Using in vivo transcriptomics and RNA enrichment to identify genes involved in virulence of Candida glabrata

Area of Science:

• Mycology
• Infectious Diseases
• Genomics

Background:

• Candida species are common opportunistic fungal pathogens.
• Candida albicans is well-studied, but Candida glabrata's infection mechanisms are less understood.
• Urinary tract infections (UTIs) are frequently caused by Candida species.

Purpose of the Study:

• To investigate the transcriptomic profile of Candida glabrata during urinary tract infection (UTI) in a mouse model.
• To identify genes and metabolic pathways crucial for C. glabrata virulence in vivo.
• To understand how C. glabrata adapts to host conditions during UTI.

Main Methods:

• Fungal RNA enrichment was used to analyze the transcriptome of C. glabrata.
• Transcriptomic analysis was performed on fungal samples from bladders and kidneys of infected mice.
• Virulence assays were conducted to validate the importance of identified genes.

Main Results:

• Nitrogen metabolism and regulation are vital for C. glabrata UTI.
• Genes involved in nitrogen metabolism, including DUR1,2 (urea amidolyase) and GAP1 (amino acid permease), were upregulated and important for virulence.
• The glyoxylate cycle is important in the host, with MLS1 (malate synthase) identified as a key virulence gene.

Conclusions:

• Candida glabrata utilizes specific metabolic pathways, including nitrogen metabolism and the glyoxylate cycle, for successful UTI.
• The study identifies key virulence factors in C. glabrata, such as DUR1,2, GAP1, and MLS1.
• In vivo transcriptomics provides crucial insights into the adaptation and pathogenicity of C. glabrata during infection.