Abstract:
:Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is an autosomal recessive multisystem disorder caused by thymidine phosphorylase (TP) deficiency, resulting in severe gastrointestinal dysmotility and skeletal muscle abnormalities. A patient is reported with a classical MNGIE clinical presentation but without skeletal muscle involvement at morphological, enzymatic, or mitochondrial DNA level, though gastrointestinal myopathy was present. MNGIE was diagnosed by markedly raised plasma thymidine and reduced thymidine phosphorylase activity. Molecular genetic analysis showed a homozygous novel splice site mutation in TP. On immunohistochemical studies there was marked TP expression in the CNS, in contrast to what has been observed in rodents. It is important to examine the most significantly affected tissue and to measure TP activity and plasma thymidine in order to arrive at an accurate diagnosis in this condition.
journal_name
J Med Genetjournal_title
Journal of medical geneticsauthors
Szigeti K,Wong LJ,Perng CL,Saifi GM,Eldin K,Adesina AM,Cass DL,Hirano M,Lupski JR,Scaglia Fdoi
10.1136/jmg.2003.013789keywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
125-9issue
2eissn
0022-2593issn
1468-6244journal_volume
41pub_type
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