کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3081181 1189367 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Late-onset MNGIE without peripheral neuropathy due to incomplete loss of thymidine phosphorylase activity
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب تکاملی
پیش نمایش صفحه اول مقاله
Late-onset MNGIE without peripheral neuropathy due to incomplete loss of thymidine phosphorylase activity
چکیده انگلیسی

Mitochondrial NeuroGastroIntestinal Encephalomyopathy (MNGIE) is an autosomal recessive disorder characterized by severe gastrointestinal dysmotility, cachexia, peripheral neuropathy, ptosis, ophthalmoplegia, and leukoencephalopathy with early onset and severe prognosis. Mutations in the TYMP/ECGF1 gene cause a loss of thymidine phosphorylase catalytic activity, disrupting the homeostasis of intramitochondrial nucleotide pool. We report a woman with a very late onset of MNGIE, lacking peripheral neuropathy. Thymidine phosphorylase activity was markedly reduced in cultured fibroblasts, but only mildly reduced in buffy coat, where the defect is usually detected, and plasma thymidine was mildly increased compared to typical MNGIE patients. TYMP/ECGF1 analysis detected two heterozygous mutations, including a novel missense mutation. These findings indicate that a partial loss of thymidine phosphorylase activity may induce a late-onset and incomplete MNGIE phenotype.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuromuscular Disorders - Volume 19, Issue 12, December 2009, Pages 837–840
نویسندگان
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