AI Article Synopsis
- Mitofusin 2 (MFN2) is a mitochondrial protein involved in the fusion and fission of mitochondria and is associated with Charcot-Marie-Tooth disease type 2A (CMT2A), impacting the nervous system.
- A new case study highlights a unique instance where a specific MFN2 mutation (p.Arg104Trp) in an infant leads to unusual symptoms, including choreic movements and severe muscle weakness.
- The research discusses how defects in mitochondrial DNA maintenance may influence dopamine-related neurotransmitter issues due to the role of MFN2 in cellular metabolism.
Article Abstract
Mitofusin (MFN) 2 belongs to the large family of mitochondrial transmembrane GTPases and has a role in dynamic mitochondrial remodeling process governed by fusion and fission. MFN2 pathogenic variants classically cause Charcot-Marie-Tooth disease type 2A (CMT2A), the most common axonal form of CMT, but patients with complex and unusual phenotypes involving the central and peripheral nervous system have been described, with mitochondrial dysfunction proposed as the underlying pathogenic mechanism. Here, we report the first description of a neurochemical pattern of secondary alterations in the metabolism of biogenic amines linked to the de novo presence of the hotspot MFN2 pathogenic variant p.Arg104Trp. The infant presented a very early onset choreic movement disorder associated with severe axial hypotonia and fluctuating dystonia of limbs. The relationship between mitochondrial DNA (mtDNA) maintenance defects and dopaminergic neurotransmitter disorders, governed by MFN2, is discussed.
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| http://dx.doi.org/10.1016/j.mito.2021.09.011 | DOI Listing |
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