This case illustrates the clinical heterogeneity that exists in neuropathies associated with MPZ mutations and highlights that in patients with mild hypotonia in the first months that develop a very severe demyelinating neuropathy, the MPZ gene must be taken into account.
We report a patient with Charcot-Marie-Tooth disease (CMT) due to the p.Ile112Thr mutation in myelin protein zero (MPZ) who presented with a patchy neuropathy with conduction block and tonic pupils.
Identifying molecular pathways involved in early and late onset CMT1B will be crucial to understand how MPZ mutations cause CMT1B so that rational therapies for both early and late onset neuropathies can be developed.
Moreover, we provide strong evidence that the Schwann cell-specific ablation of the ERAD factor Derlin-2 in S63del nerves exacerbates both the myelin defects and the UPR in vivo, unveiling a protective role for ERAD in CMT1Bneuropathy.
Molecular genetic testing and particularly screening for MPZ mutations in late onset neuropathies are important to differentiate acquired and inherited neuropathies.
The Pro132Leu mutation segregates with a severe early-onset dysmyelinating-hypomyelinating neuropathy, whereas the Ile135Thr substitution is associated with the classical phenotype of CMT1.
Charcot-Marie-Tooth disease (CMT) is a group of clinically and genetically heterogeneous neuropathies classically divided into demyelinating (CMT1) and axonal forms (CMT2).
Pharmacogenetic Discovery in CALGB (Alliance) 90401 and Mechanistic Validation of a VAC14 Polymorphism that Increases Risk of Docetaxel-Induced Neuropathy.
Mitofusin-2 (Mfn2) is a mitochondrial membrane protein that participates in mitochondrial fusion in mammalian cells and mutations in the Mfn2 gene cause Charcot-Marie-Tooth neuropathy type 2A.
Missense mutations in the murine peripheral myelin protein-22 gene (Pmp22) underly the neuropathies in the trembler (Tr) and trembler-J (Tr-J) mice and in some humans with Charcot-Marie-Tooth disease.
Hereditary motor and sensory neuropathy (HMSN), also known as Charcot-Marie-Tooth disease (CMT) is a group of clinically and genetically heterogeneous neuropathies classically divided into demyelinating (CMT1) and axonal forms (CMT2).
In this study, we modeled HSPB1 mutant-induced neuropathies in Drosophila using a human HSPB1<sup>S135F</sup> mutant that has a missense mutation in its α-crystallin domain.
Our results suggest that alterations in the formation of a normal IF network in neurons elicited by these NFL mutations may contribute to the development of Charcot-Marie-Tooth neuropathy.
Charcot-Marie-Tooth disease (CMT) is a group of clinically and genetically heterogeneous neuropathies classically divided into demyelinating (CMT1) and axonal forms (CMT2).