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Antifungal Agents01:15

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Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to...
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Live Imaging of Antifungal Activity by Human Primary Neutrophils and Monocytes in Response to A. fumigatus
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Adaptive immunity to fungi.

Akash Verma1, Marcel Wüthrich2, George Deepe1

  • 1Veterans Affairs Hospital, University of Cincinnati College of Medicine, Cincinnati, Ohio 45220 Division of Infectious Diseases, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267.

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Recent advances in medical care increase life-threatening fungal infections. Understanding mammalian immune defenses against fungi is crucial for developing new therapies to combat these infections.

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Area of Science:

  • Immunology
  • Mycology
  • Infectious Diseases

Background:

  • Life-threatening fungal infections are increasing due to intensive medical care that can weaken patient immunity.
  • There is a growing need to understand immune responses to fungi for therapeutic development.

Purpose of the Study:

  • To elucidate mammalian immune defense mechanisms against pathogenic fungi.
  • To focus on adaptive immunity and key coordinating elements in antifungal responses.

Main Methods:

  • Review of recent insights into mammalian immune defenses against fungi.
  • Emphasis on adaptive immunity, dendritic cells, fungal molecular patterns, and T/B cell differentiation.
  • Analysis of effector and regulatory mechanisms for fungal clearance and tissue protection.

Main Results:

  • Dendritic cell subsets are mobilized in various anatomical sites against fungi.
  • Fungal molecular patterns and their receptors signal responses and influence T and B cell differentiation.
  • Effector mechanisms eliminate fungi while regulatory mechanisms prevent tissue damage.

Conclusions:

  • Understanding these immune components provides a foundation for novel immune-based strategies.
  • New strategies can be developed for the prevention and enhanced clearance of systemic fungal diseases.