Candida albicans germ tube antibodies disclose invasive candidiasis biomarkers

The cytoplasmic coatomer subunit gamma can be a biomarker for invasive candidiasis

Specific antibodies of invasive candidiasis target a Candida metallo-aminopeptidase

Diagnostic potential of a hyphally regulated cell wall protein 1 subterminal region

The detection of patterns associated with the invasive form of Candida albicans, such as Candida albicans germ tube antibodies (CAGTA), is a useful complement to blood culture for Invasive Candidiasis (IC) diagnosis. As CAGTA are detected by a non-standardisable and non-automatable technique, a Candida albicans cDNA expression library was screened with CAGTA isolated from serum of an animal model of invasive candidiasis, and five protein targets were identified: hyphally regulated cell wall protein 1 (Hyr1), enolase 1 (Eno1), coatomer subunit gamma (Sec21), a metallo-aminopeptidase (Ape2) and cystathionine gamma-lyase (Cys3). Homology with proteins from other organisms rules out Cys3 as a good biomarker while Sec21 results suggest that it is not in the germ tubes surface but secreted to the external environment. Our analysis propose Ape2, Sec21 and a region of Hyr1 different from the one currently being studied for immunoprotection as potential biomarker candidates for the diagnosis of IC.

Invasive candidiasis

Candida albicans

CAGTA

Biomarkers

Candida albicans germ tube antibodies

CAGTA enriched fraction

CAGTA purified fraction

coatomer subunit gamma

cystathionine gamma-lyase

E. coli lysed with non-recombinant Lambda ZAP II phage

hyphally regulated cell wall protein 1

indirect immunofluorescence

intraabdomial candidiasis

invasive fungal infection

metallo-aminopeptidase

© 2024 The Authors. Published by Elsevier Inc.