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Related Experiment Videos

Effects of acyclovir on renal function.

S B Campos1, A C Seguro, K R Cesar

  • 1Laboratório de Pesquisa Básica, Nefrologia Faculdade de Medicina, Universidade de São Paulo, Brasil.

Nephron
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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High doses of acyclovir cause kidney problems in rats, leading to increased waste products and impaired water regulation. Acyclovir also causes resistance to vasopressin in the inner medullary collecting duct.

Area of Science:

  • Nephrology
  • Pharmacology
  • Toxicology

Background:

  • Acyclovir is an antiviral medication.
  • High doses of acyclovir can have adverse effects.
  • Renal function is crucial for drug metabolism and excretion.

Purpose of the Study:

  • To investigate the renal effects of high-dose acyclovir in a rat model.
  • To determine the specific sites of renal dysfunction induced by acyclovir.
  • To assess the impact of acyclovir on water and electrolyte balance.

Main Methods:

  • Rats were administered acyclovir (100 mg/kg/day i.p. for 7 days).
  • Renal function was assessed via urine output, blood urea nitrogen, and fractional electrolyte excretion.
  • In vitro studies measured water permeability in isolated inner medullary collecting ducts (IMCDs) with and without vasopressin stimulation.

Related Experiment Videos

Main Results:

  • Acyclovir-treated rats exhibited polyuria, elevated blood urea nitrogen, and increased sodium and potassium excretion.
  • Acyclovir impaired the kidney's ability to concentrate urine, indicated by altered free-water clearance and osmolar clearance ratios.
  • In vitro, acyclovir-treated IMCDs showed reduced water permeability and resistance to vasopressin, unlike control tissues.

Conclusions:

  • High-dose acyclovir induces azotemia and disrupts proximal tubule and thick ascending limb function.
  • Acyclovir causes vasopressin resistance in the inner medullary collecting duct, impairing water reabsorption.
  • These findings highlight potential nephrotoxicity associated with high acyclovir dosages.