Volume 20, Issue 10 pp. 1219-1224
Main Article

Biochemical and genetic studies in a family with mitochondrial myopathy

Terry D. Heiman-Patterson MD

Terry D. Heiman-Patterson MD

Department of Neurology, Thomas Jefferson University, 111 S. 11th St., Philadelphia, Pennsylvania 19107, USA

Search for more papers by this author
Zohar Argov MD

Zohar Argov MD

Department of Neurology, Hadassah University Hospital, Jerusalem, Israel

Search for more papers by this author
Jeffrey M. Chavin MD

Jeffrey M. Chavin MD

Department of Neurology, Thomas Jefferson University, 111 S. 11th St., Philadelphia, Pennsylvania 19107, USA

Search for more papers by this author
Bernadette Kalman MD, PhD

Bernadette Kalman MD, PhD

Department of Neurology, Thomas Jefferson University, 111 S. 11th St., Philadelphia, Pennsylvania 19107, USA

Search for more papers by this author
Hansjuerg Alder PhD

Hansjuerg Alder PhD

Department of Microbiology, Kimmel Cancer Center, Philadelphia, Pennsylvania, USA

Search for more papers by this author
Salvatore DiMauro MD

Salvatore DiMauro MD

Department of Neurology, Columbia Presbyterian Medical Center, New York, New York, USA

Search for more papers by this author
William Bank MD

William Bank MD

Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania, USA

Search for more papers by this author
Albert J. Tahmoush MD

Corresponding Author

Albert J. Tahmoush MD

Department of Neurology, Thomas Jefferson University, 111 S. 11th St., Philadelphia, Pennsylvania 19107, USA

Department of Neurology, Thomas Jefferson University, 111 S. 11th St., Philadelphia, Pennsylvania 19107, USASearch for more papers by this author

Abstract

We present a family with severe exercise intolerance, progressive proximal weakness, and lactic acidemia. Fifteen of 24 family members in five generations were affected. Since the affected males do not have offspring at this time, the family pedigree is consistent with either maternal or autosomal dominant inheritance. Muscle histochemistry showed ragged-red fibers and electron microscopy showed globular mitochondrial inclusions. Biochemical analysis showed reduced muscle activities of mitochondrial NADH-cytochrome c reductase (1 of 2 patients), succinate-cytochrome c reductase (2 patients), and cytochrome c oxidase (2 patients). For 1 patient, sequence analysis of 44% of the muscle mitochondrial DNA including all 22 transfer RNA regions showed no point mutation with pathogenic significance. Southern blot analysis showed no deletion. Six affected members of the family were treated with methylprednisolone (0.25 mg/kg) for 3 months. Muscle strength, serum lactate, and energy metabolism at rest (measured by 31P magnetic resonance spectroscopy) significantly improved with treatment. © 1997 John Wiley & Sons, Inc. Muscle Nerve 20: 1219–1224, 1997

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

click me