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Thiamine-responsive anemia in DIDMOAD syndrome.
C Borgna-Pignatti1, P Marradi, L Pinelli
1Department of Pediatrics, University of Verona, Italy.
The Journal of Pediatrics
|March 1, 1989
Summary
DIDMOAD syndrome, a rare genetic disorder, may stem from an inherited thiamine metabolism defect. Thiamine supplementation corrected anemia and reduced insulin needs in affected children.
Area of Science:
- Metabolic disorders
- Genetics
- Pediatrics
Background:
- DIDMOAD syndrome (Diabetes Insipidus, Diabetes Mellitus, Optic Atrophy, Deafness) is a rare multisystem degenerative disorder.
- Hematologic abnormalities, including anemia and neutropenia, were observed in two patients with DIDMOAD syndrome.
Observation:
- Patients presented with megaloblastic and sideroblastic anemia, neutropenia, and borderline thrombocytopenia.
- Plasma thiamine levels were low in one patient and normal in another.
- Erythrocyte thiamine pyrophosphate and thiamine pyrophosphokinase activity were significantly reduced in both patients compared to controls.
Findings:
- Thiamine supplementation led to normalization of hematologic parameters and decreased insulin requirements within one month.
- Discontinuation of thiamine treatment resulted in recurrent anemia and increased insulin needs, indicating a direct correlation.
Implications:
- These findings suggest an underlying inherited defect in thiamine metabolism as a potential cause of DIDMOAD syndrome.
- Thiamine therapy may be a crucial treatment for hematologic and metabolic derangements in DIDMOAD syndrome.
- Further research into thiamine-dependent pathways could elucidate the pathophysiology of this syndrome.