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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...
Nephrons01:10

Nephrons

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 happens...
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...
Drug Elimination by Renal Route: Tubular Secretion01:15

Drug Elimination by Renal Route: Tubular Secretion

Once the process of glomerular filtration is completed, blood carrying unfiltered drug molecules traverses through efferent arterioles and makes its way into the peritubular capillaries in the proximal tubule. A variety of carriers play a pivotal role in actively secreting drugs from these peritubular capillaries into the tubular fluid. The organic anion transporter transfers acidic drugs, against an electrochemical gradient, from the peritubular capillaries into the renal tubule cells and...

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Related Experiment Video

Updated: May 19, 2026

Generation of Patient-Derived Podocytes from Skin Biopsies
08:52

Generation of Patient-Derived Podocytes from Skin Biopsies

Published on: May 26, 2023

Kidney podocytes as specific targets for cyclo(RGDfC)-modified nanoparticles.

Klaus Pollinger1, Robert Hennig, Miriam Breunig

  • 1Department of Pharmaceutical Technology, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|August 14, 2012
PubMed
Summary

Nanoparticles modified with cyclo(RGDfC) show specific binding to podocyte integrin receptors after renal filtration. This targeted approach holds promise for future diagnostics and therapies for kidney diseases.

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Area of Science:

  • Nanomedicine
  • Renal cell biology
  • Integrin receptor research

Background:

  • Podocytes are crucial cells forming the kidney's filtration barrier.
  • Targeting specific cell receptors is key for advanced diagnostics and therapies.
  • Nanoparticle delivery systems offer potential for precise cellular targeting.

Purpose of the Study:

  • To investigate the targeted binding of cyclo(RGDfC)-modified Qdots to podocytes.
  • To evaluate the specificity of nanoparticle binding to the αvβ3 integrin receptor.
  • To assess the potential of renal nanoparticle passage for targeting podocyte-associated diseases.

Main Methods:

  • Synthesis and modification of Qdots with cyclo(RGDfC) peptide.
  • Testing nanoparticle binding on isolated primary podocytes and U87-MG cells.
  • Conducting displacement experiments to determine IC50 values for αvβ3 integrin binding.
  • Utilizing confocal microscopy to visualize cellular uptake and localization.

Main Results:

  • Demonstrated highly cell- and receptor-specific binding of cyclo(RGDfC)-Qdots to podocytes.
  • Measured IC50 values of 60 nM for podocytes and 150 nM for U87-MG cells in displacement assays.
  • Observed cellular uptake of Qdots into vesicle-like structures via confocal microscopy.

Conclusions:

  • Renal nanoparticle passage enables targeting of podocytes via αvβ3 integrin receptors.
  • This targeted delivery system shows significant potential for future diagnostics and therapies of kidney diseases.
  • Ex vivo evidence supports the feasibility of using modified nanoparticles for podocyte-specific applications.