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Related Experiment Videos

Candidiasis visualised by proteinase-directed immunofluorescence.

R Rüchel1, F Zimmermann, B Böning-Stutzer

  • 1Department of Medical Microbiology, University of Göttingen, Federal Republic of Germany.

Virchows Archiv. A, Pathological Anatomy and Histopathology
|January 1, 1991
PubMed
Summary

Secretory aspartic proteinases from Candida species are virulence factors in candidiasis. These proteinase antigens were detected in tissue, suggesting their diagnostic relevance in infections.

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Area of Science:

  • Microbiology
  • Immunology
  • Pathology

Background:

  • Secretory aspartic proteinases (SAPs) from Candida albicans and Candida tropicalis are implicated as virulence factors in fungal infections.
  • Candidiasis, a spectrum of infections caused by Candida species, can range from superficial mucosal to life-threatening deep-seated forms.

Purpose of the Study:

  • To investigate the presence and localization of candidal proteinase antigen in clinical tissue samples.
  • To evaluate the potential diagnostic relevance of candidal proteinase as a biomarker in candidiasis.

Main Methods:

  • Indirect immunofluorescence was employed to detect proteinase antigen.
  • Deparaffinized tissue sections from clinical cases of candidiasis were analyzed.
  • Analysis included examination of candidal cells and surrounding tissue microenvironments.

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Main Results:

  • Proteinase antigen was demonstrated on elements of both Candida albicans and Candida tropicalis in tissue sections.
  • A halo of fluorescence near candidal cells suggested enzyme secretion.
  • A ring of fluorescent material around kidney candidal colonies indicated potential alkaline denaturation of secreted enzyme due to fungal-generated pH gradients.

Conclusions:

  • Candidal secretory aspartic proteinases are present in infected tissues.
  • The detection of these proteinases supports their role as virulence factors.
  • Candidal proteinase antigen holds potential diagnostic value for candidiasis.