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[Inclusion Body Myopathy, Paget's Disease, and Fronto-temporal Dementia: a VCP-related Multi-systemic Proteinopathy]
David Mengel1, Damiano Librizzi2, Benedikt Schoser3
1Klinik für Neurologie, Philipps-Universität Marburg, Marburg.
Abstract:
Mutations of the human VCP gene, which encodes the V: alosin C: ontaining P: rotein (synonyms: p97, TER ATPase), are associated with various multi-systemic protein aggregation diseases. We report on a patient with progressive myopathy and incipient cognitive deficits. A diagnostic muscle biopsy revealed an inclusion body myopathy with protein aggregates. Magnetic resonance imaging and F18-positron-emission-tomography disclosed a fronto-temporal atrophy and glucose hypometabolism of the frontal and temporal lobes, respectively. Based on the clinical findings, a genetic analysis was performed which revealed a heterozygous c.277C>T (p.Arg93Cys) mutation of the VCP gene, thus confirming the diagnosis of IBMPFD (I: nclusion B: ody M: yopathie with P: aget Disease of the Bones and F: ronto-temporal D: ementia).
Insights
Genetic analysis revealed a VCP gene mutation in a patient with progressive myopathy and cognitive deficits, confirming Inclusion Body Myopathy with Paget Disease and Fronto-temporal Dementia (IBMPFD). This highlights VCP mutations in multi-system protein aggregation diseases.
Area of Science:
- Genetics
- Neurology
- Pathology
Background:
- Mutations in the VCP gene, encoding Valosin Containing Protein (p97), are linked to multi-systemic protein aggregation disorders.
- Protein aggregation diseases pose significant diagnostic and therapeutic challenges due to their complex pathology.
Observation:
- A patient presented with progressive myopathy and early cognitive decline.
- Muscle biopsy confirmed inclusion body myopathy with protein aggregates.
- Neuroimaging revealed fronto-temporal atrophy and glucose hypometabolism.
Findings:
- Genetic analysis identified a heterozygous c.277C>T (p.Arg93Cys) mutation in the VCP gene.
- This mutation confirmed the diagnosis of Inclusion Body Myopathy with Paget Disease and Fronto-temporal Dementia (IBMPFD).
Implications:
- This case underscores the role of VCP gene mutations in IBMPFD.
- Early genetic diagnosis is crucial for managing patients with VCP-associated proteinopathies.
- Further research into VCP function may reveal therapeutic targets for protein aggregation diseases.