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Related Concept Videos

Overview of Fungi01:29

Overview of Fungi

Fungi are a diverse group of eukaryotes more closely related to animals than other eukaryotes. Fungal cell walls comprise chitin, a polysaccharide that provides structural strength, and glucans, which contribute to flexibility and integrity. Other polysaccharides, such as mannans and galactosans, may supplement or replace chitin in some fungi. These adaptations, along with their preference for acidic environments and tolerance for high osmotic pressure, enable fungi to thrive in various...
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Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
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Fungal Phylum Basidiomycota

Basidiomycota is a diverse phylum of fungi that includes ecologically significant decomposers such as white rot fungi, symbionts like mycorrhizal fungi, plant pathogens such as rusts and smuts, and edible species like Agaricus bisporus (the common button mushroom). These fungi play crucial roles in nutrient cycling, symbiotic relationships, and even human health. Their defining feature is the basidium, a microscopic club-shaped structure responsible for producing basidiospores.Fruiting Bodies...
Fungal Phylum Microsporidia01:28

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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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Phylum Ascomycota, a major division within the subkingdom Dikarya, comprises a diverse range of fungal species, including both unicellular yeasts and filamentous molds such as Aspergillus and Penicillium. These fungi thrive in a variety of habitats, from aquatic ecosystems to terrestrial environments, playing crucial ecological and economic roles.Morphology and ReproductionThe defining characteristic of Ascomycetes, commonly referred to as sac fungi, is the ascus—a sac-like structure that...
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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 cholesterol contributes to...

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Application of Membrane and Cell Wall Selective Fluorescent Dyes for Live-Cell Imaging of Filamentous Fungi
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Application of Membrane and Cell Wall Selective Fluorescent Dyes for Live-Cell Imaging of Filamentous Fungi

Published on: November 28, 2019

iNKTs foil fungi.

Martin Prlic1, Tobias M Hohl

  • 1Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. mprlic@fhcrc.org

Cell Host & Microbe
|November 22, 2011
PubMed
Summary
This summary is machine-generated.

Fungal beta-(1,3)-glucan activates invariant natural killer T (iNKT) cells indirectly via cytokines. This cytokine-driven pathway is crucial for effective immune defense against Aspergillus fumigatus.

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Area of Science:

  • Immunology
  • Mycology
  • Microbiology

Background:

  • Fungal cell wall polysaccharides, such as beta-(1,3)-glucan, are known potent immune response inducers.
  • Invariant natural killer T (iNKT) cells are crucial immune cells involved in host defense.
  • Aspergillus fumigatus is an opportunistic fungal pathogen that poses a significant threat to immunocompromised individuals.

Discussion:

  • This study elucidates the mechanism by which fungal beta-(1,3)-glucan triggers iNKT cell effector functions.
  • The findings highlight an indirect, cytokine-mediated activation pathway for iNKT cells.
  • This pathway is essential for mounting an effective immune response against Aspergillus fumigatus.

Key Insights:

  • Innate recognition of fungal beta-(1,3)-glucan leads to indirect iNKT cell activation.
  • Cytokine signaling plays a pivotal role in mediating the iNKT cell response to fungal components.
  • This mechanism is vital for optimal protection against Aspergillus fumigatus infections.

Outlook:

  • Further research can explore therapeutic strategies targeting this iNKT cell activation pathway for fungal infections.
  • Understanding this innate immune recognition can lead to novel antifungal therapies.
  • Investigating other fungal polysaccharides and their interaction with iNKT cells may reveal broader immune mechanisms.