Base de dados : LILACS
Pesquisa : D12.776.835 [Categoria DeCS]
Referências encontradas : 25 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 3 ir para página          

  1 / 25 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-1011407
Autor: Yin, Hongtao; Yu, Yan.
Título: Identification of the targets of hematoporphyrin derivative in lung adenocarcinoma using integrated network analysis
Fonte: Biol. Res;52:4, 2019. tab, graf.
Idioma: en.
Resumo: BACKGROUND: Hematoporphyrin derivative (HPD) has a sensibilization effect in lung adenocarcinoma. This study was conducted to identify the target genes of HPD in lung adenocarcinoma. METHODS: RNA sequencing was performed using the lung adenocarcinoma cell line A549 after no treatment or treatment with X-ray or X-ray + HPD. The differentially expressed genes (DEGs) were screened using Mfuzz package by noise-robust soft clustering analysis. Enrichment analysis was carried out using "BioCloud" online tool. Protein-protein interaction (PPI) network and module analyses were performed using Cytoscape software. Using WebGestalt tool and integrated transcription factor platform (ITFP), microRNA target and transcription factor (TF) target pairs were separately predicted. An integrated regulatory network was visualized with Cytoscape software. RESULTS: A total of 815 DEGs in the gene set G1 (continuously dysregulated genes along with changes in processing conditions [untreated-treated with X-ray-X-ray + treated with HPD]) and 464 DEGs in the gene set G2 (significantly dysregulated between X-ray + HPD-treated group and untreated/X-ray-treated group) were screened. The significant module identified from the PPI network for gene set G1 showed that ribosomal protein L3 (RPL3) gene could interact with heat shock protein 90 kDa alpha, class A member 1 (HSP90AA1). TFs AAA domain containing 2 (ATAD2) and protein inhibitor of activated STAT 1 (PIAS1) were separately predicted for the genes in gene set G1 and G2, respectively. In the integrated network for gene set G2, ubiquitin-specific peptidase 25 (USP25) was targeted by miR-200b, miR-200c, and miR-429. CONCLUSION: RPL3, HSP90AA1, ATAD2, and PIAS1 as well as USP25, which is targeted by miR-200b, miR-200c, and miR-429, may be the potential targets of HPD in lung adenocarcinoma.
Descritores: Derivado da Hematoporfirina/farmacologia
Redes Reguladoras de Genes/genética
Adenocarcinoma de Pulmão/genética
Neoplasias Pulmonares/genética
-Proteínas Ribossômicas/efeitos dos fármacos
Proteínas Ribossômicas/genética
Fatores de Transcrição
Análise por Conglomerados
Regulação Neoplásica da Expressão Gênica
Análise de Sequência de RNA
Proteínas de Choque Térmico HSP90/efeitos dos fármacos
Proteínas de Choque Térmico HSP90/genética
Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/efeitos dos fármacos
Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/genética
MicroRNAs/metabolismo
Linhagem Celular Tumoral
Proteínas de Ligação a DNA/efeitos dos fármacos
Proteínas de Ligação a DNA/genética
Proteínas Inibidoras de STAT Ativados/efeitos dos fármacos
Proteínas Inibidoras de STAT Ativados/genética
Citometria de Fluxo
ATPases Associadas a Diversas Atividades Celulares/efeitos dos fármacos
ATPases Associadas a Diversas Atividades Celulares/genética
Adenocarcinoma de Pulmão/tratamento farmacológico
Adenocarcinoma de Pulmão/radioterapia
Neoplasias Pulmonares/tratamento farmacológico
Neoplasias Pulmonares/radioterapia
Limites: Humanos
Responsável: CL1.1 - Biblioteca Central


  2 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Id: lil-401397
Autor: Padilla R., Carlos; Montoya P., Ysabel.
Título: Caracterización e inmunoreactividad de la proteína acídica ribosomal P2ß de L. (V.) braziliensis / Characterization and immunoreactivity of Leishmania braziliensis P2ß acidic ribosomal protein
Fonte: Rev. peru. med. exp. salud publica;20(2):92-96, abr.-jun. 2003. ilus.
Idioma: es.
Resumo: Introducción: El diagnóstico serológico de la Leishmaniasis usando proteínas totales presenta reacciones cruzadas. la caracterización de nuevos antígenos de Leishmania mejorará el uso de herramientas serológicas en el diagnóstico de esta enfermedad. Objetivo: Caracterizar un nuevo antígeno de Leishmania. Materiales y métodos: Se selecionó el bacteriófago T166-U19 de una biblioteca de cADN de L. (V.) Brasiliensis el cual es reactivo a mezclas de sueros de Leishmaniasis cutánea y mucocutánea. El cADN del clon T166-U19 fue subclonado en el plásmido pGEX, luego secuenciado y la proteína recombinante fue expresada.La reactividad de esta proteína reombnante se evaluó por ELISA. Resultados: El cADN del clon T166-U19 presentó un marco de lectura abierto de 318 pb que traduce una proteína de 105 animoácidos con 81,1 por ciento, 82,9 por ciento y 60,7 por ciento de identidad total con la proteína acídica ribosomal LiP de L. (L.) infantum, P2 de L.(L.) donovani, y P2 de T. cruzi, respectivamente. Además, la proteína recombinante presentó baja reactividad (50 por ciento) con sueros de pacientes con Leishmaniosis, mientras que presentó reactividad cruzada con sueros de pacientes chagásicos. Conclusiones: Se caracterizó por primera vez la proteína acídica ribosomal P2ß de L. (V.) brasiliensis, y presentando baja reactividad con sueros de pacientes con Leishmaniasis
Descritores: Leishmania braziliensis
Leishmaniose
Proteínas Ribossômicas
Responsável: PE14.1 - Biblioteca de la Sede Central


  3 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Id: lil-340756
Autor: De los Santos, Mary; Montoya, Ysabel.
Título: Identificación de una nueva proteína en Leishmania (Viannia) preuviana / Identification of a new protein in Leishmania (Viannia) peruviana
Fonte: Rev. med. exp;15(1/2):7-11, ene.-dic. 1998. ilus.
Idioma: es.
Resumo: El análisis de la secuencia nucleótidica y aminoacídica de un clon de la biblioteca de expresión en fagogt11 de Leishmania (Viannia) peruviana, estableció identidad parcial con los genes de las proteínas acídicas ribosomales P2 de Leishmania (Leishmania) infantum. Este hallazgo unido a ciertos dominios genómicos conservados, sugeridos de la comparación de 14 secuencias de otras proteínas P1 eucarióticas, confirman que la secuencia del inserto de clon codifica la proteína acídica ribosomal P1 de L. (V.) peruviana denominada LpP1. Este es el primer reporte sobre este tipo de proteína en el género Leishmania
Descritores: Leishmaniose
Leishmania
Proteínas Ribossômicas
Responsável: PE14.1 - Biblioteca de la Sede Central


  4 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-794640
Autor: do Valle Gomes-Gatto, Camila; Duarte, Fernanda Oliveira; Stotzer, Uliana Sbeguen; Rodrigues, Maria Fernanda Cury; de Andrade Perez, Sérgio Eduardo; Selistre-de-Araujo, Heloisa Sobreiro.
Título: Estrogen deficiency in ovariectomized rats: can resistance training re-establish angiogenesis in visceral adipose tissue?
Fonte: Clinics;71(9):528-536, Sept. 2016. tab, graf.
Idioma: en.
Projeto: CAPES; . CNPq.
Resumo: OBJECTIVE: The purpose of this study was to investigate the effects of resistance training on angiogenesis markers of visceral adipose tissue in ovariectomized rats. METHOD: Adult Sprague-Dawley female rats were divided into four groups (n=6 per group): sham-sedentary, ovariectomized sedentary, sham-resistance training and ovariectomized resistance training. The rats were allowed to climb a 1.1-m vertical ladder with weights attached to their tails and the weights were progressively increased. Sessions were performed three times per week for 10 weeks. Visceral adipose tissue angiogenesis and morphology were analyzed by histology. VEGF-A mRNA and protein levels were analyzed by real-time PCR and ELISA, respectively. RESULTS: Ovariectomy resulted in higher body mass (p=0.0003), adipocyte hypertrophy (p=0.0003), decreased VEGF-A mRNA (p=0.0004) and protein levels (p=0.0009), and decreased micro-vascular density (p=0.0181) in the visceral adipose tissue of the rats. Resistance training for 10 weeks was not able to attenuate the reduced angiogenesis in the visceral adipose tissue of the ovariectomized rats. CONCLUSION: Our findings indicate that the resistance training program used in this study could not ameliorate low angiogenesis in the visceral adipose tissue of ovariectomized rats.
Descritores: Condicionamento Físico Animal/fisiologia
Ovariectomia/métodos
Neovascularização Fisiológica/fisiologia
Gordura Intra-Abdominal/irrigação sanguínea
Estrogênios/deficiência
Treinamento de Força/métodos
-Proteínas Ribossômicas/análise
Fatores de Tempo
Ensaio de Imunoadsorção Enzimática
Imuno-Histoquímica
Biomarcadores/análise
Distribuição Aleatória
Reprodutibilidade dos Testes
Ratos Sprague-Dawley
Adipócitos/fisiologia
Receptor 2 de Fatores de Crescimento do Endotélio Vascular/análise
Fator A de Crescimento do Endotélio Vascular/análise
Gordura Intra-Abdominal/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Limites: Animais
Feminino
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


  5 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-712420
Autor: Benítez-Páez, Alfonso; Cárdenas-Brito, Sonia; Corredor, Mauricio; Villarroya, Magda; Armengod, María Eugenia.
Título: Impairing methylations at ribosome RNA, a point mutation-dependent strategy for aminoglycoside resistance: The rsmG case / Mutaciones en genes modificadores de ARN ribosómico y la resistencia a aminoglucósidos: el caso del gen rsmG
Fonte: Biomédica (Bogotá);34(supl.1):41-49, abr. 2014. ilus, tab.
Idioma: en.
Resumo: Introduction: Aminoglycosides like streptomycin are well-known for binding at specific regions of ribosome RNA and then acting as translation inhibitors. Nowadays, several pathogens have been detected to acquire an undefined strategy involving mutation at non structural ribosome genes like those acting as RNA methylases. rsmG is one of those genes which encodes an AdoMet-dependent methyltransferase responsible for the synthesis of m 7 G527 in the 530 loop of bacterial 16S rRNA. This loop is universally conserved, plays a key role in ribosomal accuracy, and is a target for streptomycin binding. Loss of the m 7 G527 modification confers low-level streptomycin resistance and may affect ribosomal functioning. Objectives: After taking into account genetic information indicating that some clinical isolates of human pathogens show streptomycin resistance associated with mutations at rsmG , we decided to explore new hot spots for mutation capable of impairing the RsmG in vivo function and of promoting low-level streptomycin resistance. Materials and methods: To gain insights into the molecular and genetic mechanism of acquiring this aminoglycoside resistance phenotype and the emergence of high-level streptomycin resistance in rsmG mutants, we mutated Escherichia coli rsmG and also performed a genotyping study on rpsL from several isolates showing the ability to grow at higher streptomycin concentrations than parental strains. Results: We found that the mutations at rpsL were preferentially present in these mutants, and we observed a clear synergy between rsmG and rpsL genes to induce streptomycin resistance. Conclusion: We contribute to understand a common mechanism that is probably transferable to other ribosome RNA methylase genes responsible for modifications at central sites for ribosome function.

Introducción. Los aminoglucósidos son moléculas antibióticas capaces de inhibir la síntesis de proteínas bacterianas tras su unión al ribosoma procariota. La resistencia a aminoglucósidos está clásicamente asociada a mutaciones en genes estructurales del ribosoma bacteriano; sin embargo, varios estudios recientes han demostrado, de forma recurrente, la presencia de un nuevo mecanismo dependiente de mutación que no involucra genes estructurales. El gen rsmG es uno de ellos y se caracteriza por codificar una metiltransferasa que sintetiza el nucleósido m 7 G527 localizado en el loop 530 del ribosoma bacteriano, este último caracterizado como sitio preferencial al cual se une la estreptomicina. Objetivo. Partiendo de las recientes asociaciones clínicas entre las mutaciones en el gen rsmG y la resistencia a estreptomicina, este estudio se propuso la caracterización de nuevos puntos calientes de mutación en este gen que puedan causar resistencia a estreptomicina usando Escherichia coli como modelo de estudio. Materiales y métodos. Se indagó sobre el mecanismo genético y molecular por el cual se adquiere la resistencia a estreptomicina y su transición a la resistencia a altas dosis mediante mutagénesis dirigida del gen rsmG y genotipificación del gen rpsL . Resultados. Se encontró que la mutación N39A en rsmG inactiva la proteína y se reportó un nuevo conjunto de mutaciones en rpsL que confieren resistencia a altas dosis de estreptomicina. Conclusiones. Aunque los mecanismos genéticos subyacentes permanecen sin esclarecer, se concluyó que dichos patrones secuenciales de mutación podrían tener lugar en otros genes modificadores del ARN bacteriano debido a la conservación evolutiva y al papel crítico que juegan tales modificaciones en la síntesis de proteínas.
Descritores: Aminoglicosídeos/farmacologia
Antibacterianos/farmacologia
Farmacorresistência Bacteriana/genética
Proteínas de Escherichia coli/genética
Mutação de Sentido Incorreto
Metiltransferases/genética
Mutação Puntual
Processamento Pós-Transcricional do RNA/genética
RNA Bacteriano/metabolismo
/metabolismo
RNA, RIBOSOMAL, ABNORMALITIES, MULTIPLES/metabolismo
Estreptomicina/farmacologia
-Sequência de Aminoácidos
Sítios de Ligação/genética
Domínio Catalítico/genética
Proteínas de Escherichia coli/química
Proteínas de Escherichia coli/metabolismo
Escherichia coli/efeitos dos fármacos
Escherichia coli/enzimologia
Metilação
Modelos Moleculares
Dados de Sequência Molecular
Metiltransferases/química
Metiltransferases/metabolismo
Filogenia
Conformação Proteica
RNA Bacteriano/genética
/genética
RNA, RIBOSOMAL, ABNORMALITIES, MULTIPLES/genética
Proteínas Recombinantes de Fusão/genética
Proteínas Recombinantes de Fusão/metabolismo
Proteínas Ribossômicas/genética
Proteínas Ribossômicas/metabolismo
S-Adenosilmetionina/metabolismo
Alinhamento de Sequência
Análise de Sequência de DNA
Deleção de Sequência
Homologia de Sequência de Aminoácidos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: CO332 - Facultad de Medicina


  6 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: lil-645593
Autor: García, Patricia; Allende, Fidel; Legarraga, Paulette; Huilcaman, Marcos; Solari, Sandra.
Título: Identificación bacteriana basada en el espectro de masas de proteínas: Una nueva mirada a la microbiología del siglo XXI / Bacterial identification based on protein mass spectrometry: A new insight at the microbiology of the 21st century
Fonte: Rev. chil. infectol;29(3):263-272, jun. 2012. graf, tab.
Idioma: es.
Resumo: Bacterial identification is important for the proper treatment of infected patients hospitalized with serious infections especially in critical care units. Identification by conventional methods used in microbiology laboratories takes at least 16 hours since a culture is positive. The introduction of mass spectrometry, specifically MALDI-TOF MS (matrix-assisted laser desorption/ ionization time-of-flight mass spectrometer) in the microbiology laboratory could mean a radical change in the identification accuracy, turn around time (6 minutes per bacteria) and cost (about 5 times cheaper than conventional identification). Since its introduction in clinical microbiology laboratories in 2008, many reports about its usefulness in identifying microorganisms from colonies, as well as directly from positive blood cultures and urine samples have been published. This review describes MALDI-TOF MS methodology, its identification performance for bacteria (aerobic and anaerobic), mycobacterium and yeasts, its future applications in microbiology and its main disadvantages.

La identificación bacteriana es muy importante en el manejo adecuado de los pacientes infectados, especialmente aquellos con infecciones graves hospitalizados en unidades de pacientes críticos. La identificación por los métodos convencionales utilizados en los laboratorios de microbiología clínica demora al menos 16 horas desde que un cultivo es positivo. La introducción de la espectrometría de masas, específicamente del espectrómetro de masas por tiempo de migración (tiempo de vuelo) con desorción/ionización laser asistida por una matriz (MALDI-TOF MS, por su sigla en inglés matrix-assisted laser desorption/ionization time-of-flight mass spectrometer), en el laboratorio de microbiología podría significar un cambio radical en la precisión de la identificación, el tiempo de detección (6 minutos por bacterias) y el costo (aproximadamente 5 veces más económico que la identificación convencional). Desde su introducción en los laboratorios de microbiología clínica en el año 2008, se han escrito numerosas publicaciones sobre su utilidad en la identificación de microorganismos desde colonias, así como directamente desde hemocultivos positivos y de muestras de orina. Esta revisión describe la metodología de MALDI-TOF MS, su rendimiento en la identificación de bacterias aerobias, anaerobias, micobacterias y levaduras, sus futuras aplicaciones en microbiología y sus principales desventajas.
Descritores: Bactérias/classificação
Proteínas de Bactérias/isolamento & purificação
Filogenia
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
-Bactérias/isolamento & purificação
Proteínas de Bactérias/sangue
Proteínas de Bactérias/urina
Bases de Dados de Proteínas
Espectrometria de Massas/tendências
Mycobacterium/classificação
Proteínas Ribossômicas/isolamento & purificação
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
Leveduras/classificação
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central


  7 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-634606
Autor: López, A. C.; De Ortúzar, R. V. M.; Alippi, A. M..
Título: Tetracycline and oxytetracycline resistance determinants detected in Bacillus cereus strains isolated from honey samples / Detección de determinantes de resistencia a tetraciclina y oxitetraciclina en cepas de Bacillus cereus aisladas de muestras de miel
Fonte: Rev. argent. microbiol;40(4):231-237, oct.-dic. 2008. ilus, tab.
Idioma: en.
Projeto: CIC (Comisión de Investigaciones Científicas de la Prov. de Bs. As., Argentina); . ANPCyT Argentina.
Resumo: The aim of this study was to investigate the presence of tetracycline and oxytetracycline resistance determinants in Bacillus cereus strains isolated from honey samples. Of a total of 77 isolates analyzed, 30 (39%) exhibited resistance to tetracyclines according to the results of a disk diffusion method. Resistant strains (n=30) were screened by PCR for the presence of the resistant determinants tetK, tetL, tetM, tetO, tetW, otrA and otrB and their MIC values for tetracycline, oxytetracycline and minocycline were assessed. According to the PCR results, 23 isolates (77%) presented at least one tetracycline or oxytetracycline resistance determinant. The tetK genotype was present in 10 isolates while the tetL, tetM, and otrA genotypes were present in 3, 2, and 5 isolates, respectively. In addition, 2 isolates of the tetK plus tetM genotype, 1 of the tetK plus tetL genotype, and 1 of the tetK plus otrA genotype were found. All isolates were tetW, tetO and otrB negatives. On the other hand, 7 isolates (23%) showed a tetracycline-resistant and/or minocyclineresistant phenotype (MIC) but did not carry any of the tet or otr determinants investigated in this study. This research has shown that B. cereus isolates from honey samples contain a variety of tetracycline and oxytetracycline resistance genes, including the tetK and tetL determinants which encode for efflux proteins, and tetM and otrA, which encode for ribosomal protection proteins. These findings indicate that strains isolated from honeys could represent a reservoir for tetracycline resistance genes. To our knowledge, this is the first report of tetracycline-resistant and oxytetracyclineresistant B. cereus strains carrying the tetK determinant, and also the first report of oxytetracycline-resistant and tetracycline- resistant Bacillus species carrying the otrA determinant.

El objetivo del presente estudio ha sido investigar la presencia de diversos determinantes de resistencia a tetraciclina y oxitetraciclina en las poblaciones de Bacillus cereus presentes en la miel. De un total de 77 aislamientos evaluados, 30 (39%) resultaron resistentes a tetraciclina y/o minociclina de acuerdo con los resultados de las pruebas de difusión en disco. Dentro del grupo que presentó un fenotipo resistente, se investigó la presencia de los determinantes tetK, tetL, tetM, tetO, tetW, otrA y otrB por PCR y se determinaron los valores de CIM para tetraciclina, oxitetraciclina y minociclina. De acuerdo con los resultados obtenidos por PCR, 23 aislamientos (77%) presentaron al menos un determinante de resistencia a tetraciclina o a oxitetraciclina; el genotipo tetK se encontró en 10 de esos aislamientos, mientras que los genotipos tetL, tetM y otrA se hallaron en 3, 2 y 5 aislamientos, respectivamente. Ningún aislamiento presentó los genotipos tetW, tetO ni otrB. Adicionalmente, se encontraron los genotipos tetK plus tetM (2 aislamientos); tetK plus tetL (1 aislamiento) y tetK plus otrA (1 aislamiento). Por otra parte, 7 cepas (23%) resultaron resistentes a tetraciclina, oxitetraciclina y/o minociclina por CIM, pero no presentaban ninguno de los determinantes tet u otr estudiados. Estos resultados indican la existencia de un alto porcentaje de cepas de B. cereus aisladas de miel con genes de resistencia a tetraciclina y oxitetraciclina, incluyendo los determinantes tetK, tetL, tetM y otrA. Este estudio constituye el primer registro de la presencia del determinante tetK de resistencia a tetraciclina en B. cereus, como así también la presencia del determinante otrA dentro del género Bacillus.
Descritores: Bacillus cereus/efeitos dos fármacos
Farmacorresistência Bacteriana Múltipla/genética
Mel/microbiologia
Fatores R/genética
Resistência a Tetraciclina/genética
-Antiporters/genética
Bacillus cereus/genética
Bacillus cereus/isolamento & purificação
Proteínas de Bactérias/genética
Genes Bacterianos
Genótipo
Itália
América Latina
Testes de Sensibilidade Microbiana
Minociclina/farmacologia
Oxitetraciclina/farmacologia
Proteínas Ribossômicas/genética
Amostragem
Tetraciclina/farmacologia
Estados Unidos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: AR1.2 - Instituto de Investigaciónes Epidemiológicas


  8 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-618048
Autor: Zhang, Lin; Hou, Yanhong; Wu, Kai; Li, Dan.
Título: Comparative proteomics analysis of chronic atrophic gastritis: changes of protein expression in chronic atrophic gastritis without Helicobacter pylori infection
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;45(3):273-283, Mar. 2012. ilus, tab.
Idioma: en.
Resumo: Chronic atrophic gastritis (CAG) is a very common gastritis and one of the major precursor lesions of gastric cancer, one of the most common cancers worldwide. The molecular mechanism underlying CAG is unclear, but its elucidation is essential for the prevention and early detection of gastric cancer and appropriate intervention. A combination of two-dimensional gel electrophoresis and mass spectrometry was used in the present study to analyze the differentially expressed proteins. Samples from 21 patients (9 females and 12 males; mean age: 61.8 years) were used. We identified 18 differentially expressed proteins in CAG compared with matched normal mucosa. Eight proteins were up-regulated and 10 down-regulated in CAG when compared with the same amounts of proteins in individually matched normal gastric mucosa. Two novel proteins, proteasome activator subunit 1 (PSME1), which was down-regulated in CAG, and ribosomal protein S12 (RPS12), which was up-regulated in CAG, were further investigated. Their expression was validated by Western blot and RT-PCR in 15 CAG samples matched with normal mucosa. The expression level of RPS12 was significantly higher in CAG than in matched normal gastric mucosa (P < 0.05). In contrast, the expression level of PSME1 in CAG was significantly lower than in matched normal gastric mucosa (P < 0.05). This study clearly demonstrated that there are some changes in protein expression between CAG and normal mucosa. In these changes, down-regulation of PSME1 and up-regulation of RPS12 could be involved in the development of CAG. Thus, the differentially expressed proteins might play important roles in CAG as functional molecules.
Descritores: Mucosa Gástrica/química
Gastrite Atrófica/metabolismo
Proteínas Musculares/genética
Proteômica
Complexo de Endopeptidases do Proteassoma/genética
Proteínas Ribossômicas/metabolismo
-Western Blotting
Doença Crônica
Regulação para Baixo
Eletroforese em Gel Bidimensional
Mucosa Gástrica/patologia
Gastrite Atrófica/genética
Helicobacter pylori
Espectrometria de Massas
Proteínas Musculares/metabolismo
Complexo de Endopeptidases do Proteassoma/metabolismo
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Proteínas Ribossômicas/genética
Regulação para Cima
Limites: Feminino
Humanos
Masculino
Pessoa de Meia-Idade
Tipo de Publ: Estudo Comparativo
Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


  9 / 25 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: lil-551366
Autor: Magomere, Titus O; Obukosia, Silas D; Mutitu, Eunice; Ngichabe, Christopher; Olubayo, Florence; Shibairo, Solomon.
Título: Molecular characterization of 'Candidatus Liberibacter' species/strains causing huanglongbing disease of citrus in Kenya
Fonte: Electron. j. biotechnol;12(2):5-6, Apr. 2009. ilus, tab.
Idioma: en.
Resumo: This study was undertaken to characterize the alpha subgroup of the proteobacteria causing the huanglongbing (HLB) disease of citrus from three different ecological zones of Kenya namely the Lower highlands (LH2, LH3, 1800-1900 m above sea level); Upper midlands (UM3, UM4, 1390-1475m), Lower midlands (LM5, LM4, LM3 of 1290-1340-1390m), by isolation and sequencing DNA encoding the L10 and L12 ribosomal proteins and the intergenic region. A 7I6-basepair DNA fragment was amplified and sequenced and consisted of 536 basepairs of DNA encoding the L10 protein, 44 basepairs of DNA intergenic region and 136 basepairs of DNA that partially encodes the L12 protein. Sequences of rpL10/L12 protein genes from Kenyan strains were 98 percent and 81 percent similar to the South African 'Candidatus Liberibacter africanus strain Nelspruit' and the Asian 'Candidatus Liberibacter asiaticus' strains, respectively. The intergenic rDNA sequence of Kenyan strain from UM and LM showed 84 percent similarity with 'Candidatus L. africanus strain Nelspruit' and 50 percent similarity with 'Candidatus L. asiaticus' strain. However, the LH strain had an 11- basepairs deletion, while the LM4 had a 5-basepair deletion in the intergenic region compared to 'Candidatus L. africanus strain Nelspruit'. The L10 amino acid sequence was 100 percent homologous among HLB bacteria obtained from the agro-ecological zones in Kenya and the L10 protein sequence was also homologus to 'Candidatus L. africanus strain Nelspruit'. Nevertheless, the L10 amino acid sequence of 'Candidatus L. asiaticus' and the 'Candidatus L. africanus subsp. capensis' differed from the Kenyan strains by 18.36 percent and 11.82 percent, respectively. Phylogenetic analysis of both the L10/L12 rDNA sequences and the L10 amino acid sequences clustered the Kenyan strains of the 'Candidatus Liberibacter' species with members of alpha subdivision of proteobacteria.
Descritores: DNA Ribossômico/agonistas
DNA Ribossômico/genética
Proteobactérias/enzimologia
Proteobactérias/metabolismo
Proteínas Ribossômicas
-Análise de Sequência de DNA/métodos
Análise de Sequência de DNA
Eletroforese em Gel de Ágar
Quênia
Filogenia
Responsável: CL1.1 - Biblioteca Central


  10 / 25 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Araújo, Flábio R
Soares, Cleber O
Texto completo
Id: lil-534165
Autor: Ramos, Carlos AN; Araújo, Flábio R; Souza, Ingrid IF; Oliveira, Renato HM; Elisei, Carina; Soares, Cleber O; Sacco, Ana MS; Rosinha, Grácia MS; Alves, Leucio C.
Título: Molecular and antigenic characterisation of ribosomal phosphoprotein P0 from Babesia bovis
Fonte: Mem. Inst. Oswaldo Cruz;104(7):998-1002, Nov. 2009. ilus.
Idioma: en.
Resumo: Babesia bovis is a tick-borne pathogen that remains an important constraint for the development of cattle industries in tropical and subtropical regions of the world. Effective control can be achieved by vaccination with live attenuated phenotypes of the parasite. However, these phenotypes have a number of drawbacks, which justifies the search for new, more efficient immunogens based mainly on recombinant protein technology. In the present paper, ribosomal phosphoprotein P0 from a Brazilian isolate of B. bovis was produced and evaluated with regard to conservation and antigenicity. The protein sequence displayed high conservation between different Brazilian isolates of B. bovis and several Apicomplexa parasites such as Theileria, Neospora and Toxoplasma. IgG from cattle experimentally and naturally infected with B. bovisas well as IgG1 and IgG2 from naturally infected cattle reacted with the recombinant protein. IgG from cattle experimentally infected with Babesia bigemina cross-reacted with B. bovis recombinant P0. These characteristics suggest that P0 is a potential antigen for recombinant vaccine preparations against bovine babesiosis.
Descritores: Antígenos de Protozoários/sangue
Babesia bovis/imunologia
Proteínas de Protozoários
Proteínas Ribossômicas
-Sequência de Aminoácidos
Anticorpos Antiprotozoários/sangue
Brasil
Babesia bovis/isolamento & purificação
Babesiose/imunologia
Babesiose/parasitologia
Babesiose/veterinária
Doenças dos Bovinos/imunologia
Doenças dos Bovinos/parasitologia
Imunoglobulina G/imunologia
Proteínas de Protozoários/genética
Proteínas de Protozoários/imunologia
Proteínas Recombinantes/genética
Proteínas Recombinantes/imunologia
Proteínas Ribossômicas/genética
Proteínas Ribossômicas/imunologia
Limites: Animais
Bovinos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



página 1 de 3 ir para página          
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde