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Inborn errors of biotin metabolism
1Department of Pediatrics, University of California-San Diego, La Jolla 92093-0609.
Archives of Dermatology
|December 1, 1987
Summary
Two new inborn errors of biotin metabolism, affecting holocarboxylase synthetase and biotinidase enzymes, cause severe skin, hair, and metabolic issues in infants. Early diagnosis and treatment are crucial for managing these rare genetic disorders.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Biotin is essential for human physiology.
- Two newly identified inborn errors of biotin metabolism have been recognized.
- These metabolic disorders significantly impact infant health.
Purpose of the Study:
- To highlight the crucial role of biotin in human physiology.
- To describe two newly discovered inborn errors of biotin metabolism.
- To detail the clinical manifestations and molecular defects associated with these disorders.
Main Methods:
- Clinical case study analysis.
- Enzyme activity assays.
- Molecular genetic analysis.
Main Results:
- Neonatal-onset disease linked to holocarboxylase synthetase deficiency presents with total body rash and alopecia totalis.
- Infantile-onset disease linked to biotinidase deficiency shows patchy alopecia and skin lesions similar to acrodermatitis enteropathica.
- Both conditions are complicated by recurrent metabolic crises including acidosis and ketosis.
Conclusions:
- Inborn errors of biotin metabolism, specifically holocarboxylase synthetase deficiency and biotinidase deficiency, have significant clinical consequences.
- These disorders underscore the critical role of biotin in maintaining skin, hair, and metabolic homeostasis.
- Prompt diagnosis and intervention are vital for managing these rare genetic conditions and preventing severe complications.