1. Detection of a fas-l-like protein in Candida albicans
- Author
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Department of Biology, John T. Ford, Department of Biology, and John T. Ford
- Abstract
In the past decade, interest in identifying the organisms that live in and on the human body, otherwise known as the microbiome, and understanding how these organisms interact with and affect their hosts has intensified. Candida albicans is an important human pathogen and member of this microbiome, most often found colonizing the mucous membranes of the gastrointestinal tract. Because of the niches it inhabits, C. albicans is prone to encountering immune cells and, as such, displays a variety of defense strategies against an immune response. Often this involves disguise and evasion rather than direct confrontation. However, observations from the literature point to a defense mechanism by which C. albicans might exploit the programmed cell death (apoptosis) pathway of host cells in which immune cells induce apoptosis of target cells through the interaction of a receptor (Fas) and its ligand (Fas-L). To further characterize this potential interaction, we designed a set of experiments to detect a Fas-L-like protein in the C. albicans cell wall. Adherence assay results demonstrated that C. albicans cells could bind to Fas. The interaction between Fas and the C. albicans cell wall was directly visualized using immunofluorescence assays, which showed that the interaction was specific. Additionally, DNA sequence analysis revealed a C. albicans protein with sequence similarity to a tumor necrosis factor ligand related to Fas-L. Taken together, our results combined with observations from the literature suggest the presence of a Fas-L-like protein in the C. albicans cell wall. Characterization of this protein will further our understanding of how this potential pathogen colonizes its host and sometimes causes disease.
- Published
- 2018