Myofibrillar myopathies.
PURPOSE OF REVIEW: The aim of this communication is to provide an up-to-date overview of myofibrillar myopathies (MFMs). RECENT FINDINGS: The most important recent advance in the MFMs has been the identification of mutation in Bag3 (Bcl-2-associated athanogene-3) as a new cause of MFM. Although, the typical clinical manifestations of MFMs are slowly progressive weakness, the patients with Bag3opathy may have had a rapidly progressive and more severe phenotype. SUMMARY: Several MFM disease genes have recently been recognized. The identified disease proteins (desmin, alphaB-crystallin, myotilin, Zasp, filamin C, and Bag3) interact with components or with chaperones of the Z-disk. In each case the molecular defect leads to a largely stereotyped cascade of structural perturbation of the muscle fiber architecture.[1]References
- Myofibrillar myopathies. Selcen, D. Curr. Opin. Neurol. (2010) [Pubmed]
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