Peripheral nerve involvement in fukuyama congenital muscular dystrophy: a case report

Area of Science:

• Neurology
• Genetics
• Biochemistry

Background:

• Fukuyama congenital muscular dystrophy (FCMD) is a genetic disorder characterized by muscle weakness and central nervous system (CNS) abnormalities.
• It stems from mutations in the fukutin gene, affecting α-dystroglycan glycosylation, but fukutin's precise roles remain unclear.
• α-dystroglycan is present in muscle, brain, and peripheral nerves, hinting at broader implications of fukutin deficiency.

Observation:

• This report details a 7-year-old female diagnosed with FCMD.
• The patient presented with generalized muscle weakness and CNS migration disturbances.
• Additionally, she exhibited symptoms of demyelinating peripheral polyneuropathy.

Findings:

• The study observed a correlation between FCMD and peripheral nerve demyelination in the patient.
• Aberrant glycosylation of Schwann cell α-dystroglycan due to fukutin deficiency is proposed as the underlying mechanism.
• This suggests fukutin plays a crucial role in peripheral nerve myelination.

Implications:

• These findings expand the understanding of FCMD beyond muscle and CNS, highlighting its impact on peripheral nerves.
• It suggests potential therapeutic targets for managing neurological complications in FCMD patients.
• Further research into fukutin's function in myelination could reveal new insights into peripheral neuropathies.