Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families
Mucopolysaccharidosis type I (MPS I) arises from a deficiency in the α-L-iduronidase (IDUA) enzyme. Although the clinical spectrum in MPS I patients is continuous, it was possible to recognize 3 phenotypes reflecting the severity of symptoms, viz., the Hurler, Scheie and Hurler/Scheie syndromes. In...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Genética
2011-01-01
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| Series: | Genetics and Molecular Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200004&lng=en&tlng=en |
| _version_ | 1818329160232206336 |
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| author | Luning Sun Chunyi Li Xiaoyu Song Ningning Zheng Haipeng Zhang Guizhang Dong |
| author_facet | Luning Sun Chunyi Li Xiaoyu Song Ningning Zheng Haipeng Zhang Guizhang Dong |
| author_sort | Luning Sun |
| collection | DOAJ |
| description | Mucopolysaccharidosis type I (MPS I) arises from a deficiency in the α-L-iduronidase (IDUA) enzyme. Although the clinical spectrum in MPS I patients is continuous, it was possible to recognize 3 phenotypes reflecting the severity of symptoms, viz., the Hurler, Scheie and Hurler/Scheie syndromes. In this study, 10 unrelated Chinese MPS I families (nine Hurler and one Hurler/Scheie) were investigated, and 16 mutant alleles were identified. Three novel mutations in IDUA genes, one missense p.R363H (c.1088G > A) and two splice-site mutations (c.1190-1G > A and c.792+1G > T), were found. Notably, 45% (nine out of 20) and 30% (six out of 20) of the mutant alleles in the 10 families studied were c.1190-1G > A and c.792+1G > T, respectively. The novel missense mutation p.R363H was transiently expressed in CHO cells, and showed retention of 2.3% IDUA activity. Neither p.W402X nor p.Q70X associated with the Hurler phenotype, or even p.R89Q associated with the Scheie phenotype, was found in this group. Finally, it was noted that the Chinese MPS I patients proved to be characterized with a unique set of IDUA gene mutations, not only entirely different from those encountered among Europeans and Americans, but also apparently not even the same as those found in other Asian countries. |
| first_indexed | 2024-12-13T12:43:38Z |
| format | Article |
| id | doaj.art-f2a26d633d1a4a0caaa545daa353a81b |
| institution | Directory Open Access Journal |
| issn | 1678-4685 |
| language | English |
| last_indexed | 2024-12-13T12:43:38Z |
| publishDate | 2011-01-01 |
| publisher | Sociedade Brasileira de Genética |
| record_format | Article |
| series | Genetics and Molecular Biology |
| spelling | doaj.art-f2a26d633d1a4a0caaa545daa353a81b2022-12-21T23:45:34ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1678-46852011-01-01342195200S1415-47572011000200004Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I familiesLuning Sun0Chunyi Li1Xiaoyu Song2Ningning Zheng3Haipeng Zhang4Guizhang Dong5China Medical UniversityChina Medical UniversityChina Medical UniversityChina Medical UniversityChina Medical UniversityChina Medical UniversityMucopolysaccharidosis type I (MPS I) arises from a deficiency in the α-L-iduronidase (IDUA) enzyme. Although the clinical spectrum in MPS I patients is continuous, it was possible to recognize 3 phenotypes reflecting the severity of symptoms, viz., the Hurler, Scheie and Hurler/Scheie syndromes. In this study, 10 unrelated Chinese MPS I families (nine Hurler and one Hurler/Scheie) were investigated, and 16 mutant alleles were identified. Three novel mutations in IDUA genes, one missense p.R363H (c.1088G > A) and two splice-site mutations (c.1190-1G > A and c.792+1G > T), were found. Notably, 45% (nine out of 20) and 30% (six out of 20) of the mutant alleles in the 10 families studied were c.1190-1G > A and c.792+1G > T, respectively. The novel missense mutation p.R363H was transiently expressed in CHO cells, and showed retention of 2.3% IDUA activity. Neither p.W402X nor p.Q70X associated with the Hurler phenotype, or even p.R89Q associated with the Scheie phenotype, was found in this group. Finally, it was noted that the Chinese MPS I patients proved to be characterized with a unique set of IDUA gene mutations, not only entirely different from those encountered among Europeans and Americans, but also apparently not even the same as those found in other Asian countries.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200004&lng=en&tlng=enmucopolysaccharidosis type Iα-L-iduronidasemutationpolymorphism |
| spellingShingle | Luning Sun Chunyi Li Xiaoyu Song Ningning Zheng Haipeng Zhang Guizhang Dong Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families Genetics and Molecular Biology mucopolysaccharidosis type I α-L-iduronidase mutation polymorphism |
| title | Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families |
| title_full | Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families |
| title_fullStr | Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families |
| title_full_unstemmed | Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families |
| title_short | Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families |
| title_sort | three novel α l iduronidase mutations in 10 unrelated chinese mucopolysaccharidosis type i families |
| topic | mucopolysaccharidosis type I α-L-iduronidase mutation polymorphism |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200004&lng=en&tlng=en |
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