Unger, Andreas, Dekomien, Gabriele, Guettsches, Anne, Dreps, Thomas, Kley, Rudolf, Tegenthoff, Martin, Ferbert, Andreas, Weis, Joachim, Heyer, Christoph, Linke, Wolfgang A., Martinez-Carrera, Lilian, Storbeck, Markus, Wirth, Brunhilde ORCID: 0000-0003-4051-5191, Hoffjan, Sabine and Vorgerd, Matthias (2016). Expanding the phenotype of BICD2 mutations toward skeletal muscle involvement. Neurology, 87 (21). S. 2235 - 2244. PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1526-632X

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Abstract

Objective: To expand the spectrum of bicaudal D, Drosophila, homologue 2 (BICD2) gene-related diseases, which so far includes autosomal dominant spinal muscular atrophy with lower extremity predominance 2 and hereditary spastic paraplegia due to mutations in the BICD2 gene. Methods: We analyzed 2 independent German families with clinical, genetic, and muscle MRI studies. In both index patients, muscle histopathologic studies were performed. Transfection studies were carried out to analyze the functional consequences of the disease-causing mutations. Results: We identified the mutations p.Ser107Leu and p.Thr703Met in the BICD2 gene in the 2 families, respectively. In contrast to other patients carrying the same mutations, our patients present features of a myopathy with slow progression. Immunofluorescence studies and immunoelectron microscopy showed striking impairment of Golgi integrity, vesicle pathology, and abnormal BICD2 accumulation either within the nuclei (p.Ser107Leu) or in the perinuclear region (p.Thr703Met). Transfection studies confirmed BICD2 aggregation in different subcellular locations. Conclusions: Our findings extend the phenotypic spectrum of BICD2-associated disorders by features of a chronic myopathy and show a pathomechanism of BICD2 defects in skeletal muscle.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Unger, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dekomien, GabrieleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guettsches, AnneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dreps, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kley, RudolfUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tegenthoff, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ferbert, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weis, JoachimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heyer, ChristophUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Linke, Wolfgang A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martinez-Carrera, LilianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Storbeck, MarkusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wirth, BrunhildeUNSPECIFIEDorcid.org/0000-0003-4051-5191UNSPECIFIED
Hoffjan, SabineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vorgerd, MatthiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-255519
DOI: 10.1212/WNL.0000000000003360
Journal or Publication Title: Neurology
Volume: 87
Number: 21
Page Range: S. 2235 - 2244
Date: 2016
Publisher: LIPPINCOTT WILLIAMS & WILKINS
Place of Publication: PHILADELPHIA
ISSN: 1526-632X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SPINAL MUSCULAR-ATROPHY; DISTAL MYOPATHY; MOTOR ADAPTER; DISEASES; LOCALIZATION; DISORDERS; TRANSPORT; DYSFERLIN; VESICLES; DEFECTSMultiple languages
Clinical NeurologyMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25551

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