Related Experiment Videos
Carrier detection for Sanfilippo A syndrome
J Stone1, A Brimble, C A Pennock
1Department of Paediatric Chemical Pathology, Bristol Maternity Hospital, UK.
Journal of Inherited Metabolic Disease
|January 1, 1990
Summary
This study identified a key enzyme difference in Sanfilippo A carriers. Assaying heparan sulphamidase at 55°C clearly distinguishes carriers from healthy individuals.
Area of Science:
- Biochemistry
- Genetics
- Enzymology
Background:
- Sanfilippo A syndrome is a rare genetic disorder.
- Heparan sulphamidase deficiency causes Sanfilippo A.
- Identifying carriers is crucial for genetic counseling.
Purpose of the Study:
- To establish a reliable method for identifying Sanfilippo A carriers.
- To differentiate heterozygous carriers from normal individuals using enzyme activity.
Main Methods:
- Leukocytes from 21 Sanfilippo A carriers and 49 controls were analyzed.
- Heparan sulphamidase (EC 3.10.1.1) activity was measured.
- Enzyme assays were conducted at a specific temperature of 55 degrees C.
Main Results:
- A clear distinction in heparan sulphamidase activity was observed.
- The assay at 55°C effectively separated carriers from controls.
- This method shows high sensitivity for carrier detection.
Conclusions:
- Assaying heparan sulphamidase at 55°C provides an absolute distinction between Sanfilippo A carriers and normal individuals.
- This enzyme assay is a valuable tool for carrier screening in Sanfilippo A families.