Mitochondrial DNA deletion in a child with megaloblastic anemia and recurrent encephalopathy.

Abstract:

:A 3 1/2-year-old boy presented with megaloblastic anemia and recurrent episodes of severe lactic acidosis and coma. At age 4 years, he developed sepsis and died; postmortem examination failed to show any gross abnormality in any tissue. Biochemical analysis of muscle showed decreased activities for all respiratory chain enzymes except complex II. Muscle histochemistry revealed diffuse cytochrome c oxidase deficiency. Southern blot analysis of mitochondrial DNA from muscle, liver, and blood showed a heteroplasmic single mitochindrial DNA deletion of 2.4 kb, which removed the genes for cytochrome c oxidase I and II and the transfer ribonucleic acid genes for serine and aspartic acid. Single large-scale deletions in mitochondrial DNA have been associated with Pearson's syndrome, Kearns-Sayre syndrome, and progressive external ophthalmoplegia. This patient's presentation is unusual and suggests an overlap between Pearson's syndrome and Kearns-Sayre syndrome.

journal_name

J Child Neurol

authors

Akman CI,Sue CM,Shanske S,Tanji K,Bonilla E,Ojaimi J,Krishna S,Schubert R,DiMauro S

doi

10.1177/088307380401900403

subject

Has Abstract

pub_date

2004-04-01 00:00:00

pages

258-61

issue

4

eissn

0883-0738

issn

1708-8283

journal_volume

19

pub_type

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