Novel VCP mutations in inclusion body myopathy associated with Paget disease of bone and frontotemporal dementia

Watts, G. D. J., Thomasova, D., Ramdeen, S. K., Fulchiero, E. C., Mehta, S. G., Drachman, D. A., Weihl, C. C., Jamrozik, Z., Kwiecinski, H., Kaminska, A. and Kimonis, V. E. (2007) Novel VCP mutations in inclusion body myopathy associated with Paget disease of bone and frontotemporal dementia. Clinical Genetics, 72 (5). pp. 420-426. ISSN 1399-0004

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Abstract

Inclusion body myopathy associated with Paget disease of bone and frontotemporal dementia (IBMPFD, OMIM 167320) has recently been attributed to eight missense mutations in valosin-containing protein (VCP). We report novel VCP mutations N387H and L198W in six individuals from two families who presented with proximal muscle weakness at a mean age of diagnosis of 40 years, most losing the ability to walk within a few years of onset. Electromyographic studies in four individuals were suggestive of ‘myopathic’ changes, and neuropathic pattern was identified in one individual in family 1. Muscle biopsy in four individuals showed myopathic changes characterized by variable fiber size, two individuals showing rimmed vacuoles and IBM-type cytoplasmic inclusions in muscle fibers, and electron microscopy in one individual revealing abundant intranuclear inclusions. Frontotemporal dementia associated with characteristic behavioral changes including short-term memory loss, language difficulty, and antisocial behavior was observed in three individuals at a mean age of 47 years. Detailed brain pathology in one individual showed cortical degenerative changes, most severe in the temporal lobe and hippocampus. Abundant ubiquitin-positive tau-, α-synuclein-, polyglutamine repeat-negative neuronal intranuclear inclusions and only rare intracytoplasmic VCP positive inclusions were seen. These new mutations may cause structural changes in VCP and provide some insight into the functional effects of pathogenic mutations.

Item Type:	Article
Faculty \ School:	Faculty of Medicine and Health Sciences > Norwich Medical School
UEA Research Groups:	Faculty of Medicine and Health Sciences > Research Groups > Medicine (former - to 2013) Faculty of Medicine and Health Sciences > Research Groups > Musculoskeletal Medicine
Depositing User:	EPrints Services
Date Deposited:	25 Nov 2010 11:13
Last Modified:	24 Sep 2024 09:44
URI:	https://ueaeprints.uea.ac.uk/id/eprint/15312
DOI:	10.1111/j.1399-0004.2007.00887.x

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