Unit

UNIT 17.13 Diagnosing Lysosomal Storage Disorders: Fabry Disease

  1. Olaf A. Bodamer,
  2. Britt Johnson,
  3. Angela Dajnoki

Published Online: 1 APR 2013

DOI: 10.1002/0471142905.hg1713s77

Current Protocols in Human Genetics

Current Protocols in Human Genetics

How to Cite

Bodamer, O. A., Johnson, B. and Dajnoki, A. 2013. Diagnosing Lysosomal Storage Disorders: Fabry Disease. Current Protocols in Human Genetics. 77:17.13:17.13.1–17.13.7.

Author Information

  1. Division of Clinical and Translational Genetics, Dr. John T. MacDonald Foundation, Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida

Publication History

  1. Published Online: 1 APR 2013

Abstract

Fabry disease (FD) is an X-linked lysosomal storage disorder due to deficiency of alpha galactosidase A (GLA). Progressive, intralysosomal accumulation of neutral glycosphingolipids in endothelial cells and podocytes leads to multi-organ involvement in affected males and to a lesser extent in affected females. Diagnosis of FD is based on GLA analysis in leukocytes or dried blood spots (DBS) in FD males while GLA activities may be within the normal range in FD females. The advent of fluorometric and mass spectrometry methods for enzyme analysis in DBS has simplified the diagnostic approach for FD males, facilitating high-throughput screening of at risk populations and newborn infants. However, the diagnostic mainstay for FD females remains molecular analysis of the GLA gene. The following unit will provide the detailed analytical protocol for measurement of GLA activity in DBS using tandem mass spectrometry. Curr. Protoc. Hum. Genet. 77:17.13.1-17.13.7. © 2013 by John Wiley & Sons, Inc.

Keywords:

  • dried blood spot;
  • galactosidase alpha;
  • tandem mass spectrometry;
  • Fabry disease;
  • glycosphingolipid