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Pathogen-specific antibodies: codependent no longer.

Edward N Janoff1, Daniel N Frank

  • 1Mucosal and Vaccine Research Program Colorado, University of Colorado Denver, RC-2, Box B-168, 12700 E. 19th Ave., Aurora, CO 80045, USA. Edward.Janoff@ucdenver.edu

The Journal of Clinical Investigation
|March 26, 2010
PubMed
Summary
This summary is machine-generated.

Some antibodies alone can inhibit fungal pathogens like Cryptococcus neoformans. Monoclonal antibodies targeting the fungal capsule alter gene expression and metabolism, suggesting new therapeutic strategies.

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Area of Science:

  • Immunology
  • Mycology
  • Molecular Biology

Background:

  • Antibody-mediated immunity typically involves complex immune cell interactions.
  • Emerging evidence suggests antibodies can exert direct antimicrobial effects independently of other immune components.
  • The direct impact of antibodies on pathogen metabolism remains largely unexplored.

Purpose of the Study:

  • To investigate the molecular mechanisms by which antibodies alone can influence pathogen growth and metabolism.
  • To determine the effects of monoclonal antibodies targeting the Cryptococcus neoformans capsule on fungal physiology.

Main Methods:

  • Utilized monoclonal antibodies (mAbs) specific for the polysaccharide capsule of Cryptococcus neoformans.
  • Analyzed changes in fungal gene expression, lipid biosynthesis, and protein phosphorylation.
  • Assessed alterations in cellular metabolism and susceptibility to antifungal drug amphotericin B.

Main Results:

  • Monoclonal antibodies against the Cryptococcus neoformans capsule induced significant changes in fungal gene expression.
  • Antibody binding altered fungal lipid biosynthesis, cellular metabolism, and protein phosphorylation patterns.
  • The study observed increased susceptibility to amphotericin B in antibody-treated fungi.

Conclusions:

  • Pathogen-specific antibodies can trigger broad metabolic and gene expression responses in fungi.
  • These antibody-induced pathogen responses may represent a novel therapeutic avenue.
  • Direct antibody effects on pathogen metabolism offer potential for new antifungal strategies.