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Related Concept Videos

Complement System01:27

Complement System

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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...
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A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
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The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
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Related Experiment Video

Updated: Feb 10, 2026

Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes
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Staphylococcus aureus: the multi headed hydra resists and controls human complement response in multiple ways.

Peter F Zipfel1, Christine Skerka2

  • 1Department of Infection Biology, Leibniz Institute for Natural Products Research and Infection Biology, Hans-Knöll Institute, Beutenbergstr. 11a, 07745 Jena, Germany; Friedrich Schiller University Jena, 07745 Jena, Germany.

International Journal of Medical Microbiology : IJMM
|January 28, 2014
PubMed
Summary
This summary is machine-generated.

New antibacterial compounds are needed to combat resistant Staphylococcus aureus (MRSA). Understanding how this pathogen evades the immune system, particularly complement control, is key to developing novel therapies.

Keywords:
ComplementImmune escape pathogenic bacteria

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Area of Science:

  • Microbiology
  • Immunology
  • Pathogenesis

Background:

  • Staphylococcus aureus is a Gram-positive pathogen causing diverse human infections.
  • Increasing antibiotic resistance, notably Methicillin-resistant S. aureus (MRSA), necessitates new antimicrobial strategies.
  • Understanding host-pathogen interactions is crucial for developing effective treatments.

Purpose of the Study:

  • To identify staphylococcal proteins involved in innate immune evasion.
  • To analyze the mechanisms by which these proteins interfere with complement control.
  • To discover new targets for immune-based therapeutic interventions against S. aureus.

Main Methods:

  • Proteomic analysis of S. aureus.
  • In vitro assays to assess complement system interaction.
  • Functional characterization of identified staphylococcal proteins.

Main Results:

  • Identification of specific staphylococcal proteins contributing to immune evasion.
  • Elucidation of their role in inhibiting complement-mediated bacterial clearance.
  • Characterization of their molecular mechanisms of action.

Conclusions:

  • Targeting staphylococcal immune evasion proteins offers a promising strategy for novel antibacterial therapies.
  • Understanding complement evasion mechanisms is vital for combating S. aureus infections.
  • This research provides a foundation for developing new treatments against resistant strains.