Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib
Glycogen storage disease (GSD) comprises a group of autosomal recessive disorders characterized by deficiency of the enzymes that regulate the synthesis or degradation of glycogen. Types Ia and Ib are the most prevalent; while the former is caused by deficiency of glucose-6-phosphatase (G6Pase), the...
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| Format: | Article |
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Sociedade Brasileira de Genética
2013-01-01
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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=S1415-47572013000400007&lng=en&tlng=en |
| _version_ | 1819125379737059328 |
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| author | Marcelo Paschoalete Carlin Daniel Zanetti Scherrer Adriana Maria Alves De Tommaso Carmen Silvia Bertuzzo Carlos Eduardo Steiner |
| author_facet | Marcelo Paschoalete Carlin Daniel Zanetti Scherrer Adriana Maria Alves De Tommaso Carmen Silvia Bertuzzo Carlos Eduardo Steiner |
| author_sort | Marcelo Paschoalete Carlin |
| collection | DOAJ |
| description | Glycogen storage disease (GSD) comprises a group of autosomal recessive disorders characterized by deficiency of the enzymes that regulate the synthesis or degradation of glycogen. Types Ia and Ib are the most prevalent; while the former is caused by deficiency of glucose-6-phosphatase (G6Pase), the latter is associated with impaired glucose-6-phosphate transporter, where the catalytic unit of G6Pase is located. Over 85 mutations have been reported since the cloning of G6PC and SLC37A4 genes. In this study, twelve unrelated patients with clinical symptoms suggestive of GSDIa and Ib were investigated by using genetic sequencing of G6PC and SLC37A4 genes, being three confirmed as having GSD Ia, and two with GSD Ib. In seven of these patients no mutations were detected in any of the genes. Five changes were detected in G6PC, including three known point mutations (p.G68R, p.R83C and p.Q347X) and two neutral mutations (c.432G > A and c.1176T > C). Four changes were found in SLC37A4: a known point mutation (p.G149E), a novel frameshift insertion (c.1338_1339insT), and two neutral mutations (c.1287G > A and c.1076-28C > T). The frequency of mutations in our population was similar to that observed in the literature, in which the mutation p.R83C is also the most frequent one. Analysis of both genes should be considered in the investigation of this condition. An alternative explanation to the negative results in this molecular study is the possibility of a misdiagnosis. Even with a careful evaluation based on laboratory and clinical findings, overlap with other types of GSD is possible, and further molecular studies should be indicated. |
| first_indexed | 2024-12-22T07:39:12Z |
| format | Article |
| id | doaj.art-36e107e6ce8b4cd39e88db908bcd5212 |
| institution | Directory Open Access Journal |
| issn | 1678-4685 |
| language | English |
| last_indexed | 2024-12-22T07:39:12Z |
| publishDate | 2013-01-01 |
| publisher | Sociedade Brasileira de Genética |
| record_format | Article |
| series | Genetics and Molecular Biology |
| spelling | doaj.art-36e107e6ce8b4cd39e88db908bcd52122022-12-21T18:33:47ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1678-46852013-01-0136450250610.1590/S1415-47572013000400007S1415-47572013000400007Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and IbMarcelo Paschoalete Carlin0Daniel Zanetti Scherrer1Adriana Maria Alves De Tommaso2Carmen Silvia Bertuzzo3Carlos Eduardo Steiner4Universidade Estadual de CampinasUniversidade Estadual de CampinasUniversidade Estadual de CampinasUniversidade Estadual de CampinasUniversidade Estadual de CampinasGlycogen storage disease (GSD) comprises a group of autosomal recessive disorders characterized by deficiency of the enzymes that regulate the synthesis or degradation of glycogen. Types Ia and Ib are the most prevalent; while the former is caused by deficiency of glucose-6-phosphatase (G6Pase), the latter is associated with impaired glucose-6-phosphate transporter, where the catalytic unit of G6Pase is located. Over 85 mutations have been reported since the cloning of G6PC and SLC37A4 genes. In this study, twelve unrelated patients with clinical symptoms suggestive of GSDIa and Ib were investigated by using genetic sequencing of G6PC and SLC37A4 genes, being three confirmed as having GSD Ia, and two with GSD Ib. In seven of these patients no mutations were detected in any of the genes. Five changes were detected in G6PC, including three known point mutations (p.G68R, p.R83C and p.Q347X) and two neutral mutations (c.432G > A and c.1176T > C). Four changes were found in SLC37A4: a known point mutation (p.G149E), a novel frameshift insertion (c.1338_1339insT), and two neutral mutations (c.1287G > A and c.1076-28C > T). The frequency of mutations in our population was similar to that observed in the literature, in which the mutation p.R83C is also the most frequent one. Analysis of both genes should be considered in the investigation of this condition. An alternative explanation to the negative results in this molecular study is the possibility of a misdiagnosis. Even with a careful evaluation based on laboratory and clinical findings, overlap with other types of GSD is possible, and further molecular studies should be indicated.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400007&lng=en&tlng=enDNA-based diagnosisglycogen storage diseaseG6PCSLC37A4mutation |
| spellingShingle | Marcelo Paschoalete Carlin Daniel Zanetti Scherrer Adriana Maria Alves De Tommaso Carmen Silvia Bertuzzo Carlos Eduardo Steiner Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib Genetics and Molecular Biology DNA-based diagnosis glycogen storage disease G6PC SLC37A4 mutation |
| title | Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib |
| title_full | Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib |
| title_fullStr | Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib |
| title_full_unstemmed | Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib |
| title_short | Determining mutations in G6PC and SLC37A4 genes in a sample of Brazilian patients with glycogen storage disease types Ia and Ib |
| title_sort | determining mutations in g6pc and slc37a4 genes in a sample of brazilian patients with glycogen storage disease types ia and ib |
| topic | DNA-based diagnosis glycogen storage disease G6PC SLC37A4 mutation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400007&lng=en&tlng=en |
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