Pathophysiology and treatment of Wilson's disease

Abstract

The pathophysiology, symptomatology, and treatment of Wilson's disease are reviewed, and new approaches to drug management are discussed. Wilson's disease is a rare, autosomal recessive disorder that occurs between the ages of 6 and 60 years. Disturbances in copper metabolism may result in the accumulation of excess copper in the liver, the basal ganglia of the brain (lenticular degeneration), the kidneys, the cornea (Kayser-Fleischer rings), and other tissues. The diagnosis of Wilson's disease is frequently overlooked; nonspecific symptoms and multisystem involvement may mimic other disease states, such as neurologic and psychiatric disorders, and hemolytic anemia. Screening tests for Wilson's disease include 24-hour urinary copper levels, serum ceruloplasmin and copper assays, radioactive uptake of 64Cu, and liver biopsy. Current methods of therapy include the use of a chelating agent--penicillamine or trientine--for initial rapid decoppering. Penicillamine therapy has been associated with many adverse reactions, including worsening of the neurologic symptoms of the patient. Zinc is a useful agent for maintenance therapy. Investigational studies exploring the use of ammonium tetrathiomolybdate for initial rapid decoppering have shown promising results. Unless it is recognized and treated, Wilson's disease can cause severe symptoms and, ultimately, death. Initial rapid decoppering with chelating agents, such as penicillamine and trientine, followed by lifelong maintenance therapy with zinc is the current method of treatment.