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Talaromyces marneffei

ABSTRACT: Pathogenic dimorphic fungus that causes penicilliosis

PROVIDER: PRJNA19563 | ENA |

REPOSITORIES: ENA

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Dataset's files

Source:

			Action	DRS
		Other
	ABAR01.dat.gz	Other
	ABAR01.fasta.gz	Fasta.gz
	ABAR01.master.dat	Other
	AGCC01.dat.gz	Other

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Talaromyces marneffei

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Project description:Although many studies have focused on dimorphic switching, noncoding RNAs in Talaromyces marneffei have been neglected until now. rRNA depletion RNA-seq with or without RNase R treatment were performed in mycelium and yeast conditions of Talaromyces marneffei by to unveil the functions of circRNAs in dimorphic switching.

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Talaromyces marneffei laccase modifies THP-1 macrophage responses.

Project description:Talaromyces (Penicillium) marneffei is an emerging opportunistic pathogen associated with HIV infection, particularly in Southeast Asia and southern China. The rapid uptake and killing of T. marneffei conidia by phagocytic cells along with the effective induction of an inflammatory response by the host is essential for disease control. T. marneffei produces a number of different laccases linked to fungal virulence. To understand the role of the various laccases in T. marneffei, laccase-encoding genes were investigated. Targeted single, double and triple gene deletions of laccases encoding lacA, lacB, and lacC showed no significant phenotypic effects suggesting redundancy of function. When a fourth laccase-encoding gene, pbrB, was deleted in the ?lacA ?lacB ?lacC background, the quadruple mutant displayed delayed conidiation and the conidia were more sensitive to H2O2, sodium dodecyl sulfate (SDS), and antifungal agents than wild-type and other transformants. Conidia of the quadruple mutant showed marked differences in their interaction with the human monocyte cell line, THP-1 such that phagocytosis was significantly higher when compared with the wild-type at one and 2 hours of incubation while the phagocytic index was significantly different from 15 to 120 minutes. In addition, killing of the quadruple mutant by THP-1 cells was more efficient at 2 and 4 hours of incubation. The levels of the proinflammatory cytokines TNF-?, IL-1? and IL-6 from THP-1 cells infected with the quadruple mutant were also significantly increased in comparison with wild-type. The results demonstrate that production of laccases by T. marneffei actually promotes the pathogen's resistance to innate host defenses.

| S-EPMC4991349 | biostudies-literature

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