Titan cell production in Cryptococcus neoformans reshapes the cell wall and capsule composition during infection
| Autor: | Keunsook K. Lee, Darin L. Wiesner, Neil A. R. Gow, Jeanette Wagener, Liliane Mukaremera, Kirsten Nielsen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
030106 microbiology Cell Population Polysaccharide Applied Microbiology and Biotechnology Microbiology Article Cell wall 03 medical and health sciences Immune system In vivo medicine lcsh:QH573-671 education Molecular Biology Cryptococcus neoformans chemistry.chemical_classification education.field_of_study biology Chemistry lcsh:Cytology Cell Biology biology.organism_classification In vitro medicine.anatomical_structure |
| Zdroj: | The Cell Surface, Vol 1, Iss, Pp 15-24 (2018) |
| ISSN: | 2468-2330 |
| Popis: | Cryptococcus neoformans is a human fungal pathogen that often causes infections in immunocompromised individuals. Upon inhalation into the lungs C. neoformans differentiates into cells with altered size and morphology, including production of large titan cells. Titan cells possess thickened cell wall and dense, cross-linked capsule when compared to in vitro grown cells. In addition, titan cells have increased cell wall chitin that is associated with a detrimental anti-inflammatory immune response. Here we examined the cell wall and capsule composition of in vitro, in vivo typical-sized and in vivo titan cells using High Performance Liquid Chromatography (HPLC). The monomer composition of cell wall polysaccharides showed that in vivo C. neoformans cells contained more glucosamine and less glucose than in vitro cells, suggesting alteration in abundance of both chitin and glucans, respectively. Low levels of galactosamine were also detected in carbohydrates from both in vivo and vitro cells. Within the in vivo cell population, differences in the proportions of cell wall and capsule monomers between typical and titan cells were also observed. Taken together, these results demonstrate that C. neoformans reshapes its cell wall and capsule composition during infection. These cell wall and capsule alterations likely help C. neoformans escape recognition by, and allow modulation of, the host immune system. Keywords: C. neoformans, Cell wall, Capsule, Titan cells, Cryptococcus |
| Databáze: | OpenAIRE |
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