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Related Concept Videos

Renal Corpuscle01:20

Renal Corpuscle

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 capillaries...
Glomerular Filtration01:15

Glomerular Filtration

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.
Diabetic Nephropathy01:28

Diabetic Nephropathy

Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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 fluid...
Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

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...
Type IV Collagen of Basal Lamina01:05

Type IV Collagen of Basal Lamina

Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen  forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can exist in...

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Related Experiment Video

Updated: Jul 7, 2026

Assessment of Kidney Function in Mouse Models of Glomerular Disease
09:16

Assessment of Kidney Function in Mouse Models of Glomerular Disease

Published on: June 30, 2018

[Thin glomerular basement membrane disease].

G M Frascà1, E Balestra, E Fanciulli

  • 1Nefrologia, Ospedali Riuniti, Ancona, Italy. gm.frasca@ao-umbertoprimo.marche.it

Giornale Italiano Di Nefrologia : Organo Ufficiale Della Societa Italiana Di Nefrologia
|February 12, 2008
PubMed
Summary
This summary is machine-generated.

Thin glomerular basement membrane disease (TBMD) is a hereditary kidney condition affecting 1-2% of biopsies. Genetic mutations in COL4A3/COL4A4 are found in over 30% of patients, impacting diagnosis and potential progression.

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Area of Science:

  • Nephrology
  • Genetics
  • Pathology

Context:

  • Thin glomerular basement membrane disease (TBMD) is a hereditary nephropathy.
  • Characterized by glomerular basement membrane thinning and isolated hematuria.
  • Often presents with familial aggregation and autosomal dominant transmission.

Purpose:

  • To elucidate the genetic basis and diagnostic challenges of TBMD.
  • To differentiate TBMD from Alport syndrome.
  • To understand the potential for disease progression.

Summary:

  • TBMD involves a thinned glomerular basement membrane, often linked to COL4A3/COL4A4 gene mutations in over 30% of cases.
  • Differential diagnosis with Alport syndrome requires genetic and immunohistochemical studies.
  • While rare, progression to chronic renal failure can occur, necessitating monitoring.

Impact:

  • Highlights the role of COL4A3/COL4A4 mutations in TBMD.
  • Emphasizes the importance of accurate diagnosis to manage potential progression.
  • Informs patients about transmission risks, including recessive Alport syndrome.