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Hemolysin chrysolysin from Penicillium chrysogenum promotes inflammatory response

Maura Donohue1, Yongjoo Chung, Matthew L Magnuson

  • 1National Exposure Research Laboratory, US Environmental Protection Agency, Cincinnati, OH, USA.

International Journal of Hygiene and Environmental Health
|August 5, 2005
PubMed

Insights

Penicillium chrysogenum produces chrysolysin, a protein that causes red blood cell lysis. Indoor air isolates are more likely to produce this hemolysin, which may promote inflammation.

Area of Science:

  • Microbiology
  • Immunology
  • Biochemistry

Background:

  • Penicillium chrysogenum is a common mold.
  • Some strains produce a protein called chrysolysin, a hemolysin.
  • Chrysolysin's role in host response is not fully understood.

Purpose of the Study:

  • To investigate the production and properties of chrysolysin.
  • To determine the effect of chrysolysin on macrophage inflammatory response.

Main Methods:

  • Culturing P. chrysogenum strains at different temperatures.
  • Analyzing chrysolysin's protein characteristics (size, isoelectric point).
  • Treating RAW 264.7 macrophage cell line with purified chrysolysin and measuring MIP-2 production.

Main Results:

  • Chrysolysin production is temperature-dependent (37°C vs. 23°C).
  • Indoor air P. chrysogenum isolates showed higher hemolysis rates (92%) compared to non-indoor air isolates (43%).
  • Chrysolysin treatment significantly increased macrophage inflammatory protein-2 (MIP-2) production in a dose-dependent manner.

Conclusions:

  • Chrysolysin is an aggregating protein produced by P. chrysogenum.
  • Indoor air isolates are more potent producers of chrysolysin.
  • Chrysolysin may contribute to host inflammatory responses during P. chrysogenum exposure.

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