Giant axonal neuropathy: a multicenter retrospective study with genotypic spectrum expansion
| Autor: | Patrick Aubourg, Jean-Marie Cuisset, Philippe Latour, Kouider Beladgham, Jimmy Perrot, Lucie Guyant-Marechal, Bruno Francou, Laurent Kremer, Naziha Baaloul, Alain Verloes, Andoni Echaniz-Laguna |
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| Rok vydání: | 2019 |
| Předmět: |
Male
0301 basic medicine Pediatrics medicine.medical_specialty Weakness Pes cavus Adolescent Encephalopathy Consanguinity 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Genetics medicine Humans Child Genetics (clinical) Retrospective Studies Giant axonal neuropathy business.industry Gigaxonin Brain medicine.disease Cytoskeletal Proteins 030104 developmental biology medicine.anatomical_structure Giant Axonal Neuropathy Child Preschool Peripheral nervous system Mutation Female medicine.symptom business Polyneuropathy 030217 neurology & neurosurgery |
| Zdroj: | neurogenetics. 21:29-37 |
| ISSN: | 1364-6753 1364-6745 |
| Popis: | Giant axonal neuropathy (GAN) is an autosomal recessive disease caused by mutations in the GAN gene encoding gigaxonin. Patients develop a progressive sensorimotor neuropathy affecting peripheral nervous system (PNS) and central nervous system (CNS). Methods: In this multicenter observational retrospective study, we recorded French patients with GAN mutations, and 10 patients were identified. Mean age of patients was 9.7 years (2-18), eight patients were female (80%), and all patients met infant developmental milestones and had a family history of consanguinity. Mean age at disease onset was 3.3 years (1-5), and progressive cerebellar ataxia and distal motor weakness were the initial symptoms in all cases. Proximal motor weakness and bulbar symptoms appeared at a mean age of 12 years (8-14), and patients used a wheelchair at a mean age of 16 years (14-18). One patient died at age 18 years from aspiration pneumonia. In all cases, nerve conduction studies showed a mixed demyelinating and axonal sensorimotor neuropathy and MRI showed brain and cerebellum white matter abnormalities. Polyneuropathy and encephalopathy both aggravated during the course of the disease. Patients also showed a variety of associated findings, including curly hair (100% of cases), pes cavus (80%), ophthalmic abnormalities (30%), and scoliosis (30%). Five new GAN mutations were found, including the first synonymous mutation and a large intragenic deletion. Our findings expand the genotypic spectrum of GAN mutations, with relevant implications for molecular analysis of this gene, and confirm that GAN is an age-related progressive neurodegenerative disease involving PNS and CNS. |
| Databáze: | OpenAIRE |
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