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Phase II Study of the Pathophysiology and Treatment With Enalapril and Polystyrene Sulfonate for Pseudohypoaldosteronism, Type I

23:49 EDT 23rd April 2014 | BioPortfolio

Summary

OBJECTIVES: I. Establish the sodium and potassium intake that will maintain a normovolemic state in a patient with pseudohypoaldosteronism.

II. Determine the effect of extracellular fluid volume and serum potassium manipulations on exercise tolerance, cardiac function, and endurance.

III. Investigate pharmacologic methods of limiting excretion of sodium in urine and sweat.

Description

PROTOCOL OUTLINE: Sodium and potassium intake resulting in normalization of serum electrolytes and markers of extracellular volume are determined at baseline. A trial diet is then prescribed, with adjustments made to achieve a steady state with normal serum electrolytes. Exercise tolerance and muscle function are evaluated at steady state.

Sodium and potassium are sequentially manipulated with diet, enalapril, and polystyrene sulfonate. Exercise tolerance is evaluated during each diet period.

A treatment plan to maintain electrolyte balance is developed. The patient is followed monthly for 3 to 6 months, then every 3 months for up to 3 years.

Study Design

Primary Purpose: Treatment

Conditions

Pseudohypoaldosteronism

Intervention

enalapril, polystyrene sulfonate

Status

Completed

Source

Office of Rare Diseases (ORD)

Results (where available)

View Results

Links

Medical and Biotech [MESH] Definitions

A heterogeneous group of disorders characterized by renal electrolyte transport dysfunctions. Congenital forms are rare autosomal disorders characterized by neonatal hypertension, HYPERKALEMIA, increased RENIN activity and ALDOSTERONE concentration. The Type I features HYPERKALEMIA with sodium wasting; Type II, HYPERKALEMIA without sodium wasting. Pseudohypoaldosteronism can be the result of a defective renal electrolyte transport protein or acquired after KIDNEY TRANSPLANTATION.

One of the ANGIOTENSIN-CONVERTING ENZYME INHIBITORS that is used to treat hypertension.

A diazo-naphthalene sulfonate that is widely used as a stain.

A colorless, toxic liquid with a strong aromatic odor. It is used to make rubbers, polymers and copolymers, and polystyrene plastics.

A strongly basic anion exchange resin whose main constituent is polystyrene trimethylbenzylammonium Cl(-) anion.

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