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Related Concept Videos

Glomerular Filtration01:15

Glomerular Filtration

2.3K
The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

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The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
3.4K
Glomerular Filtration: Net Filtration Pressure01:26

Glomerular Filtration: Net Filtration Pressure

3.8K
Glomerular filtration, a key process in the kidneys, is regulated by three main pressures: Glomerular blood hydrostatic pressure (GBHP), Capsular hydrostatic pressure (CHP), and Blood colloid osmotic pressure (BCOP).
GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal...
3.8K
Renal Corpuscle01:20

Renal Corpuscle

3.3K
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.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
3.3K
Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration01:29

Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration

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The kidneys are vital organs responsible for regulating blood filtration, waste excretion, and fluid balance, all of which are crucial for maintaining homeostasis. Renal physiology examines renal blood flow, glomerular filtration, and urine formation, ensuring the body’s internal environment remains stable.Renal Blood FlowThe kidneys receive about 20-25% of the cardiac output, typically around 1200 mL of blood per minute in an average adult. Blood flows into the kidneys through the renal...
84
Renal Drug Excretion: Glomerular Filtration01:02

Renal Drug Excretion: Glomerular Filtration

543
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
543

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Updated: Sep 16, 2025

Highly Sensitive Measurement of Glomerular Permeability in Mice with Fluorescein Isothiocyanate-polysucrose 70
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Microphysiological Glomerular Filtration Barriers: Current Insights, Innovations, and Future Applications.

Manon Miran1,2,3, Kieu Ngo2, David Buob1

  • 1Sorbonne Université, Inserm, Common and Rare Kidney Diseases: from Molecular Events to Precision Medicine, CoRaKiD, Paris, F-75020, France.

Advanced Biology
|July 7, 2025
PubMed
Summary
This summary is machine-generated.

Microphysiological glomerular filtration barriers (MPGFB) offer advanced in vitro models for chronic kidney disease (CKD) research. These organ-on-chip systems accurately mimic the kidney

Keywords:
glomerular filtration barriermicrofluidicsmicrophysiological systemsnephrologyorgans‐on‐a‐chip

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Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli
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Area of Science:

  • Nephrology and Biomedical Engineering
  • Organ-on-a-chip technology for kidney research

Background:

  • Chronic kidney disease (CKD) impacts over 850 million globally, often leading to kidney failure.
  • The glomerular filtration barrier (GFB) is crucial for kidney function but challenging to model accurately.
  • Traditional research models fail to replicate the GFB's complexity, hindering CKD studies.

Purpose of the Study:

  • To review the structure and function of the glomerular filtration barrier (GFB).
  • To explore the fabrication and application of microphysiological glomerular filtration barriers (MPGFB).
  • To highlight MPGFB's role in advancing kidney disease research and therapeutic development.

Main Methods:

  • Review of existing literature on GFB structure, function, and modeling.
  • Analysis of microphysiological systems (MPS) and organ-on-chip technologies for MPGFB.
  • Examination of MPGFB fabrication techniques, including materials, 3D design, and flow control.

Main Results:

  • MPGFB systems, using organ-on-chip technology, closely mimic in vivo GFB conditions.
  • These systems enable detailed permeability analysis for disease mechanism and drug toxicity studies.
  • Patient-specific studies are possible using human-induced pluripotent stem cells in MPGFB platforms.

Conclusions:

  • MPGFB represents a significant advancement over traditional models for studying kidney diseases.
  • MPGFB facilitates research into CKD mechanisms, genetic kidney disorders, and drug efficacy.
  • Further refinement of MPGFB technology is crucial for its role in kidney disease research and treatment.