1. Cryptococcus neoformans Induces MCP-1 Release and Delays the Death of Human Mast Cells
- Author
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José Pedro Lopes, Marios Stylianou, Emelie Backman, Sandra Holmberg, Maria Ekoff, Gunnar Nilsson, and Constantin F. Urban
- Subjects
0301 basic medicine ,Microbiology (medical) ,030106 microbiology ,Immunology ,lcsh:QR1-502 ,Virulence ,mast cells ,Disease ,Biology ,Microbiology ,lcsh:Microbiology ,Microbiology in the medical area ,03 medical and health sciences ,Immune system ,Cellular and Infection Microbiology ,Mikrobiologi inom det medicinska området ,medicine ,Mast (botany) ,innate immunity ,Cryptococcus neoformans ,Innate immune system ,Immunology in the medical area ,food and beverages ,Brief Research Report ,biology.organism_classification ,medicine.disease ,In vitro ,humanities ,monocyte chemoattractant protein 1/CCL-2 ,030104 developmental biology ,Infectious Diseases ,Immunologi inom det medicinska området ,Cryptococcosis ,fungi ,monocytes - Abstract
Cryptococcosis, caused by the basidiomycete Cryptococcus neoformans, is a life-threatening disease affecting approximately one million people per year worldwide. Infection can occur when C. neoformans cells are inhaled by immunocompromised people. In order to establish infection, the yeast must bypass recognition and clearance by immune cells guarding the tissue. Using in vitro infections, we characterized the role of mast cells (MCs) in cryptococcosis. We found that MCs recognize C. neoformans and release inflammatory mediators such as tryptase and cytokines. From the latter group MCs released mainly CCL-2/MCP-1, a strong chemoattractant for monocytic cells. We demonstrated that supernatants of infected MCs recruit monocytes but not neutrophils. During infection with C. neoformans, MCs have a limited ability to kill the yeast depending on the serotype. C. neoformans, in turn, modulates the lifespan of MCs both, by presence of its polysaccharide capsule and by secreting soluble modulators. Taken together, MCs might have important contributions to fungal clearance during early stages of cryptocococis where these cells regulate recruitment of monocytes to mucosal tissues.
- Published
- 2019