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Bacillus subtilis induces morphological changes in Fonsecaea pedrosoi in vitro resulting in more resistant fungal forms in vivo J. Venom. Anim. Toxins incl. Trop. Dis.
Machado,AP; Anzai,M; Fischman,O.
Interactions among microorganisms may be the cause of morphological modifications, particularly in fungal cells. The aim of this work was to examine the changes that occur in cells of the fungus Fonsecaea pedrosoi after in vitro co-culturing with Bacillus subtilis and to explore the results of this interaction in vivo in an experimental murine infection. B. subtilis strain was inoculated into a 15-day pure culture of F. pedrosoi. In vitro, after 48 hours of co-culturing, the fungal cells were roundish. The secretion of fungal dark pigments and production of terminal chlamydoconidia were observed in hyphae after one week. In the in vivo study, two animal groups of 30 BALB/c mice each were employed. One group was inoculated intraperitoneally with hyphal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacillus subtilis; Fonsecaea pedrosoi; Microbial interaction; Co-culture; Fungal antagonism.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000400009
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Bioprotective Effect of Lactococcus piscium CNCM I-4031 Against Listeria monocytogenes Growth and Virulence ArchiMer
Saraoui, Taous; Leroi, Francoise; Chevalier, Frederique; Cappelier, Jean-michel; Passerini, Delphine; Pilet, Marie-france.
Listeria monocytogenes is a Gram-positive pathogen occurring in many refrigerated ready-to-eat foods. It is responsible for foodborne listeriosis, a rare but severe disease with a high mortality rate (20–30%). Lactococcus piscium CNCM I-4031 has the capacity to prevent the growth of L. monocytogenes in contaminated peeled and cooked shrimp and in a chemically defined medium using a cell-to-cell contact-dependent mechanism. To characterize this inhibition further, the effect of L. piscium was tested on a collection of 42 L. monocytogenes strains. All strains were inhibited but had different sensitivities. The effect of the initial concentration of the protective and the target bacteria revealed that the inhibition always occurred when L. piscium had reached...
Tipo: Text Palavras-chave: Biopreservation; Lactococcus piscium; Listeria monocytogenes; Co-culture; Cell ratio; Scanning electron microscopy; Virulence.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00449/56065/57588.pdf
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Co-culture of chondrocytes and bone marrow mesenchymal stem cells in vitro enhances the expression of cartilaginous extracellular matrix components BJMBR
Qing,Chang; Wei-ding,Cui; Wei-min,Fan.
Chondrocytes and bone marrow mesenchymal stem cells (BMSCs) are frequently used as seed cells in cartilage tissue engineering. In the present study, we determined if the co-culture of rabbit articular chondrocytes and BMSCs in vitro promotes the expression of cartilaginous extracellular matrix and, if so, what is the optimal ratio of the two cell types. Cultures of rabbit articular chondrocytes and BMSCs were expanded in vitro and then cultured individually or at a chondrocyte:BMSC ratio of 4:1, 2:1, 1:1, 1:2, 1:4 for 21 days and cultured in DMEM/F12. BMSCs were cultured in chondrogenic induction medium. Quantitative real-time RT-PCR and Western blot were used to evaluate gene expression. In the co-cultures, type II collagen and aggrecan expression...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Co-culture; Bone mesenchymal stem cells; Chondrocytes; Tissue engineering.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000400006
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Co-culture of Mouse Two-cell Embryos on Human Endometrial Stromal Cells in Proliferative and Secretory Phases International Journal of Morphology
Fakheri,Taravat; Nankali,Anisodowleh; Khazaei,Mozafar; Ghanbari,Ali; Abedini,Mehrandokht; Saeidiborojeni,Hamidreza.
There were no significant differences in the distribution of embryos reaching to 2- cells, 4- cells, morula or blastocysts culturing on human endometrial stromal cells (Secretory or proliferative phases). The percent of morula in stage A (without fragmentation), stage B (<25% fragmentation), stage C (25-50% fragmentation) and stage D (&gt;50% fragmentation) and did not showed significant differences between two coculture groups. Thus, the phase that the endometrial stromal cells were in thereby did not affect on the quality of embryos.
Tipo: Journal article Palavras-chave: Co-culture; Embryo; Endometrium; Mice; Proliferative phase; Secretory phase.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400014
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Expression of virulence genes by Listeria monocytogenes J0161 in natural environment BJM
Tirumalai,Prem Saran; Prakash,Soam.
Majority of studies concerning the gene expression of Listeria monocytogenes have been done on pure culture states. Our objective was to study L.monocytogenes in a co-cultured state and to understand if microbes in their natural state of existence are different in their expression than that of the purely cultured lab grown forms. For a long period discussions have been on the expression of prfA, (which is a virulence gene regulator) in a mammalian host and its role in causing the switch from a saprophytic to pathogenic form of L.monocytogenes. We, in this paper for the first time report the expression of prfA and other virulence genes by L.monocytogenes under different extracellular conditions, and also as a pure culture biofilms, that is different from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Listeria monocytogenes; PrfA; Virulence; Microarray; Biofilms; Co-culture; Gene Expression.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200050
Registros recuperados: 5
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