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Related Concept Videos

Complement System01:27

Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...
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...
Fungal Group Zygomycota01:29

Fungal Group Zygomycota

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...
Antifungal Agents01:15

Antifungal Agents

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...
Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Fungal Phylum Basidiomycota01:26

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...

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Isolation, Behavioral Identification, and Pathogenicity Assessment of Entomopathogenic Fungi from a Forest Wood Borer
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Complement and fungal pathogens: an update.

Cornelia Speth1, Günter Rambach, Reinhard Würzner

  • 1Department of Hygiene, Microbiology and Social Medicine, Division of Hygiene and Medical Microbiology, Innsbruck Medical University, Innsbruck, Austria. cornelia.speth@i-med.ac.at

Mycoses
|August 19, 2008
PubMed
Summary
This summary is machine-generated.

The complement system is crucial for fighting fungal infections in immunocompromised patients. Understanding its role can lead to new therapies to boost immune defenses against dangerous fungi.

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Area of Science:

  • Immunology
  • Mycology
  • Infectious Diseases

Background:

  • Fungal infections pose a significant threat to immunocompromised individuals, often leading to high mortality despite available antifungal drugs.
  • There is an urgent need for immunotherapies to enhance the weakened immune systems of these patients.
  • Investigating the interaction between fungal pathogens and host immunity is key to developing novel therapeutic strategies.

Purpose of the Study:

  • To review the current understanding of the complement system's role in the pathogenesis of fungal infections.
  • To explore how fungi activate complement, how complement combats fungi, and the evasion mechanisms employed by fungi.
  • To discuss the potential of the complement system as a therapeutic target for fungal infections.

Main Methods:

  • Literature review of studies on complement activation by fungi.
  • Analysis of complement's antimicrobial functions against fungal pathogens.
  • Examination of fungal immune evasion strategies targeting the complement system.

Main Results:

  • The complement system is activated by fungal pathogens, contributing to both innate and adaptive immunity.
  • Fungi employ sophisticated strategies to evade complement-mediated destruction.
  • Complement plays a dual role, aiding in defense but also potentially contributing to fungal-induced allergies.

Conclusions:

  • The complement system is a critical component in host defense against fungal infections.
  • Targeting the complement system offers a promising avenue for developing supportive immunotherapies.
  • The complex 'Yin-Yang' nature of complement in fungal infections, including its role in allergic responses, requires further investigation.