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Common and form-specific cell wall antigens of Candida albicans as released by chemical and enzymatic treatments

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Abstract

In order to investigate the antigenic properties of the proteins and mannoproteins present in the cell surface of Candida albicans, and to identify individual antigenic moieties and their distribution, a number of polyclonal antisera were obtained by immunizing rabbits with chemical and enzymatic cell wall extracts obtained from intact cells from both growth forms (yeast and mycelium) of the fungus. Prior to injection, wall moieties present in the extracts were subjected to different treatments and/or purification procedures such as adsorption onto polystyrenelatex microbeads or electrophoretic separation. When used as probes in indirect immunofluorescence assays, the different antisera gave rise to different fluorescence patterns varying in intensity and topological localization of the reactivity in C. albicans cells. When the different antisera were used as probes in Western blots of wall proteinaceous materials solubilized from both blastospores and germ tubes, differences in reactivity and specificity were readily discernible, allowing to identify a number of common and form-specific cell wall components. Of special interest was the fact that one of the antisera raised, after adsorption onto heat-killed blastospores, specifically recognized medium to low molecular weight moieties present only in the cell wall extracts from germ tubes. When this antiserum was used as probe in immunofluorescence assays, reactivity was confined to the hyphal extensions. Together, these observations seem to indicate that the different antibody preparations described in this report could represent important tools in the study of different aspects of the cell wall biology in C. albicans, including the identification and study of the distribution of common and form-specific cell wall-bound antigens.

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Abbreviations

IIF:

Indirect immunofluorescence

SDS-PAGE:

sodium dodecyl sulphate-polyacrylamide gel electrophoresis

PAb:

polyclonal antibody

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Authors and Affiliations

  1. Department of Microbiology & Immunology, Texas Tech University Health Sciences Center, Lubbock, Texas, USA

    José L. López-Ribot

  2. Departamento de Microbiología & Ecología, Facultad de Farmacia, Universitat de Valéncia, Avda. Vicent Andrés Estellés s/n, Burjassot, Valencia, Spain

    Manuel Casanova, M. Luisa Gil & José P. Martínez

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  1. José L. López-Ribot
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  2. Manuel Casanova
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  3. M. Luisa Gil
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  4. José P. Martínez
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Correspondence to José L. López-Ribot.

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López-Ribot, J.L., Casanova, M., Gil, M.L. et al. Common and form-specific cell wall antigens of Candida albicans as released by chemical and enzymatic treatments. Mycopathologia 134, 13–20 (1996). https://doi.org/10.1007/BF00437047

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  • DOI: https://doi.org/10.1007/BF00437047

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