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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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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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Introduction to Urinary System01:13

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The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
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Renal Drug Excretion: Overview01:15

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As primary excretory organs, the kidneys maintain homeostasis by removing waste substances from the bloodstream. They comprise over a million units called nephrons, which serve as the kidney's functional units.
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Acute Kidney Injury II: Pathophysiology01:29

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Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
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Anatomy of the Genitourinary System I: Kidneys and Ureters01:11

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The upper urinary system comprises two kidneys and two ureters, which are crucial in filtering blood and forming urine.KidneysLocation and Structure:The kidneys are two bean-shaped organs positioned behind the peritoneum on either side of the spine.Kidneys are between the 12th thoracic (T12) and the 3rd lumbar (L3) vertebrae.The position of the liver causes the right kidney to sit slightly lower than the left.Protective Layers:Each kidney is enveloped in a tough, fibrous membrane called the...
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Updated: Dec 18, 2025

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
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Complement and the Kidney: An Overview.

Joshua M Thurman1

  • 1Department of Medicine, University of Colorado School of Medicine, Aurora, CO.

Advances in Chronic Kidney Disease
|June 20, 2020
PubMed
Summary
This summary is machine-generated.

The complement system, initially known for antibody responses, is now understood to drive kidney diseases like atypical hemolytic uremic syndrome. Understanding complement biology is crucial for developing new therapies targeting this immune pathway.

Keywords:
Antibody-mediated allograft rejectionComplementDiagnosticsGlomerulonephritisInflammationTherapeutics

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Area of Science:

  • Immunology
  • Nephrology

Background:

  • The complement cascade was initially recognized for its role in antibody-mediated cytotoxicity.
  • Complement activation in glomeruli was observed in immune complex glomerulonephritis.
  • Recent research reveals broader roles in immune regulation, homeostasis, and metabolism.

Purpose of the Study:

  • To highlight the expanding understanding of the complement system's functions beyond antibody-mediated cytotoxicity.
  • To emphasize the critical role of complement in the pathogenesis of various kidney diseases, including non-immune complex mediated ones.
  • To underscore the importance of understanding complement biology for developing targeted therapies.

Main Methods:

  • Review of historical and recent research on complement system biology and its role in kidney diseases.
  • Analysis of complement's involvement in immune complex glomerulonephritis, atypical hemolytic uremic syndrome, and C3 glomerulopathy.
  • Discussion of complement activation fragments and mechanisms of injury.

Main Results:

  • The complement system plays a significant role in immune regulation, homeostasis, and metabolism.
  • Uncontrolled complement activation is the primary driver in diseases like atypical hemolytic uremic syndrome and C3 glomerulopathy.
  • Complement activation generates pro-inflammatory fragments that can cause tissue injury if not controlled.

Conclusions:

  • The complement system is implicated in a wider range of kidney diseases than previously thought.
  • Understanding the diverse mechanisms of complement activation and injury is vital for therapeutic development.
  • New drugs targeting the complement cascade are in development, necessitating a comprehensive grasp of its biology.