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Related Experiment Videos

Reversible hexadimethrine-induced alterations in glomerular structure and permeability.

C R Bridges1, H G Rennke, W M Deen

  • 1Laboratory of Kidney and Electrolyte Physiology, Brigham & Women's Hospital, Boston, MA.

Journal of the American Society of Nephrology : JASN
|March 11, 1991
PubMed
Summary

Hexadimethrine (HDM) infusion causes kidney damage, increasing protein excretion and reducing filtration. Heparin treatment rapidly reverses these effects, restoring kidney function and structure.

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Area of Science:

  • Nephrology
  • Renal Physiology
  • Pathology

Background:

  • Hexadimethrine (HDM) is a positively charged molecule that can interact with the negatively charged glomerular filtration barrier.
  • Understanding HDM's effects on kidney function is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the effects of HDM on glomerular filtration and selectivity in rats.
  • To evaluate the efficacy of heparin in mitigating HDM-induced kidney injury.

Main Methods:

  • Female Munich-Wistar rats received intravenous HDM until proteinuria onset.
  • Experimental groups included control, HDM only, and HDM with heparin treatment.
  • Glomerular filtration rate, renal plasma flow, and dextran clearances were measured.

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Main Results:

  • HDM infusion caused significant proteinuria, reduced GFR and RPF, and induced intraglomerular microthrombosis.
  • Heparin treatment in HDM-infused rats led to rapid recovery of GFR, RPF, and proteinuria.
  • Morphological alterations, including foot process obliteration, were reversed by heparin.

Conclusions:

  • HDM induces transient defects in glomerular size and charge selectivity, leading to kidney injury.
  • Heparin effectively reverses HDM-induced nephrotoxicity and restores normal kidney function.
  • These findings highlight the role of charge interactions in glomerular filtration and injury.