A Predicted Mannoprotein Cmp1 Regulates Fungal Virulence in Cryptococcus neoformans
| Autor: | Tong-Bao Liu, Lian-Tao Han, Lei Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
capsule Mutant Cryptococcus Virulence lcsh:Medicine Article Microbiology Gentamicin protection assay medicine Immunology and Allergy mannoprotein Molecular Biology Gene Cryptococcus neoformans General Immunology and Microbiology biology Immunogenicity lcsh:R Cmp1 biology.organism_classification medicine.disease carbohydrates (lipids) virulence Infectious Diseases Cryptococcosis |
| Zdroj: | Pathogens Pathogens, Vol 9, Iss 881, p 881 (2020) Volume 9 Issue 11 |
| ISSN: | 2076-0817 |
| Popis: | The capsule of the fungal pathogen Cryptococcus neoformans consists of glucuronoxylomannan (GXM), glucuronoxylomannogalactan (GXMGal), and mannoproteins (MPs). MPs are a kind of glycoproteins with low content but high immunogenicity, which can stimulate the immune protection of the host. However, there is not much information about the role of mannoproteins in virulence of the human fungal pathogen C. neoformans. In this study, we reported the identification and functional analysis of a predicted mannoprotein Cmp1 that regulates fungal virulence in C. neoformans. Gene expression pattern analysis indicates that the CMP1 gene was ubiquitously expressed at all stages of cryptococcal development. Subcellular localization analysis indicated that Cmp1 was localized in the cytoplasm of cryptococcal cells. Disruption or overexpression of CMP1 results in impairing capsule formation in Cryptococcus, but it does not affect the melanin production and sensitivity under various stress conditions, nor does it affect the sexual reproduction process of Cryptococcus. Survival assay showed that the pathogenicity of the cmp1&Delta mutant or the CMP1 overexpression strain was significantly attenuated in a murine inhalation model of cryptococcosis. In conclusion, our findings implied that the mannoprotein Cmp1 is required for the virulence of C. neoformans. |
| Databáze: | OpenAIRE |
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