Journal
PLOS ONE
Volume 5, Issue 12, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0015968
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Funding
- Medical Research Council [G0601171]
- Wellcome Trust [088148MF]
- Darwin Trust
- Advantage West Midlands (AWM)
- Biotechnology and Biological Sciences Research Council [BB/H006605/1] Funding Source: researchfish
- Medical Research Council [G0601171] Funding Source: researchfish
- BBSRC [BB/H006605/1] Funding Source: UKRI
- MRC [G0601171] Funding Source: UKRI
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The human fungal pathogens Cryptococcus neoformans and C. gattii cause life-threatening infections of the central nervous system. One of the major characteristics of cryptococcal disease is the ability of the pathogen to parasitise upon phagocytic immune effector cells, a phenomenon that correlates strongly with virulence in rodent models of infection. Despite the importance of phagocyte/Cryptococcus interactions to disease progression, current methods for assaying virulence in the macrophage system are both time consuming and low throughput. Here, we introduce the first stable and fully characterised GFP-expressing derivatives of two widely used cryptococcal strains: C. neoformans serotype A type strain H99 and C. gattii serotype B type strain R265. Both strains show unaltered responses to environmental and host stress conditions and no deficiency in virulence in the macrophage model system. In addition, we report the development of a method to effectively and rapidly investigate macrophage parasitism by flow cytometry, a technique that preserves the accuracy of current approaches but offers a four-fold improvement in speed.
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