title: Identification of immunogenic proteins of Candida parapsilosis by serological proteome analysis.
abstract: OBJECTIVE
  Systemic candidiasis is the leading fungal bloodstream infection, and its incidence has been on the rise. Recently, Candida parapsilosis has emerged as an increasingly prevalent fungal pathogen, but little is known about its antigenic profile. Hence, the current work was performed to discover immunogenic proteins of C. parapsilosis using serological proteome analysis.
  
  
  RESULTS
  Cell wall proteins extracted from C. parapsilosis were resolved by two-dimensional electrophoresis followed by immunoblotting using antisera from experimentally infected mice. Mass spectrometry analysis of the 32 immunoreactive protein spots resulted in the identification of 12 distinct proteins. Among them, 11 proteins were known antigens of Candida albicans, whereas Idh2p was identified for the first time as an immunogenic protein of Candida species. Recombinant Idh2p was expressed in Escherichia coli, and its antigenicity was verified by immunoblot analysis.
  
  
  CONCLUSIONS
  An immunoproteomic approach was successfully applied to identify immunogenic proteins of C. parapsilosis, with Idh2p as a novel candidate antigen. The identified antigens may serve as potential biomarkers for development of diagnostic assay and/or vaccine for C. parapsilosis.
  
  
  CONCLUSIONS
  This work represents the first immunoproteomic analysis of C. parapsilosis, which provides new insights into host-pathogen interactions and pathogenesis of C. parapsilosis. The immunogenic proteins could be studied as biomarker candidates for C. parapsilosis.
authors.affiliation: Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
authors.forename: P Y
authors.initials: PY
authors.lastname: Lee
authors.forename: L H
authors.initials: LH
authors.lastname: Gam
authors.forename: V C
authors.initials: VC
authors.lastname: Yong
authors.forename: R
authors.initials: R
authors.lastname: Rosli
authors.forename: K P
authors.initials: KP
authors.lastname: Ng
authors.forename: P P
authors.initials: PP
authors.lastname: Chong
mesh_terms: D000818:Animals; D000946:Antigens, Fungal / Q000235:genetics / Q000276:immunology; D002175:Candida / Q000235:genetics / Q000276:immunology*; D002177:Candidiasis / Q000276:immunology / Q000382:microbiology; D002473:Cell Wall / Q000276:immunology; D005656:Fungal Proteins / Q000276:immunology*; D007106:Immune Sera; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D020543:Proteome / Q000235:genetics / Q000276:immunology*; D040901:Proteomics
chemical_list: D000946:Antigens, Fungal; D005656:Fungal Proteins; D007106:Immune Sera; D020543:Proteome
keywords: Candida parapsilosis; antigen; cell wall proteins; immunoproteomic