Abstract:
:Autosomal recessive Charcot-Marie-Tooth syndrome (AR-CMT) is often characterised by an infantile disease onset and a severe phenotype. Mutations in the ganglioside-induced differentiation-associated protein 1 (GDAP1) gene are thought to be a common cause of AR-CMT. Mutations in the periaxin (PRX) gene are rare. They are associated with severe demyelination of the peripheral nerves and sometimes lead to prominent sensory disturbances. To evaluate the frequency of GDAP1 and PRX mutations in early onset CMT, we examined seven AR-CMT families and 12 sporadic CMT patients, all presenting with progressive distal muscle weakness and wasting. In one family also prominent sensory abnormalities and sensory ataxia were apparent from early childhood. In three families we detected four GDAP1 mutations (L58LfsX4, R191X, L239F and P153L), one of which is novel and is predicted to cause a loss of protein function. In one additional family with prominent sensory abnormalities a novel homozygous PRX mutation was found (A700PfsX17). No mutations were identified in 12 sporadic cases. This study suggests that mutations in the GDAP1 gene are a common cause of early-onset AR-CMT. In patients with early-onset demyelinating AR-CMT and severe sensory loss PRX is one of the genes to be tested.
journal_name
Neuropediatricsjournal_title
Neuropediatricsauthors
Auer-Grumbach M,Fischer C,Papić L,John E,Plecko B,Bittner RE,Bernert G,Pieber TR,Miltenberger G,Schwarz R,Windpassinger C,Grill F,Timmerman V,Speicher MR,Janecke ARdoi
10.1055/s-2008-1077085subject
Has Abstractpub_date
2008-02-01 00:00:00pages
33-8issue
1eissn
0174-304Xissn
1439-1899journal_volume
39pub_type
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