Volume 44, Issue 6 pp. 867-872
Original Article
Full Access

Adult polyglucosan body disease in Ashkenazi Jewish patients carrying the Tyr329 Ser mutation in the glycogen-branching enzyme gene

Dr. Alexander Lossos MD

Corresponding Author

Dr. Alexander Lossos MD

Department of Neurology, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Department of Neurology, Hadassah University Hospital, POB 12000, Jerusalem 91120, IsraelSearch for more papers by this author
Zeev Meiner MD

Zeev Meiner MD

Department of Neurology, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Varda Barash PhD

Varda Barash PhD

Department of Biochemistry, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Dov Soffer MD

Dov Soffer MD

Department of Pathology, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Ilana Schlesinger MD

Ilana Schlesinger MD

Department of Neurology, Sapir Medical Center, Kfar Saba, Israel

Search for more papers by this author
Oded Abramsky MD, PhD

Oded Abramsky MD, PhD

Department of Neurology, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Zohar Argov MD

Zohar Argov MD

Department of Neurology, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Shoshi Shpitzen MSc

Shoshi Shpitzen MSc

Department of Medical Genetics/Center for Research, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
Vardiella Meiner MD

Vardiella Meiner MD

Department of Medical Genetics/Center for Research, Prevention and Treatment of Atherosclerosis, Hebrew University-Hadassah Medical School and Hadassah University Hospital, Jerusalem

Search for more papers by this author
First published: 08 October 2004
Citations: 106

Abstract

Adult polyglucosan body disease (APBD) is a late-onset, slowly progressive disorder of the nervous system caused by glycogen branching enzyme (GBE) deficiency in a subgroup of patients of Ashkenazi Jewish origin. Similar biochemical finding is shared by glycogen storage disease type IV (GSD IV) that, in contrast to APBD, is an early childhood disorder with primarily systemic manifestations. Recently, the GBE cDNA was cloned and several mutations were characterized in different clinical forms of GSD IV. To examine whether mutatins in the GBE gene account for APBD, we studied 7 patients from five Jewish families of Ashkenazi ancestry. The diagnosis was based on the typical clinical and pathological findings, and supported by reduced GBE activity. We found that the clinical and biochemical APBD phenotype in all five families cosegregated with the Tyr329Ser mutation, not detected in 140 controls. As this mutation was previously identified in a nonprogressive form of GSD IV and was shown in expression studies to result in a significant residual GBE activity, present findings explain the late onset and slowly progressive course of APBD in our patients. We conclude that APBD represents an allelic variant of GSD IV, but the reason for the difference in primary tissue involvement must be established.

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

click me