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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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T Cell Activation and Clonal Selection01:22

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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
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Cell-mediated Immune Responses01:40

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B Cell Activation and Differentiation01:24

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Antigens Involved in Adaptive Immunity01:26

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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
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Humoral Immune Responses01:36

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Related Experiment Video

Updated: Jun 24, 2025

Unraveling Key Players of Humoral Immunity: Advanced and Optimized Lymphocyte Isolation Protocol from Murine Peyer's Patches
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Local complement activation and modulation in mucosal immunity.

Devesha H Kulkarni1, Marick Starick2, Rafael Aponte Alburquerque2

  • 1Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO, USA.

Mucosal Immunology
|June 5, 2024
PubMed
Summary

The complement system, a key part of innate immunity, is crucial for fighting pathogens and clearing debris. Understanding its local tissue functions offers new therapeutic strategies for immune regulation.

Keywords:
ATG7C3 F/SC3 fast/slowCCAATCXCLDSSFXRHSV-1ICAMIRFJAK1/2Janus kinase ½MAPKMMPNLRP3PPARPTENRELA - v-relROSSTAT1VEGF-Aautophagy related 7chemokine (C-X-C motif) ligandcytosine-cytosine-adenosine-adenosine-thymidinedextran sodium sulfatefarnesoid X receptorherpes simplex virus-1intercellular adhesion moleculeinterferon regulatory factormatrix metalloproteinasemitogen-activated protein kinasenucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3peroxisome proliferator-activated receptorphosphatase and tensin homologreactive oxygen speciesreticuloendotheliosis viral oncogene homolog A (avian)signal transducer and activation of transcription 1vascular endothelial growth factor-A

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Area of Science:

  • Immunology
  • Innate Immunity
  • Complement System Biology

Background:

  • The complement system is a critical component of innate immunity, essential for host defense against pathogens and removal of cellular debris.
  • Dysregulation of the complement cascade leads to severe health issues, including recurrent infections and accelerated organ failure (e.g., colitis, transplant rejection).
  • With over 60 proteins, the complement system is a significant focus for immunotherapeutic development, with many agents in clinical trials.

Purpose of the Study:

  • To review recent advances in understanding the complement system's local tissue functions.
  • To discuss strategies for modulating complement activation and regulation at mucosal surfaces.
  • To provide perspective on targeting the spatiotemporal nature of complement in therapeutics.

Main Methods:

  • Literature review of recent discoveries in complement system research.
  • Analysis of complement activation and regulation mechanisms in tissue microenvironments.
  • Synthesis of findings to inform therapeutic approaches for mucosal immunity.

Main Results:

  • Recent advances highlight the localized, tissue-specific roles of the complement system, distinct from its systemic functions.
  • Understanding these local mechanisms is key to developing targeted immunomodulatory therapies.
  • The spatiotemporal control of complement activation at mucosal surfaces presents a promising therapeutic frontier.

Conclusions:

  • Targeting the complement system offers significant therapeutic potential, particularly for inflammatory and autoimmune conditions.
  • Modulating complement activity locally at mucosal surfaces is a viable strategy for treating diseases like colitis and preventing transplant rejection.
  • Further research into the localized functions of the complement system will drive the development of novel immunotherapeutics.