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Title: A Histoplasma capsulatum Lipid Metabolic Map Identifies Antifungal Targets

Journal Article · · mBio (Online)
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  1. Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA, Division of Infectious Diseases, Department of Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
  2. Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
  3. Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, USA
  4. Department of Biology, Brigham Young University, Provo, Utah, USA
  5. Hematology Laboratory, Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA
  6. Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA

Lipids play a fundamental role in fungal cell biology, being essential cell membrane components and major targets of antifungal drugs. A deeper knowledge of lipid metabolism is key for developing new drugs and a better understanding of fungal pathogenesis. Here, we built a comprehensive map of the Histoplasma capsulatum lipid metabolic pathway by incorporating proteomic and lipidomic analyses. We performed genetic complementation and overexpression of H. capsulatum genes in Saccharomyces cerevisiae to validate reactions identified in the map and to determine enzymes responsible for catalyzing orphan reactions. The map led to the identification of both the fatty acid desaturation and the sphingolipid biosynthesis pathways as targets for drug development. We found that the sphingolipid biosynthesis inhibitor myriocin, the fatty acid desaturase inhibitor thiocarlide, and the fatty acid analog 10-thiastearic acid inhibit H. capsulatum growth in nanomolar to low-micromolar concentrations. These compounds also reduced the intracellular infection in an alveolar macrophage cell line. Overall, this lipid metabolic map revealed pathways that can be targeted for drug development.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; National Institutes of Health (NIH)
Grant/Contract Number:
AC05-76RL01830; R21 AI124797; P42 ES027704
OSTI ID:
1832247
Alternate ID(s):
OSTI ID: 1836231
Report Number(s):
PNNL-SA-152496; e02972-21
Journal Information:
mBio (Online), Journal Name: mBio (Online) Vol. 12 Journal Issue: 6; ISSN 2150-7511
Publisher:
American Society for MicrobiologyCopyright Statement
Country of Publication:
United States
Language:
English

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