Tight Junctions
Mostrando 1-12 de 194 artigos, teses e dissertações.
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1. Impact of acute undernutrition on growth, ileal morphology and nutrient transport in a murine model
Undernutrition represents a major public health challenge for middle- and low-income countries. This study aimed to evaluate whether a multideficient Northeast Brazil regional basic diet (RBD) induces acute morphological and functional changes in the ileum of mice. Swiss mice (∼25 g) were allocated into two groups: i) control mice were fed a standard diet
Braz J Med Biol Res. Publicado em: 10/10/2016
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2. Uso de aditivos e variação do aporte de alimentos na dieta de vacas em lactação sobre a composição e estabilidade do leite / Use of additives and variation of feeding levels in lactating Jersey cows on milk composition and its stability
Durante o período de 2010 e 2011 dois experimentos foram conduzidos na Embrapa Clima Temperado, em Capão do Leão/RS. O primeiro envolveu a adição de citrato de sódio e bicarbonato de sódio na dieta de vacas Jersey, com o intuito de verificar influência destes aditivos no controle da incidência de LINA, como alegado por parte da(s) indústria(s) come
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. Tumor necrosis factor alpha increases epithelial barrier permeability by disrupting tight junctions in Caco-2 cells
The objectives of this study were to determine the effect of tumor necrosis factor alpha (TNF-α) on intestinal epithelial cell permeability and the expression of tight junction proteins. Caco-2 cells were plated onto Transwell® microporous filters and treated with TNF-α (10 or 100 ng/mL) for 0, 4, 8, 16, or 24 h. The transepithelial electrical resistance
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-04
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4. Ocorrência e caracterização de eventos de invasão de linhagens celulares cultivadas in vitro por amostras de Escherichia coli enteropatogênica (EPEC) atípica. / Occurence and characterization of invasion events on cell lineages cultiveted in vitro by atypical Enteropathogenic Escherichia coli (EPEC).
Escherichia coli Enteropatogênica (EPEC) produz lesão attaching/effacing (A/E) em células eucarióticas mediada pela adesina de membrana externa intimina. EPEC são sub-agrupadas em típica (tEPEC) e atípica (aEPEC). Recentemente demonstramos que a amostra de aEPEC 1551-2 (sorotipo O não-tipável, não-móvel) invade células HeLa por um processo depend
Publicado em: 2009
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5. Efeitos da Luffa operculata sobre o epitélio do palato de rã: aspectos histológicos
Luffa operculata é o nome botânico da buchinha-do-norte ou cabacinha, uma planta medicinal usada popularmente no tratamento das rinites e rinossinusites. Na Europa e nos EUA, está em medicamentos homeopáticos. No Brasil, a infusão (chá) do fruto seco de Luffa operculata é utilizada para inalação ou instilação nasal, resultando em liberação profu
Revista Brasileira de Otorrinolaringologia. Publicado em: 2005-04
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6. Carbon nanotube structures: Y-junctions and nanorings
The possibility of coupling two Y-junctions of carbon nanotubes, forming a type of nanotube ring is addressed here. Recent experimental evidences of growing carbon nanotube structures forming basically Y-kind junctions give support to this theoretical proposition. A single-band tight-binding Hamiltonian is considered and local electronic properties are inves
Brazilian Journal of Physics. Publicado em: 2004-06
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7. "Efeitos da infusão de Luffa operculata sobre o epitélio e a atividade mucociliar do palato isolado de rã" / Effects of Luffa operculata infusion on the epithelium and the mucociliary activity of the isolated frog palate
Luffa operculata is a medicinal plant popularly used for treatment of rhinitis and rhinosinusitis. Its dry fruit infusion is used into the nose, delivering profuse mucous secretion, but may cause nasal mucosa irritation, epistaxis or anosmia. We evaluated the effects of different concentrations of Luffa operculata dry fruit infusion on mucociliary transport
Publicado em: 2004
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8. Intercellular junctions of the hen parathyroid gland. A freeze-fracture study.
The fine structure of the intercellular junctions of the hen parathyroid gland was studied using freeze-fracture replicas and thin sections. In the conventional thin sections, desmosomes, intermediate junctions (maculae adherentes) and gap junctions were observed, and in the lanthanum-fixed sections, tight junctions (maculae occludentes) were demonstrated as
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9. The coxsackievirus and adenovirus receptor is a transmembrane component of the tight junction
The coxsackievirus and adenovirus receptor (CAR) mediates viral attachment and infection, but its physiologic functions have not been described. In nonpolarized cells, CAR localized to homotypic intercellular contacts, mediated homotypic cell aggregation, and recruited the tight junction protein ZO-1 to sites of cell–cell contact. In polarized epithel
The National Academy of Sciences.
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10. Diversity among tight junctions in rat kidney: glomerular slit diaphragms and endothelial junctions express only one isoform of the tight junction protein ZO-1.
ZO-1 is a 225-kDa peripheral membrane protein present in all tight junctions. It was recently shown to consist of two isoforms that differ in the presence of an internal 80-amino acid domain termed motif-alpha. To obtain information on their distribution and potential functional significance we have localized the two isoforms in rat kidney by using antibodie
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11. Structure of tight junctions in epithelia with different permeability.
Freeze-fracture studies have shown a network of intramembrane fibrils in the tight junctions of epithelia. A direct correlation between the number of fibrils and junctional permeability has been suggested by previous studies. However, we have made two groups of observations showing that junctional permeability is not univocally related to the complexity of t
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12. The tight junction protein ZO-1 is homologous to the Drosophila discs-large tumor suppressor protein of septate junctions.
Tight junctions form an intercellular barrier between epithelial cells, serve to separate tissue compartments, and maintain cellular polarity. Paracellular sealing properties vary among cell types and are regulated by undefined mechanisms. Sequence of the full-length cDNA for human ZO-1, the first identified tight junction component, predicts a protein of 17