Equatorial ring-like channels in the Cryptococcus neoformans polysaccharide capsule

FEMS Yeast Res. 2006 Jun;6(4):662-6. doi: 10.1111/j.1567-1364.2006.00070.x.

Abstract

Under certain conditions, India ink particles can penetrate the capsule of the opportunistic pathogen Cryptococcus neoformans. India ink penetration gave two distinct patterns, one as a ring in the middle of the capsule, and another as a double spot located at opposite poles of the cells. These spots were perpendicularly orientated to the bud. This pattern suggests the existence of a localized structure deep in the capsule that can accumulate large insoluble particles. Although the mechanisms responsible for the assemblage and maintenance of ring-like channels are not understood, their existence deep within the capsule implies a new level of complexity for this enigmatic structure.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Carbon
  • Cryptococcosis / microbiology
  • Cryptococcus neoformans / metabolism
  • Cryptococcus neoformans / ultrastructure*
  • Humans
  • Mice
  • Microscopy, Confocal
  • Polysaccharides / ultrastructure*

Substances

  • Polysaccharides
  • chinese ink
  • Carbon