Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A decrease in renal medullary tonicity stimulates anion transport in Henle's loop of rat kidneys

G Capasso1, C Saviano, F Ciani

  • 1Department of Nephrology, Second University of Naples, Italy.

The American Journal of Physiology
|May 12, 1998
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Potentially wildfire-induced mercury release in the Mediterranean basin: Evidence from a former mining area in Italy.

Journal of hazardous materials·2025
Same author

Antioxidant supplementation to medium for in vitro embryo production in Felis catus.

Polish journal of veterinary sciences·2019
Same author

Reactive oxygen metabolites in alpha-herpesvirus-seropositive Mediterranean buffaloes (Bubalus bubalis): a preliminary study.

Polish journal of veterinary sciences·2018
Same author

Influences of dietary supplementation with Lepidium meyenii (Maca) on stallion sperm production and on preservation of sperm quality during storage at 5 °C.

Andrology·2018
Same author

Genetic origin, admixture and population history of aurochs (Bos primigenius) and primitive European cattle.

Heredity·2017
Same author

Genetic origin, admixture and population history of aurochs (Bos primigenius) and primitive European cattle.

Heredity·2016

Reduced renal medulla osmolality enhances bicarbonate reabsorption in the loop of Henle (LOH). This finding suggests medullary tonicity influences anion transport in the kidney.

Area of Science:

  • Nephrology
  • Renal Physiology
  • Molecular Biology

Background:

  • The loop of Henle (LOH) plays a critical role in renal concentrating mechanisms and solute transport.
  • Medullary osmolality is a key factor in regulating kidney function, but its specific impact on LOH bicarbonate transport is not fully understood.

Purpose of the Study:

  • To investigate the effect of reduced renal medulla osmolality on net bicarbonate reabsorption in the loop of Henle.
  • To explore the influence of decreased medullary tonicity on chloride reabsorption in the LOH.

Main Methods:

  • Experiments were conducted on Sprague-Dawley rats using clearance and microperfusion techniques.
  • Reduced renal medulla osmolality was induced via intravenous infusion of mannitol or hypotonic solution.
  • Glomerular filtration rate (GFR), renal plasma flow, urine pH, and fractional bicarbonate excretion were measured.

Related Experiment Videos

Main Results:

  • Both mannitol and hypotonic saline infusion led to increased absolute and fractional loop of Henle bicarbonate transport.
  • Mannitol infusion increased GFR, renal plasma flow, urine pH, and fractional bicarbonate excretion.
  • Hypotonic saline infusion decreased GFR but also increased fractional bicarbonate excretion and stimulated chloride reabsorption.

Conclusions:

  • Decreased medullary tonicity stimulates both bicarbonate and chloride reabsorption in the loop of Henle.
  • The findings suggest that reduced medullary osmolality is a significant factor mediating enhanced transepithelial anion transport in the LOH.
  • This highlights a novel regulatory mechanism for anion transport within the renal medulla.