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Mitofusin 2 gene mutation (R94Q) causing severe early-onset axonal polyneuropathy (CMT2A)
C Neusch1, J Senderek, T Eggermann
1Department of Neurology, University Göttingen, Göttingen, Germany. cneusch@gwdg.de
European Journal of Neurology
|April 18, 2007
Summary
Charcot-Marie-Tooth disease type 2 (CMT2) can result from mutations in the mitofusin 2 (MFN2) gene. A German patient with early-onset CMT2 showed a spontaneous MFN2 mutation, highlighting the need for MFN2 screening in similar cases.
Area of Science:
- Genetics
- Neurology
- Molecular Biology
Background:
- Charcot-Marie-Tooth disease (CMT) is a group of inherited peripheral neuropathies.
- CMT is broadly classified into demyelinating (CMT1) and axonal (CMT2) forms.
- The CMT2A locus is associated with mutations in KIF1B and mitofusin 2 (MFN2) genes.
Observation:
- A German patient presented with early-onset, rapidly progressive axonal polyneuropathy (CMT2).
- The patient's condition showed no additional central nervous system pathology.
- A spontaneous mutation (c.281G-->A) in the MFN2 gene was identified in this patient.
Findings:
- The identified MFN2 mutation is linked to the patient's axonal form of Charcot-Marie-Tooth disease.
- This case demonstrates a novel spontaneous mutation in MFN2 causing CMT2.
- The clinical course was severe initially, then slowed, characteristic of some MFN2-related neuropathies.
Implications:
- MFN2 mutations are a significant cause of early-onset axonal polyneuropathy.
- Screening for MFN2 mutations should be considered in patients with early-onset axonal polyneuropathies.
- Further research into MFN2's role in CMT2 may reveal therapeutic targets.
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