavam-se no lobo medio em um caso e, no lobo inferior esquerdo, no outro. Ambas as doentes foram tratadas com sucesso por lobectomia. Discutem-se os principais aspectos patologicos e clinicos dessa doenca


Assuntos
Artéria Pulmonar , Veias Pulmonares , Fístula Arteriovenosa
20.
São Paulo; SMS; s.d. 1 p.
Não convencional em Português | Coleciona SUS, CRSCENTROOESTE-Producao, Sec. Munic. Saúde SP, Sec. Munic. Saúde SP | ID: biblio-939811
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA