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- W2038324114 abstract "Tay-Sachs disease is a lethal neurodegenerative disorder caused by deficiency of the lysosomal enzyme beta-hexosaminidase A and inherited in an autosomal recessive fashion; carriers of the disease are 10 times more frequent in the Ashkenazi Jewish community than in the general population. Over 90% of North American Ashkenazi carriers tested have been shown to have either a splice site mutation at the boundary of exon 12 and intron 12 in the beta-hexosaminidase alpha subunit gene, or a 4 base pair insertion in exon 11. We describe simple assays involving amplification of DNA across these two mutation sites by polymerase chain reaction and the results of screening 75 subjects are given. The frequencies of the splice and insert mutations in 41 UK Ashkenazi carriers (20% to 80%, respectively) were similar to those found in the North American community. Twelve Ashkenazi subjects classified as non-carriers on enzyme assay were found to be negative for both mutations tested. All Ashkenazi carriers tested (both obligate carriers and those picked up by population screening) had either the splice or insert mutations; in contrast to this, only 21% of the non-Ashkenazi carriers had one or other of these mutations. It is concluded that within the carrier screening programmes for the Ashkenazi community, assays for the splice and insert mutations, together with an assay recently described for a mutation causing the rarer adult onset form of the disease, will prove useful as confirmatory tests for subjects who give positive or borderline results when screened on enzyme assay." @default.
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- W2038324114 date "1991-03-01" @default.
- W2038324114 modified "2023-09-25" @default.
- W2038324114 title "Frequency of the Tay-Sachs disease splice and insertion mutations in the UK Ashkenazi Jewish population." @default.
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- W2038324114 doi "https://doi.org/10.1136/jmg.28.3.177" @default.
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