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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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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.
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Renal Corpuscle01:20

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
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Hypersensitivity Reactions: Immune-Complex Reactions01:19

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Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum...
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Nephrotic Syndrome I : Introduction01:24

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Updated: Mar 30, 2026

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
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The Complement System in Lupus Nephritis.

Daniel J Birmingham1, Lee A Hebert1

  • 1Department of Internal Medicine (Nephrology), The Ohio State University, Columbus, OH.

Seminars in Nephrology
|November 18, 2015
PubMed
Summary
This summary is machine-generated.

The complement system, crucial for immunity and waste disposal, paradoxically contributes to both protection and damage in lupus nephritis. Understanding its complex roles is key to managing this autoimmune kidney disease.

Keywords:
Complementlupus nephritis

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Area of Science:

  • Immunology
  • Nephrology
  • Autoimmune Diseases

Background:

  • The complement system is a vital part of innate immunity, defending against pathogens.
  • Beyond defense, complement influences immune responses, clears waste, and can cause tissue damage.
  • Its multifaceted roles are implicated in the complex pathogenesis of systemic lupus erythematosus and lupus nephritis.

Purpose of the Study:

  • To provide an overview of the human complement system and its functions.
  • To discuss the intricate and contradictory roles of complement in lupus nephritis pathogenesis.

Main Methods:

  • Literature review of complement system functions.
  • Analysis of complement's involvement in systemic lupus erythematosus and lupus nephritis.

Main Results:

  • Complement acts as a first-line defense but also modulates immune responses and waste clearance.
  • Complement contributes to both protective and damaging inflammatory pathways in lupus nephritis.
  • The system exhibits complex, dual effects in the pathogenesis of lupus nephritis.

Conclusions:

  • The complement system plays a significant, albeit complex and dual, role in lupus nephritis.
  • Further understanding of complement's intricate functions is essential for therapeutic strategies in lupus nephritis.