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Use of 4-trifluoromethylumbelliferyl-alpha-L-iduronide as a new substrate for detection of alpha-L-iduronidase deficiency in human tissues and for rapid prenatal diagnosis of Hurler disease.

Abstract：

:Results are presented of alpha-L-iduronidase assays in the leukocytes of normal individuals, patients with Hurler disease and heterozygous carriers. The assays were carried out using 4-methylumbelliferyl-alpha-L-iduronide and 4-trifluoromethylumbelliferyl-alpha-L-iduronide as substrates. It was shown that 4-trifluoromethylumbelliferyl-alpha-L-iduronide, along with the commonly used 4-methylumbelliferyl-alpha-L-iduronide, can serve as a specific substrate for alpha-L-iduronidase and is therefore suitable for demonstrating the enzyme deficiency in patients with Hurler disease, as well as the decrease of enzyme activity in heterozygous disease carriers. Using the two substrates a prenatal diagnosis of Hurler disease in a fetus was made on the basis of the lack of enzyme activity in amniotic fluid cell cultures. The diagnosis was confirmed by the results of alpha-L-iduronidase activity assay in fetal liver and kidney. It was found that 4-trifluoromethylumbelliferyl-alpha-L-iduronide is highly efficient for the rapid detection of alpha-L-iduronidase deficiency directly in pieces of tissues and in placenta, which is important for the prenatal diagnosis of Hurler disease.

journal_name

J Inherit Metab Dis

journal_title

Journal of inherited metabolic disease

authors

Tsvetkova IV,Karpova EA,Voznyi YV,Zolotukhina TV,Biryukov VV,Semyachkina AN

doi

10.1007/BF01800585

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

134-9

issue

2

eissn

0141-8955

issn

1573-2665

journal_volume

14

pub_type

杂志文章

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