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Allen D. Roses, MD; D. Allan Butterfield, PhD; Stanley H. Appel, MD; Donald B. Chestnut, PhD

Arch Neurol. 1975;32(8):535-538.

Abstract
Electron spin resonance spectroscopy was used to substantiate the presence of a membrane defect in myotonic erythrocytes. There was increased membrane fluidity and decreased polarity in myotonic membranes. Phenytoin (formerly diphenylhydantoin) "normalizes" fluidity differences in spectra derived from myotonic erythrocytes but has no significant effect on normal spectra. These experiments demonstrate the applicability of biophysical methods to human erythrocyte membranes and support the concept of a membrane defect in myotonic dystrophy that does not have a primary myopathic, neuropathic, or vascular cause.

Author Affiliations
From the Division of Neurology, Department of Medicine, Duke University Medical Center (Drs. Roses and Appel) and the P.M. Gross Chemistry Laboratory, Duke University, Durham, NC (Drs. Butterfield and Chesnut).

Footnotes
Accepted for publication Oct 15, 1974.

Reprint requests to Division of Neurology, Department of Medicine, Duke University Medical Center, Durham, NC 27710 (Dr. Roses).

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