Usefulness of 4-methylumbelliferyl-6-sulfo-2-acetamido-2-deoxy-beta-D-glucopyrano sid e for the diagnosis of GM2 gangliosidoses in leukocytes.

Abstract:

:4-Methylumbelliferyl-6-sulfo-2-acetamido-2-deoxy-beta-D-glucopyranoside was synthesized and tested as a substrate for the diagnosis of GM2 gangliosidoses using leukocytes. Less than 2% of normal activity was measured in homogenates from patients with typical Tay-Sachs disease and from a patient with a variant form having 37% Hexosaminidase A by heat denaturation using the usual fluorogenic substrate. An adult patient had 8.5% of normal activity. Three patients with Sandhoff disease were found to have values ranging from 17% to 37% of normal. These values overlap the range found for carriers of Tay-Sachs disease, and suggest that the usefulness of this substrate, while excellent for diagnosing B variants of GM2 gangliosidosis, requires further study. Perhaps when used together with 4-methylumbelliferyl-2-acetamido-2-deoxy-beta-D-glucopyranoside excellent discriminations of patients, carriers and controls will be realized.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Inui K,Wenger DA

doi

10.1111/j.1399-0004.1984.tb01066.x

subject

Has Abstract

pub_date

1984-10-01 00:00:00

pages

318-21

issue

4

eissn

0009-9163

issn

1399-0004

journal_volume

26

pub_type

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