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A mouse model for Liddle's syndrome.

S Pradervand1, Q Wang, M Burnier

  • 1Institut de Pharmacologie et de Toxicologie de l'Université, Lausanne, Switzerland.

Journal of the American Society of Nephrology : JASN
|December 10, 1999
PubMed
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Liddle's syndrome, a genetic hypertension, was studied in a new mouse model. High salt intake in these mice caused high blood pressure and organ damage, confirming a link between diet, kidney genes, and hypertension.

Area of Science:

  • Nephrology
  • Genetics
  • Cardiovascular Medicine

Background:

  • Liddle's syndrome is an autosomal dominant, salt-sensitive hypertension.
  • It results from abnormal renal tubule sodium transport.
  • Understanding its pathophysiology is crucial for hypertension management.

Purpose of the Study:

  • To develop and characterize a mouse model for Liddle's syndrome.
  • To investigate the pathophysiology of salt sensitivity in this model.
  • To establish a causal link between dietary salt, kidney gene expression, and hypertension.

Main Methods:

  • Generated a mouse model for Liddle's syndrome using Cre/loxP recombination.
  • Assessed blood pressure, electrolyte balance, and organ hypertrophy under normal and high salt diets.

Related Experiment Videos

  • Evaluated sodium reabsorption in the distal colon and plasma aldosterone levels.

    • Main Results:

    • Liddle mice (heterozygous and homozygous) showed normal development on a normal salt diet.
    • High salt intake induced hypertension, metabolic alkalosis, and hypokalemia in Liddle mice.
    • Cardiac and renal hypertrophy were observed in Liddle mice on a high salt diet, mimicking human Liddle's syndrome.

    Conclusions:

    • The developed mouse model effectively reproduces human salt-sensitive hypertension.
    • A direct causal relationship between dietary salt, a specific kidney gene, and hypertension was established.
    • This model provides valuable insights into Liddle's syndrome pathophysiology and potential therapeutic targets.