Vincristine exacerbates asymptomatic Charcot–Marie–Tooth disease with a novel EGR2 mutation

Neurogenetics - Tập 13 - Trang 77-82 - 2012
Tomonori Nakamura1, Akihiro Hashiguchi1, Shinsuke Suzuki2, Kimiharu Uozumi2, Shoko Tokunaga1, Hiroshi Takashima1
1Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima City, Japan
2Department of Hematology and Immunology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima City, Japan

Tóm tắt

Neurotoxicity is a common side effect of vincristine (VCR) treatment. Severe exacerbations of neuropathy have been reported in patients with Charcot–Marie–Tooth disease (CMT) 1A with duplication of the peripheral myelin protein 22 (PMP22) gene. However, whether or not VCR exacerbates neuropathies through mutations in other CMT-associated genes besides PMP22 duplication has not been well studied. The purpose of this study was to identify mutations in any CMT-associated genes in a patient with hypersensitivity to VCR. We performed clinical, electrophysiological, and genetic examinations of a 23-year-old woman, who was hypersensitive to low-dose VCR, and her healthy mother. DNA analysis was performed using our specially designed resequencing array that simultaneously screens for 28 CMT-associated genes. Electrophysiological studies revealed that the patient and her healthy mother had demyelinating polyneuropathy. Furthermore, they showed the same novel mutation in the early growth response 2 (EGR2) gene. Recognizing pre-existing asymptomatic CMT by electrophysiological studies and genetic analysis before VCR treatment allowed us to prevent severe VCR-induced neuropathy.

Tài liệu tham khảo

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