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Adenosine Triphosphatase and Adenyl Cyclase

Shiro Mawatari, MD; Michael Schonberg, PhD; Marcelo Olarte, MD

Arch Neurol. 1976;33(7):489-493.

Abstract
• Adenosine triphosphatase (ATPase) activity in erythrocyte membranes from patients with Duchenne dystrophy was inhibited by ouabain less than in normal individuals in assay systems containing high or low contents of salt. Epinephrine and cyclic adenosine monophosphate increased total ATPase activity in all samples, and epinephrine restored ouabain sensitivity to the Duchenne membranes. Basal adenyl cyclase activity in Duchenne erythrocyte membranes was about twice that of controls. Epinephrine stimulated adenyl cyclase activity of normal membranes two to three times, but did not stimulate the enzyme in Duchenne membranes. These differences may reflect a genetic abnormality of the membrane.

Author Affiliations
From the H. Houston Merritt Clinical Research Center for Muscular Dystrophy and Related Diseases and the Department of Neurology, College of Physicians and Surgeons, Columbia University, New York.

Footnotes
Accepted for publication Sept 11, 1975.

Reprint requests to Neurological Institute, 710 W 168th St, New York, NY 10032 (Dr Schonberg).

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