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Influence of aeration of Candida albicans during culturing on their surface aggregation in the presence of adhering Streptococcus gordonii

Identifieur interne : 007440 ( Istex/Corpus ); précédent : 007439; suivant : 007441

Influence of aeration of Candida albicans during culturing on their surface aggregation in the presence of adhering Streptococcus gordonii

Auteurs : Kevin W. Millsap ; Rolf Bos ; Henny C. Van Der Mei ; Henk J. Busscher

Source :

RBID : ISTEX:EAD462CAF939E29FB12F03F34A63BAB4B0E2DD09

English descriptors

Abstract

Abstract: Candida albicans surfaces are extremely sensitive to changes in growth conditions. In this study, adhesion to glass of aerated and non-aerated C. albicans ATCC 10261 in the presence and absence of adhering Streptococcus gordonii NCTC 7869 was determined in a parallel plate flow chamber. In addition, the influence of aeration on the yeast cell surface hydrophobicity, surface charge, and elemental cell surface composition was measured. S. gordonii adhering at the glass surface caused a reduction in the initial deposition rate of C. albicans, regardless of aeration. In a stationary end-point, only adhesion of non-aerated C. albicans was suppressed by the adhering S. gordonii. Non-aerated yeasts had a higher O/C elemental surface concentration ratio, indicative of cell surface polysaccharides, than aerated yeasts, at the expense of nitrogen-rich cell surface proteins. Both yeasts were essentially uncharged, but the nitrogen-rich cell surface of aerated yeasts had a slightly higher water contact angle than non-aerated yeasts. Summarizing, this study suggests that highly localized, hydrophobic cell surface proteins on C. albicans are a prerequisite for their interaction with adhering streptococci.

Url:
DOI: 10.1016/S0928-8244(99)00124-8

Links to Exploration step

ISTEX:EAD462CAF939E29FB12F03F34A63BAB4B0E2DD09

Le document en format XML

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<div type="abstract" xml:lang="en">Abstract: Candida albicans surfaces are extremely sensitive to changes in growth conditions. In this study, adhesion to glass of aerated and non-aerated C. albicans ATCC 10261 in the presence and absence of adhering Streptococcus gordonii NCTC 7869 was determined in a parallel plate flow chamber. In addition, the influence of aeration on the yeast cell surface hydrophobicity, surface charge, and elemental cell surface composition was measured. S. gordonii adhering at the glass surface caused a reduction in the initial deposition rate of C. albicans, regardless of aeration. In a stationary end-point, only adhesion of non-aerated C. albicans was suppressed by the adhering S. gordonii. Non-aerated yeasts had a higher O/C elemental surface concentration ratio, indicative of cell surface polysaccharides, than aerated yeasts, at the expense of nitrogen-rich cell surface proteins. Both yeasts were essentially uncharged, but the nitrogen-rich cell surface of aerated yeasts had a slightly higher water contact angle than non-aerated yeasts. Summarizing, this study suggests that highly localized, hydrophobic cell surface proteins on C. albicans are a prerequisite for their interaction with adhering streptococci.</div>
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<note type="content">Fig. 1: Example of the adhesion of non-aerated C. albicans ATCC 10261 grown at 37°C to glass with and without adhering S. gordonii NCTC 7869. Bar represents 25 μm.</note>
<note type="content">Table 1: Initial deposition rates on glass for the total number of yeasts adhering (j0,total), and single yeasts (j0,singles), together with the stationary end-point adhesion (n2h), and average aggregate size in yeast numbers (size) for aerated and non-aerated C. albicans ATCC 10261 grown at 37°C in the absence and presence of adhering S. gordonii NCTC 7869</note>
<note type="content">Table 2: Water contact angles (θW), zeta potentials (ζ), and the elemental surface composition as determined by XPS for aerated and non-aerated C. albicans ATCC 10261 cultured at 37°C in YM</note>
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<abstract lang="en">Abstract: Candida albicans surfaces are extremely sensitive to changes in growth conditions. In this study, adhesion to glass of aerated and non-aerated C. albicans ATCC 10261 in the presence and absence of adhering Streptococcus gordonii NCTC 7869 was determined in a parallel plate flow chamber. In addition, the influence of aeration on the yeast cell surface hydrophobicity, surface charge, and elemental cell surface composition was measured. S. gordonii adhering at the glass surface caused a reduction in the initial deposition rate of C. albicans, regardless of aeration. In a stationary end-point, only adhesion of non-aerated C. albicans was suppressed by the adhering S. gordonii. Non-aerated yeasts had a higher O/C elemental surface concentration ratio, indicative of cell surface polysaccharides, than aerated yeasts, at the expense of nitrogen-rich cell surface proteins. Both yeasts were essentially uncharged, but the nitrogen-rich cell surface of aerated yeasts had a slightly higher water contact angle than non-aerated yeasts. Summarizing, this study suggests that highly localized, hydrophobic cell surface proteins on C. albicans are a prerequisite for their interaction with adhering streptococci.</abstract>
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<note type="content">Table 2: Water contact angles (θW), zeta potentials (ζ), and the elemental surface composition as determined by XPS for aerated and non-aerated C. albicans ATCC 10261 cultured at 37°C in YM</note>
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