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Cryptococcal cell morphology affects host cell interactions and pathogenicity
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نویسنده
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okagaki l.h. ,strain a.k. ,nielsen j.n. ,charlier c. ,baltes n.j. ,chrétien f. ,heitman j.h. ,dromer f. ,nielsen k.n.
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منبع
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plos pathogens - 2010 - دوره : 6 - شماره : 6
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چکیده
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Cryptococcus neoformans is a common life-threatening human fungal pathogen. the size of cryptococcal cells is typically 5 to 10 fim. cell enlargement was observed in vivo,producing cells up to 100 fim. these morphological changes in cell size affected pathogenicity via reducing phagocytosis by host mononuclear cells,increasing resistance to oxidative and nitrosative stress,and correlated with reduced penetration of the central nervous system. cell enlargement was stimulated by coinfection with strains of opposite mating type,and ste3ad pheromone receptor mutant strains had reduced cell enlargement. finally,analysis of dna content in this novel cell type revealed that these enlarged cells were polyploid,uninucleate,and produced daughter cells in vivo. these results describe a novel mechanism by which c. neoformans evades host phagocytosis to allow survival of a subset of the population at early stages of infection. thus,morphological changes play unique and specialized roles during infection. © 2010 okagaki et al.
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آدرس
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department of microbiology,medical school,university of minnesota,minneapolis,mn, United States, department of microbiology,medical school,university of minnesota,minneapolis,mn, United States, department of pathology and laboratory medicine,school of medicine,university of north carolina at chapel hill,chapel hill,nc, United States, institut pasteur,unité de mycologie moléculaire and cnrs ura3012,paris, France, department of microbiology,medical school,university of minnesota,minneapolis,mn, United States, institut pasteur,unité de mycologie moléculaire and cnrs ura3012,paris,france,faculté de médecine,université paris xii,aphp hôpital henri mondor and inserm u955 team10,paris, France, departments of molecular genetics and microbiology,medicine,and pharmacology and cancer biology,duke university medical center,durham,nc, United States, institut pasteur,unité de mycologie moléculaire and cnrs ura3012,paris, France, department of microbiology,medical school,university of minnesota,minneapolis,mn, United States
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Authors
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