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Related Concept Videos

Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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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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Glomerular Filtration01:15

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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.
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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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Confocal Fluorescence Microscopy01:16

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Nephrons01:10

Nephrons

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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Glomerular Filtration Rate and its Regulation01:28

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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.
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Related Experiment Video

Updated: Mar 7, 2026

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
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Focal Segmental Glomerulosclerosis.

Avi Z Rosenberg1,2, Jeffrey B Kopp1,2

  • 1Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, Maryland; and.

Clinical Journal of the American Society of Nephrology : CJASN
|March 1, 2017
PubMed
Summary
This summary is machine-generated.

Focal segmental glomerulosclerosis (FSGS) is a complex kidney disease with multiple causes, including genetic factors and APOL1 risk alleles. Accurate diagnosis through clinical, laboratory, and biopsy findings is crucial for guiding treatment and prognosis.

Keywords:
AllelesBiopsyBody SizeElectronFluorescent Antibody TechniqueFocal SegmentalGenetic TestingGlomerulosclerosisHumansKidney DiseasesKidney GlomerulusMicroscopyMutationPenetrancePodocytesSegmental glomerulosclerosisWorkloadhypertrophyimmunosuppressionkidneykidney transplantationnephrotic syndrome

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Area of Science:

  • Nephrology
  • Pathology
  • Genetics

Background:

  • Focal segmental glomerulosclerosis (FSGS) is a major cause of kidney failure globally.
  • FSGS has diverse etiologies, including primary, adaptive, genetic, viral, medication-induced, and APOL1 risk allele-associated forms.
  • Understanding the specific cause of FSGS is vital for effective management.

Purpose of the Study:

  • To review the current understanding and classification of FSGS.
  • To highlight the diagnostic approaches, including kidney biopsy and genetic testing.
  • To discuss the implications of etiology on therapy and prognosis.

Main Methods:

  • Review of clinical history, laboratory testing, and kidney biopsy findings (light microscopy, immunofluorescence, electron microscopy).
  • Integration of diagnostic data to classify FSGS.
  • Consideration of genetic testing in specific clinical contexts.

Main Results:

  • FSGS classification has expanded to include six categories.
  • Kidney biopsy provides crucial diagnostic clues for differentiating FSGS subtypes and other glomerular diseases.
  • Genetic testing aids in identifying specific FSGS etiologies in certain patients.

Conclusions:

  • Accurate etiological classification of FSGS is essential for personalized treatment strategies and prognostic assessment.
  • Further research is needed to identify the primary FSGS factor and develop improved therapies.
  • The role of routine genetic testing in FSGS management requires further investigation.