MNGIE with lack of skeletal muscle involvement and a novel TP splice site mutation.

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 Genet

authors

Szigeti K,Wong LJ,Perng CL,Saifi GM,Eldin K,Adesina AM,Cass DL,Hirano M,Lupski JR,Scaglia F

doi

10.1136/jmg.2003.013789

keywords:

subject

Has Abstract

pub_date

2004-02-01 00:00:00

pages

125-9

issue

2

eissn

0022-2593

issn

1468-6244

journal_volume

41

pub_type

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