A case of Joubert syndrome caused by novel compound heterozygous variants in the gene
| Autor: | Anastasiya Aleksandrovna Kozina, Guria Kurbanovna Kanaeva, Natalia Vladimirovna Baryshnikova, Anna Yurievna Ilinskaya, Anna Alexandrovna Kim, Anastasia Vladimirovna Erofeeva, Nadezhda Andreevna Pogodina, Jamilya Payzutdinova Gadzhiyeva, Ekaterina Ivanovna Surkova, Valery Vladimirovich Ilinsky |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of International Medical Research, Vol 51 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1473-2300 03000605 |
| DOI: | 10.1177/03000605231206294 |
| Popis: | Joubert syndrome (JS) is a recessive disorder that is characterized by midbrain-hindbrain malformation and shows the “molar tooth sign” on magnetic resonance imaging. Mutations in 40 genes, including Abelson helper integration site 1 ( AHI1 ), inositol polyphosphate-5-phosphatase ( INPP5E ), coiled-coil and c2 domain-containing protein 2A ( CC2D2A ), and ARL2-like protein 1 ( ARL13B ), can cause JS. Classic JS is a part of a group of diseases associated with JS, and its manifestations include various neurological signs such as skeletal abnormalities, ocular coloboma, renal disease, and hepatic fibrosis. Here, we present a proband with the molar tooth sign, ataxia, and developmental and psychomotor delays in a Dagestan family from Russia. Molecular genetic testing revealed two novel heterozygous variants, c.2924G>A (p.Arg975His) in exon 28 and c.1241C>G (p.Pro414Arg) in exon 12 of the transmembrane protein 67 ( TMEM67 ) gene. These TMEM67 gene variants significantly affected the development of JS type 6. This case highlights the importance of whole exome sequencing for a proper clinical diagnosis of children with complex motor and psycho-language delays. This case also expands the clinical phenotype and genotype of TMEM67 -associated diseases. |
| Databáze: | Directory of Open Access Journals |
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